Forks

ENVE's Road Fork is the fork by which all others are judged, built for road cyclists looking for the optimal balance of weight, strength, and stiffness. When everyone was turning away from the fork aftermarket, we focused our efforts on creating the best aftermarket fork we could. By following our mantra of functional simplicity, we developed a manufacturing process that allows the fibers in an ENVE fork to run continuously from the top of the steerer to the bottom of the drop-outs. The ENVE forks feature a hollow one-piece design free of bonding or drilling, and the brake bolt hole is molded into the crown, allowing for additional weight savings and strength. You can literally put an ENVE fork on a bike within minutes of it leaving the mold. While this manner of construction is novel, the real win is that the majority of artisan frame builders and customers choose ENVE as their fork of choice due to its confident on-road performance and handling characteristics.

A purpose built carbon fiber fork for gravel and cyclocross applications featuring internal hose routing, flat mount brake compatibility, and clearance for up to 50mm tires. This fork is perfect for gravel riders looking for more clearance, weight savings, compliance, and the versatility of fender mounts to enhance their gravel grinding experience. - Material: Carbon - Weight: 520g - Steer Tube Length: 350mm - Rake: 50mm - Axle To Crown: 395mm - Max Rotor Size: 140mm – 160mm - Max Tire Clearance: 700c x 50c, 27.5 x 2.25-inch - Crown Race Diameter: 1.5-inch - Torque Spec - Steer Tube: 5.5Nm - Torque Spec - Axle: 8Nm

With bigger bikes there comes bigger demands. Thankfully, we created the 35 Gold to meet all of them, both in performance and value. Whether you have an E-MTB or MTB, the burly 35 Gold checks the box with our proven DebonAir spring and Motion Control damping. And new this year is an E-MTB-focused option with mounting points for optional full or short fenders. All told, you might wonder how we packed so much quality and performance into such a wallet-friendly package. Features - New E-MTB endorsement options with fender mounts are appropriate for all E-bikes (1.8" taper available) - New graphics are easy to read and make a fresh impact - Motion Control damping featuring low-speed compression adjustment to lockout - Highly tunable DebonAir spring offers a consistent feel throughout the travel - Fits Tires up to 2.8" (without fenders; the use of a full fender will reduce tire clearance) - Fast Black finished 35mm aluminum upper tubes couple stiffness and lightweight with a premium look - Offset: 44mm

The Z1 is freedom from the status quo. Step outside enduro's obsession with counting seconds and go have some fun in the woods. The Z1 is an aggressive all-mountain and enduro fork with a different viewpoint for riders' priorities. Everyone wants suspension performance that's smooth as butter with great traction and control, and that's where the Z1 shines. After that, the Z1 departs from industry norms. More time fiddling with adjustments means less time shredding the trails. The Z1 keeps it simple with intuitive compression sweep adjustment, from locked out to full open. Simple rebound adjustment covers the range from fast to slow rebound for a full range of rider weights and preferences without overcomplicating things. Plus, it's biased towards stiffness, ride performance, and durability, so while it's carrying a few extra grams, you probably won't notice because you're having too much fun. - 36mm stanchions - Enhanced lower leg stiffness with "M" arch design for maximum tire clearance - 15 QR x 110mm Boost axle - FIT GRIP damper with adjustable compression and rebound - FLOAT EVOL air spring

A truly all season, all terrain fork for fat-bikes with maximum tire clearance. This fork utilizes a reversible drop-out chip that adjusts the rake, allowing for multiple wheel sizes. With over 10 years of carbon experience, ENVE is the trusted source for many when it comes to forks. After creating the most innovative rigid mountain fork in the market, we set our sights on fat bike forks. Like all ENVE Forks, the Fat Fork is molded in one-piece from the steerer to the drop-outs and utilizes a reversible chip to adjust for optimized handling with 26 or 27.5-inch wheels. Adding trusted reliability and lightweight design to 5-inches of tire clearance, this is the upgrade to have for your all-season rig. - Material: Carbon - Weight: 748g - Steer Tube length: 350mm - Rake: 42mm, 51mm (adjustable) - Axle To Crown: 488.8mm - Max Rotor Size: 160mm - 203mm - Max Tire Clearance: 5.2-inch - Crown Race Diameter: 1.5-inch - Torque Spec – Steer Tube: 5.5Nm - Torque Spec - Axle: 8Nm

- 35mm chassis at home on the trail - stiff, playful and light, really light - ButterCups block 20% of high frequency “trail chatter”. Limiting these vibrations massively reduces hand and arm fatigue leaving you feeling fresh with more control. - Charger 3 features a new Internal Floating Piston (IFP) design with better fidelity, performance and truly independent adjustments without any "cross talk". - DebonAir+ is built to balance butter-like small bump feel, increased air volume, and higher overall ride height - Ultimate Bushing Package maximizes the fork’s bushing overlap, reducing friction and creating the smoothest ride possible - Pressure Relief Valves eliminate unwanted air pressure build up in the lower leg caused by variations in altitude or temperature. - RockShox premium short fender included

One of the most successful and hard-working RockShox forks of all time capitalizes on the innovations born from SID. It features a chassis that combines classic XC performance with light trail duties, while a Motion Control damper completes the package, making Reba more capable than ever before. Features - New graphics package for a fresh, premium look - Highly tunable Solo Air spring - TwistLoc and OneLoc remote compatible

Cross-country purists… we see you. You're why SID SL Ultimate is the lightest XC fork on the trail. But weight is meaningless without world-class performance and durability. SID SL features a new Charger Race Day 2 Damper that adapts to anything the race course throws at you. - NEW Our lightest 32mm chassis ever. World Cup-proven performance, built for your next podium result. - NEW Longer-travel 110mm option, in case you're feeling extra. - NEW Charger Race Day 2 damper is the lightest damper on the market. This 2P damper features two compression positions: Open or a rock-solid Lock. - NEW Maxima Plush Dynamic Suspension Lube reduces friction and enhances fork performance ride after ride. - NEW Machined crown for lighter weight and greater strength. - NEW Covetable "Blue Crush" signature colorway and Ultimate High Gloss Black, featuring the new lustrous Pearl White graphics package. - DebonAir air spring is tuned specifically to meet the demands of XC and maintains a higher ride height for increased confidence and control.

An entry level fork with the latest features and performance; Judy Silver is built around a brand new chassis derived from the Pike, works with Plus tires up to 2.8 in both the 27.5" and 29" models. Judy Silver features the Motion Control RL damper and is compatible with OneLoc remotes and has Fast Black upper tubes for an all-black look and low friction performance. - 80-120mm travel - External rebound - TurnKey lockout controls - Fast Black upper tubes - Motion Control RL damper - Compatible with OneLoc remote - Solo Air spring

Built for the best riders, ridden on the hardest tracks, ZEB Ultimate rules the world’s toughest enduros. Equipped with the new Charger 3.1 RC2 damper, ZEB gives riders exceptional adjustability for the right balance of comfort, control, and speed. Alongside this flagship damper, the stout 38mm chassis rides on vibration-killing ButterCups and a DebonAir+ spring. The technology you need for the fastest split times, the style you want on the start line: This is ZEB. FEATURES - NEW To meet the demands of the world’s best riders, Charger 3.1 is a brilliant evolution of our proven damper platform. With increased damping range and High Speed Compression, Low Speed Compression, and Low Speed Rebound adjustments, Charger 3.1 smooths out the roughest trails. - NEW Charger 3.1 RC2’s adjustment range is broader—with less compression damping in the LSC open position and additional support in the HSC closed position, you get the traction, control, and comfort you need to charge dicey lines all day. - NEW Ever on the quest to eliminate friction, a new bushing package further reduces friction with an updated process at the factory level to give riders a better feel right out of the box. - ButterCups block 20% of high-frequency “trail chatter”. Limiting these vibrations massively reduces hand and arm fatigue leaving you feeling fresh with more control. - DebonAir+ air spring is built to strike the perfect balance of what riders really want: a butterlike small bump feel, increased air volume to add support throughout the travel, and higher overall ride height for more confidence when things get steep. - Maxima Plush Dynamic Suspension Lube reduces friction, lasts longer, and enhances suspension performance ride after ride. - Bolt-in torque cap adapters now included for use with standard hub end caps. - Lightweight machined and anodized crown for premium looks and durability. - Available in Signature colorways Electric Red, Slab Grey or Ultimate High Gloss Black. - Ultra-low friction SKF wiper seals provide long lasting fork performance and improve overall suspension feel. - Short fender compatibility. (RockShox fender included)

Premium performance at down-to-earth prices. Judy now includes all of the 30mm MTB and E-MTB forks, with axle and steerer options to match any spec. Gold level gives you aluminum upper tubes and Motion Control damping. Features - New graphics package with E-MTB endorsement option (15x110mm) - Motion Control damping featuring low-speed compression adjustment to lockout - Fits Tires up to 2.8" - Fast Black finished 30mm aluminum upper tubes couple stiffness and lightweight with a premium look - Highly tunable Solo Air spring

The most versatile fork in our lineup, Lyrik harmonizes descending power with effortless efficiency. Lyrik’s legendary performance enters a new era with the Charger 3.1 RC2 damper that offers a wider tunable range of adjustments for the perfect suspension action. Lyrik Ultimate packs an orchestra of industry-leading tech like the ButterCups technology and a DebonAir+ air spring in a stout 35mm chassis. Now better than ever, Lyrik is ready to push your limits. FEATURES - NEW To meet the demands of the world’s best riders, Charger 3.1 is a brilliant evolution of our proven damper platform. With increased damping range and High Speed Compression, Low Speed Compression, and Low Speed Rebound adjustments, Charger 3.1 smooths out the roughest trails. - NEW Charger 3.1 RC2’s adjustment range is broader—with less compression damping in the LSC open position and additional support in the HSC closed position, you get the traction, control, and comfort you need to charge dicey lines all day. - NEW Ever on the quest to eliminate friction, a new bushing package further reduces friction with an updated process at the factory level to give riders a better feel right out of the box. - ButterCups block 20% of high-frequency “trail chatter”. Limiting these vibrations massively reduces hand and arm fatigue leaving you feeling fresh with more control. - DebonAir+ air spring is built to strike the perfect balance of what riders really want: a butterlike small bump feel, increased air volume to add support throughout the travel, and higher overall ride height for more confidence when things get steep. - Maxima Plush Dynamic Suspension Lube reduces friction, lasts longer, and enhances suspension performance ride after ride. - Bolt-in torque cap adapters now included for use with standard hub end caps. - Lightweight machined and anodized crown for premium looks and durability. - Available in the Signature colorway Heavy Meadow Green or Ultimate High Gloss Black. - Ultra-low friction SKF wiper seals provide long lasting fork performance and improve overall suspension feel. - Short fender compatibility. (RockShox fender included)

Cross-country purists… we see you. You're why SID SL Ultimate is the lightest XC fork on the trail. But weight is meaningless without world-class performance and durability. SID SL features a new Charger Race Day 2 Damper that adapts to anything the race course throws at you. - NEW Our lightest 32mm chassis ever. World Cup-proven performance, built for your next podium result. - NEW Longer-travel 110mm option, in case you're feeling extra. - NEW Charger Race Day 2 damper is the lightest damper on the market. This 2P damper features two compression positions: Open or a rock-solid Lock. - NEW Maxima Plush Dynamic Suspension Lube reduces friction and enhances fork performance ride after ride. - NEW Machined crown for lighter weight and greater strength. - NEW Covetable "Blue Crush" signature colorway and Ultimate High Gloss Black, featuring the new lustrous Pearl White graphics package. - DebonAir air spring is tuned specifically to meet the demands of XC and maintains a higher ride height for increased confidence and control.

Redesigned by the world’s fastest racers, for the world’s fastest racers, you want BoXXer in your corner. The all-new 38mm chassis is equipped with the DebonAir+ twin tube air spring that will have you thinking it’s a coil. Paired with a Charger 3 RC2 damper tuned for downhill speed, BoXXer Ultimate takes you straight to the top step of the podium. And with our new crown adjustment lines, setup is a breeze—no rulers required. FEATURES - 38mm chassis designed to meet the needs of the world’s fastest racers with balanced stiffness and ride quality - DebonAir+ twin tube air spring strikes the perfect balance between butter-smooth small bump feel, added support throughout the travel, and taller ride height for confidence when things get steep - Signature colorway BoXXer Electric Red with an all-new graphics package - RockShox premium fender compatibility (RockShox Bolt-On Fender included with purchase) - Lightweight machined and anodized crown for premium looks and durability - Crown height gradient creates a visual guide to simplify setup, no ruler required - Charger 3 damper tuned for BoXXer’s updated chassis and spring. Featuring High Speed Compression, Low Speed Compression, and a revamped Low Speed Rebound, every click is meaningful and exact. This allows the rider to tune to perfection with every click. - ButterCups block 20% of high-frequency “trail chatter” to reduce hand and arm fatigue, leaving you feeling fresh with more control - Ultra-low-friction SKF wiper seals provide long-lasting fork performance and improve overall suspension feel - Maxima Plush damping fluid reduces friction and silences damper noise - Maxima Plush Dynamic Suspension Lube reduces friction, lasts longer, and enhances suspension performance ride after ride

- 35mm chassis with a focused all-mountain mindset - satisfyingly stiff, efficient and designed to eliminate as much weight as possible. - Charger RC damper featuring Low Speed Compression adjust - DebonAir+ is built to strike the perfect balance of what riders really want: butter-like small bump feel, increased air volume to add support throughout the travel and higher overall ride height for more confidence when things get steep. - RockShox premium short fender included - Maxima Plush damping fluid reduces friction and silences damper noise

With optimized material concentrated at the brace and seal area, outstanding stiffness and steering precision, and new E-MTB configured fork options with fender mounting points, Recon Silver is an all-around performer suited for any MTB or E-MTB bike. Features - New E-MTB endorsement options with fender mounts are appropriate for all E-bikes (15x110mm version) - New graphics are easy to read and make a fresh impact - Motion Control damping featuring low-speed compression adjustment to lockout - Fit Tires up to 2.8" (15x110mm version without fenders; the use of a full fender will reduce tire clearance) - Fast Black finished 32mm steel upper tubes couple stiffness with a premium look

Own the mountain with the award-winning 36 Factory, featuring high- and low-speed rebound adjuster, improved compression damping and reduced friction for unmatched performance and adjustability. - Genuine Kashima Coating on upper tubes - FIT damper and FLOAT EVOL air spring - Low friction seals for improved performance - Lower Leg Bleeders and Bypass Channels - Floating axles for perfect alignment - Updated Crown Design saves up to 20 grams, and offers significant structural improvements

- 35mm chassis with a focused all-mountain mindset - satisfyingly stiff, efficient and designed to eliminate as much weight as possible. - ButterCups block 20% of high frequency "trail chatter". Limiting these vibrations massively reduces hand and arm fatigue leaving you feeling fresh with more control. - Charger 3 features a new Internal Floating Piston (IFP) design with better fidelity, performance and truly independent adjustments without any "cross talk". - DebonAir+ is built to balance butter-like small bump feel, increased air volume, and higher overall ride height - Ultimate Bushing Package maximizes the fork's bushing overlap, reducing friction and creating the smoothest ride possible - Pressure Relief Valves eliminate unwanted air pressure build up in the lower leg caused by variations in altitude or temperature. - RockShox premium short fender included

- 38mm chassis for increased stiffness and rider confidence - ButterCups block 20% of high frequency "trail chatter". Limiting these vibrations massively reduces hand and arm fatigue leaving you feeling fresh with more control. - Charger 3 features a completely new Internal Floating Piston (IFP) design with better fidelity, performance and truly independent adjustments without any "cross talk". - DebonAir+ is built to strike the perfect balance of what riders really want: butter-like small bump feel, increased air volume, and higher overall ride height. - Ultimate Bushing Package maximizes the fork's bushing overlap, reducing friction and creating the smoothest ride possible - Pressure Relief Valves eliminate unwanted air pressure build up in the lower leg caused by variations in altitude or temperature - Includes premium short fender

Featuring 37mm stanchions and our Reverse Arch design the Mezzer Pro is the stiffest Enduro fork on the market… it’s also the lightest. How did we manage to accomplish this you ask? Well, it’s not hollow if that’s what you're wondering. In fact, this fork is loaded with technologies such as a fully sealed MC² damper, our proven Dorado air spring, and the life-changing IRT volume adjuster. What does all this mean? It means you no longer need to pick two, you can have the lightest, stiffest, and incredibly adjustable fork all at once. Key Features: - 37mm stanchions, Reverse Arch design, and Hexlock SL2 axle combined together result in ultimate stiffness - Originally developed for the Dorado down-hill fork, the Dorado Air Spring offers ultimate sensitivity featuring a self-equalizing negative air spring. When inflating the fork both the positive and negative air chambers are filled simultaneously equalizing the pressures to create an incredibly supple feel - IRT (Infinite Rate Tune) volume adjuster allows control over the mid-stroke support and bottom-out progressivity independent from the initial spring rate to independently tune small bump sensitivity and big-hit performance - Sealed MC² damper provides a range of blow-off thresholds to satisfy any requirement with separate high-speed and low-speed adjustments. Utilizing a bladder, our new sealed cartridge maintains damping consistency in the most severe riding conditions. •140mm to 180mm internally adjustable travel in 10mm increments (travel spacers included) •27.5” and 29” wheels •Integrated flexible fender can be installed/removed by three small screws threaded into the arch of the fork Product Details: - 37mm stanchions Reverse-Arch design and Hexlock SL2 axle for the ultimate stiffness - Fully adjustable IRT air spring to fine-tune ride feel - Sealed MC2 damper provides a range of blow-off thresholds to satisfy any requirement with separate high-speed and low-speed adjustments - 140mm to 180mm internally adjustable travel in 10mm increments (travel spacers included) - Integrated flexible fender can be installed/removed by three small screws threaded into the arch of the fork

Featuring 37mm stanchions and our Reverse Arch design the Mezzer Pro is the stiffest Enduro fork on the market… it’s also the lightest. How did we manage to accomplish this you ask? Well, it’s not hollow if that’s what you're wondering. In fact, this fork is loaded with technologies such as a fully sealed MC² damper, our proven Dorado air spring, and the life-changing IRT volume adjuster. What does all this mean? It means you no longer need to pick two, you can have the lightest, stiffest, and incredibly adjustable fork all at once. Key Features: - 37mm stanchions, Reverse Arch design, and Hexlock SL2 axle combined together result in ultimate stiffness - Originally developed for the Dorado down-hill fork, the Dorado Air Spring offers ultimate sensitivity featuring a self-equalizing negative air spring. When inflating the fork both the positive and negative air chambers are filled simultaneously equalizing the pressures to create an incredibly supple feel - IRT (Infinite Rate Tune) volume adjuster allows control over the mid-stroke support and bottom-out progressivity independent from the initial spring rate to independently tune small bump sensitivity and big-hit performance - Sealed MC² damper provides a range of blow-off thresholds to satisfy any requirement with separate high-speed and low-speed adjustments. Utilizing a bladder, our new sealed cartridge maintains damping consistency in the most severe riding conditions. - 140mm to 180mm internally adjustable travel in 10mm increments (travel spacers included) - 27.5” and 29” wheels - Integrated flexible fender can be installed/removed by three small screws threaded into the arch of the fork Product Details: - MC² bladder cartridge damper offers adjustable high-speed compression damping, low-speed compression damping - Expansion bladder with patent-pending blow-off valve compensates for oil displacement, with lower friction than a traditional internal floating piston - 37mm chassis with torsional stiffness up to 30% higher than similar forks from competitors - Dorado Air spring features an enlarged negative air chamber for linear initial stroke and reduced IRT volume for progressive end stroke - Internally adjustable travel from 180mm to 140mm

Rebirth of an Icon. The R7 has a vast history of combining a lightweight chassis with performance and reliability. And this latest incarnation of the icon is no different. The new R7 expert pairs superior damping thanks to our 3-position dual piston VTT damper with a lightweight and stiff 32mm chassis. - VTT damper with compression open mode and rebound adjustability - 32mm black anodized 6000 series aluminum stanchions with Reverse-Arch design - Internally adjustable from 120 to 80mm in 10mm increments - Available in two different offsets 44 or 51mm

- 35mm chassis at home on the trail - stiff, playful, and light, really light - Charger RC damper featuring Low Speed Compression adjust - DebonAir+ is built to strike the perfect balance of what riders really want: butter-like small bump feel, increased air volume to add support throughout the travel and higher overall ride height for more confidence when things get steep. - RockShox premium short fender included - Maxima Plush damping fluid reduces friction and silences damper noise

The ZEB Select is packed with performance in a stout 38mm chassis and features the updated DebonAir air spring with the trusted Charger RC damper. SKF wiper seals and Maxima Plush fluid reduce friction, silence noise, and provide all-around lasting performance anywhere you need it to be. - New, 38mm chassis for increased stiffness and rider confidence - Updated, highly tunable DebonAir spring offers a buttery-smooth feel off the top and maintains a higher ride height for increased confidence in steep terrain - Charger RC damper features low-speed compression adjustment - Dual Position Air adjustment option to change the geometry of the bike for climbs and descents - Ultra-low-friction SKF wiper seals provide long-lasting fork performance and improve overall suspension feel - Maxima Plush damping fluid reduces friction and silences damper noise

Own the mountain with the award-winning 36 Factory, featuring high- and low-speed rebound adjuster, improved compression damping and reduced friction for unmatched performance and adjustability. - Genuine Kashima Coating on upper tubes - FIT damper and FLOAT EVOL air spring - Low friction seals for improved performance - Lower Leg Bleeders and Bypass Channels - Floating axles for perfect alignment

With optimized material concentrated at the brace and seal area, outstanding stiffness and steering precision, Recon Silver is an all-around performer suited for any MTB. Features - New graphics are easy to read and make a fresh impact - Motion Control damping featuring low-speed compression adjustment to lockout - Fast Black finished 32mm steel upper tubes couple stiffness with a premium look - Includes Right OneLoc Remote

Riders have been asking for it, and Marzocchi heard the call and has proudly delivered. The new Z1 Coil builds on the legacy of the single-crown fork that started the revolution way back in the '90s – the O.G. Bomber Z1 Coil. Starting with the stout and proven 36mm chassis of the modern day Bomber Z1, the new Z1 Coil retains the renowned Grip damper but swaps out the air spring assembly for the most advanced coil spring system Marzocchi has ever made. At the heart of this new coil system is an ultra-lightweight tempered silicon-chromium steel spring (available in 4 spring rates to suit a wide range of riders) coupled with a noise management system for near silent performance, an integrated air assist for progressivity and bottom-out control, and an external preload adjuster to dial in sag and firmness off the top. Travel can easily be changed in 10mm increments from 150-180mm (depending on wheel size) via included reconfigurable internal spacers. - Ultra-lightweight tempered silicon-chromium steel spring (Medium Spring included) - Noise management system for near silent performance - Integrated air assist for progressivity and bottom-out control - External preload adjuster to dial-in sag and firmness off the top - Travel can easily be changed in 10mm increments from 150-180mm (depending on wheel size) via included reconfigurable internal spacers - Additional springs sold separately to fine-tune and adjust for rider preference - Rake: 44mm

The 38 Performance Series forks retain the same black anodized 7000 series aluminum upper tubes as Performance Elite, except paired with a GRIP damper. Push-button bleeders are not included but can be purchased separately. - Black anodized upper tubes - FIT GRIP damper and FLOAT EVOL air spring - Three on-the-fly compression damping positions: Open, Medium, Firm - Performance Series black-on-black graphics package

The award-winning 36 with FIT GRIP2 4-way adjustable damper features patent-pending Variable Valve Control (VVC) high- and low-speed rebound adjuster, improved compression damping, and less friction overall. With all this and the legendary Fox feel, the 36 offers a level of performance and adjustability sought by today's riders. "Factory" says it all. The best-of-the-best technology we have to offer is available in our Factory Series models with our buttery smooth and ultra durable Genuine Kashima Coat. These products are World Cup proven. Buttery smooth Kashima's distinctive gold color is backed by its high performance attributes—properties that provide an exceptionally smooth feel and extreme durability. GRIP2 — Next-Generation Sealed Cartridge FIT Damper GRIP2 is our next-evolution sealed cartridge FIT system, our highest performing gravity-focused damper. The new damper shares its roots with the original GRIP architecture, but has been seriously enhanced with all-new technology: 4-way adjustability, VVC high-speed rebound circuit, high-performance mid-valve, and overall friction-reducing treatments. EVOL — Air Transfer Port System Our EVOL linear spring curve gives forks and shocks plushness off the top, extra mid-stroke support, and more tunable bottom-out progression, allowing riders to tap into the ideal pairing of front and rear-end feel. FLOAT EVOL Air Spring EVOL technology from rear shocks is integrated into all FOX forks. EVOL increases negative air spring volume, specifically positioned and sized for optimum small bump sensitivity.

Service your suspension fork with Enduro Seal KIts. - Custom made for each make and model of fork