Parts

Our intention with Reverb AXS was inventive and pure: No hoses. No routing. No energy wasted. Not a single thing in the way of the experience. We created a reliable wireless-electronic dropper post and controller that actuates with drastically less effort and zero distraction. Expanding what's possible on a bike, Reverb AXS is enabled by SRAM AXS technology, a new level of interaction, personalization, and connectivity across all AXS-enabled components. - Effortless Electronic-Wireless actuation and infinite height adjustment with a single touch. - Clean, simple and fast to install. No hoses to route, no fishing required. - Updated internals for faster return speed in all conditions. - New Vent Valve Technology, a simple and reliable built in service solution without disassembly of the seatpost. - SRAM AXS technology, a new level of interaction, personalization, and connectivity across all AXS-enabled components. - Includes RockShox AXS handlebar controller, rechargeable SRAM battery, and charger.

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

If your ride doesn't feel complete until you get a little dirt on your tires, you know the importance of capable components that can tackle anything. The RED XPLR eTap AXS rear derailleur is a dedicated 1x-specific unit designed for use with the XPLR 10-44 cassette. It makes for an uncluttered drivetrain that takes on pavement and singletrack with equal aplomb. Wireless and proven eTap shift logic, AXS connectivity and advanced chain management mean this derailleur does exactly what you want when you need it. - Wireless electronic eTap shift logic for intuitive shifting, easy setup, and reliability - 1x specific for use with 10-44T XPLR and 10-36T cassettes - SRAM AXS enabled, allowing easy personalization - Chain management keeps the drivetrain quiet and secure - Large X-SYNC pulleys for increased durability and efficiency - Compatible with existing eTap batteries - Cage Material (RD): Aluminum - Pulley Bearings Material: Ceramic - Max Tooth: 44 NOTE: Does not include eTap battery. Compatible with existing eTap batteries.

The Campagnolo Super Record EPS 12 speed rear derailleur offers improved shifting performance with a trajectory curve that is optimized for 11-29 and 11-32 cassettes. - Using 3D Embrace technology the inner mechanism embraces more teeth per sprocket thanks to the advanced position of the upper pulley - The 12-tooth pulley wheels allow for the integration of larger cassette range while keeping chain length the same - Upper body adjustments allow you to set the perfect position whether you're riding an 11-29 or 11-32 tooth cassette - An upper body return spring absorbs the energy of any bumps, preserving the hanger, and bringing the derailleur back to position - An aluminum upper body provides high resistance to impacts and greater stiffness - The lower part of the body is made of ultra-light technopolymer, reinforced with long carbon fibers Specifications: - Largest Cog: 32 - Rear Derailleur Mount Type: 10x1 Standard - Chain Wrap Capacity (teeth): 37 - Cage Length: Medium - Rear Der/Shifter Compatibility: Campy Record/Super Record EPS - Drivetrain Speeds: 12 - Weight: 234g

Triathlon. Time Trial. Cyclocross. Some disciplines are made for 1x. And while SRAM's X-Range 2x set up has integrated much of the simplicity of a 1x system, there are still times when a single ring is best. The SRAM RED 1 crankset offers the most demanding racers the right mix of features—aerodynamics, durability, and simplicity. - Single-ring drivetrain simplifies functionality and reduces weight - 48 and 50t variants feature direct mount aero chainrings for better aerodynamics - Non-aero chainrings can be installed with a single tool, making gearing changes a breeze - SRAM X-SYNC wide-tooth, narrow-tooth chainring technology provides maximum chain control - Laser-etched chainring finish is more durable - DUB bottom bracket adds durability and simplicity - Can be upgraded to a power meter - Version: D1

The SRAM RED crankset leverages a pivotal design innovation: smaller chainrings and a wider cassette range. This leads to smoother and faster shifting up front and more useful gearing for today's riders. The new configurations improve cadence and efficiency while also delivering shifts that are crisp, clean and quick-every time. Features - X-Range gearing technology gives you more range and a smoother gear progression, so you're always in the right gear - Improved front shifting performance for crisp and accurate front shifts - Unique chainring design results in a lighter weight, stiffer, more durable crankset - DUB bottom bracket adds durability, simplicity and broad compatibility - Power upgradeable Specifications - Speeds: 12 - BB Compatibility: All SRAM Road DUB BBs, GXP/PF GXP 68mm - Chainring Size: 46/33, 48/35, 50/37 - Crank arm length: 165mm, 167.5mm, 170mm, 172.5mm, 175mm - Chainline: 45.0mm - BB Spindle Interface: 24mm, DUB - Chainring material: Aluminum - Guard: No Guard - Bolt Circle Diameter (BCD): Direct Mount (DM) - Crank arm material: Carbon

The DB Kitsuma shock was designed to be very intuitive and easy to use for the rider, on and off the trail. It boasts a wider range of damping adjustment on the compression circuit and increased range of rebound control over any other major shock on the market today. - Three Position Climb Switch provides three distinct modes, drastically affecting the shock's feel and character. The new three position climb switch retains the "Descend" and patented "CS" mode, while adding a new "Firm" mode - Tool-Free adjustments are ergonomically designed to be easily accessible and adjustable trail-side—giving riders the power of a pro-tune at their fingertips - The rebound range has been shifted downward for more rebound damping to accommodate the larger spring rates needed for more modern bikes

The DB Kitsuma shock was designed to be very intuitive and easy to use for the rider, on and off the trail. It boasts a wider range of damping adjustment on the compression circuit and increased range of rebound control over any other major shock on the market today. - Three Position Climb Switch provides three distinct modes, drastically affecting the shock's feel and character. The new three position climb switch retains the "Descend" and patented "CS" mode, while adding a new "Firm" mode - Tool-Free adjustments are ergonomically designed to be easily accessible and adjustable trail-side—giving riders the power of a pro-tune at their fingertips - The rebound range has been shifted downward for more rebound damping to accommodate the larger spring rates needed for more modern bikes - Trunnion Mount

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

The SRAM RED 1 AXS crankset features exceptional 1x drivetrain design. It provides the simplicity and tighter gearing range that is well-suited for road racing and riding in flatter terrain, where a wide range would go unused. The crankset is designed specifically for electronic shifting and can be upgraded to a power meter. - Single-ring drivetrain simplifies functionality and reduces weight - SRAM X-SYNC wide-tooth, narrow-tooth chainring technology provides maximum chain control

The ZEB is built with a stout, 38mm chassis and features the updated DebonAir spring with the performance of the Charger R damper. SKF wiper seals and Maxima Plush fluid reduce friction, silence noise, and provide all-around lasting performance. - 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 - New, price point Charger R cartridge damper featuring an easy-to-adjust damper with just rebound adjustment - 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

The Campagnolo Super Record EPS Ergopower shift lever features effective ergonomics and the best of Campagnolo's shifting and braking technology. - Campagnolo's Multishifting technology allows you to change several sprockets on the 12-speed cassette with a single shift - When the chain engages immediately, the derailleurs can be actioned with minimum effort and in any position on the handlebars, allowing for quick shifting - The controls offer a stable and safe grip when standing pedaling or when leaning high on the handlebars - Shaped cushioning and an adjustable reach make these controls perfect for any cyclist, regardless of hand or finger size - The flat-mount Campagnolo brake caliper ensures powerful, modular braking in any situation owing to pistons measuring 22mm in diameter - Brake pad return guaranteed by the magnetic system ensures that there is no friction at the time of brake lever release - A special metal plate positioned between the pad and the caliper piston, cushions the vibrations during braking Specifications: - Pad Compound: Semi-Metallic - Brake Caliper Mount: Flat Mount - Brake Lever Use: Right - Hydraulic Fluid Type: Mineral Oil - Front Der/Shifter Compatibility: Campy Record/Super Record EPS - Rear Der/Shifter Compatibility: Campy Record/Super Record EPS - Drivetrain Speeds: 12 - Adjustable Reach: Yes

Rally XC100 is tested to the extreme, so you can ride there too. This single-sensing power meter delivers reliable power measurements and is easy to transfer between bikes, no matter what bike you're on or where you're riding. - Impeccably Designed Pedal—Rally power meters have undergone rigorous testing to increase reliability. Featuring a superior design with sensors housed inside, this pedal installs like any other pedal. And it's quick to transfer between bikes. - Reliable Readings—By reliably measuring your cadence and forces detected on the left pedal, Rally XC100 doubles the value to provide total power. Want more metrics? Upgrade later to the dual-sensing system (sold separately). - Cleat Compatibility—For a comfortable ride, this pedal is designed to fit your favorite Shimano SPD cleats. - Transferable Spindle—From road to gravel to cyclocross and much more, keep riding year-round with a transferable spindle that can be installed in the Rally RS/Rally RK road pedal body kits (each sold separately). - Battery Life—Make sure you're ready for those long rides and training sessions with up to 120 hours of battery life. Specs: - Battery type: LR44/SR44 (x4) - Battery life: up to 120 hours (with LR44 battery type) - Weight: 316g - Water resistance: IPX7 - Max. rider weight: 105kg - Accuracy: +/- 1.0% - Cleat type: Shimano SPD - Q-factor: 53/55mm with supplied spacing washer - Stack height: 13.5mm - Field calibration - Adjustable release tension - Garmin Connect - Measurement location: Spindle - Communication: ANT+ and Bluetooth In the Box: - Rally XC100 pedals - Cleat hardware - 55mm Q-factor washers - Documentation

This is an updated version of the Oversized Pulley Wheel System for Shimano 9100/9150 and 8000 SS/8050 SS. This new design has an integrated stop tower for easier mounting. The CeramicSpeed Oversized Pulley Wheels System has been proven to be the fastest pulley system in the world, providing energy savings starting at 2.4 watts compared to standard Shimano systems. The OSPW System for Shimano 9100/9150 and 8000 SS/8050 SS is an industry-leading product, chosen by many of the world's leading cycling teams and professional triathletes. It features a 13-tooth upper pulley wheel and a 19-tooth lower to provide absolute optimization of the rear derailleur, and these oversized aluminum pulley wheels come fitted with either standard or coated CeramicSpeed Bearings: your choice. The Shimano 9100/8000 OSPW system is compatible up to a 32 tooth cassette for both Dura Ace & Ultegra derailleurs The typical overall power savings of the OSPW System for Shimano 9100/9150/8000 is 30%-60% over a stock setup. The oversized pulley wheels have lifespan that is 3-5 times longer than the commonly used standard pulleys on the market. Please note: The OSPW System for 9100/9150 and 8000 SS/8050 SS is NOT compatible with Ultegra 8000-GS or 8050-GS (medium cage) derailleurs, nor with the clutch-equipped Ultegra RD RX800 & RX805. Choose CeramicSpeed's OSPW X for Shimano RX800/805 for a compatible RX800 & RX805 version. For a compatible upgrade for Ultegra 8000-GS or 8050-GS choose their Pulley Wheels for Shimano, 11s NW. In The Box: - A complete 13-tooth/19-tooth OSPW System - CeramicSpeed Bearing Oil in 15ml dropper bottle

The OSPW X for SRAM Eagle AXS features a narrow wide tooth profile to ensure durable chain retention. The 14-tooth upper and 18-tooth lower pulleys reduce chain drag, while the custom-designed carbon fiber pulley cage ensures both durability and light weight. - Pulley Wheels: CeramicSpeed 14-tooth upper and 18-tooth lower - Pulley Wheel Material: aluminum - Cage Material: Carbon-reinforced PA - Bearing Options: CeramicSpeed Standard or Coated - CeramicSpeed Grease/Oil: Pulley Oil - Compatibility: SRAM Eagle AXS (Electronic) - Compatibility Cassette: 10-52 tooth max - Spring Tension Settings: 3 - Speed: 12-speed - Discipline: Off-road and Gravity In the box: - A complete OSPW X System for SRAM Eagle AXS - CeramicSpeed Bearing Oil in a 15ml dropper bottle

The Beryl is a product aimed at the "set it and forget it" rider. The Beryl features all of the smooth qualities you've grown to expect from DVO in a condensed feature package. - D2 damper provides a 3-position low-speed compression adjuster to quickly go from a climb setting to wide open DH - OTT feature offers 3 settings of small bump compliancy to work with any air pressure or rider weight - Easy access external rebound adjuster provides a wide range to work with

The Campagnolo Super Record EPS 12 speed front derailleur allows for maximum front shifting performance through its inner semi-cage design which helps the chain engage with the chainring. - Designed with a narrower cage for correct coupling with the 12 speed chain - Dedicated positions for each chainring help to avoid any contact between chain and cage, reducing the possibility of dropping the chain. - Derailleur body is crafted from monolithic carbon powder technopolymer for a lightweight and stiff unit Specifications: - Double or Triple: Double - Derailleur Capacity: 16 - Front Der/Shifter Compatibility: Campy Record/Super Record EPS - Front Derailleur Style: Traditional - Front Derailleur Clamp: Braze-on - Drivetrain Speeds: 12 - Weight: 132g

The SRAM RED eTap rear derailleur executes shifts the instant you demand, wirelessly. It's easy to set up, clean in appearance, and delightfully uncomplicated. Mechanical necessities, such as a carbon pulley cage, ceramic pulley bearings, and anodized alloy artfully blend with proprietary electronic advancements to deliver a shifting wonder. - SRAM eTap shift logic and wireless operation - Fits all 11-speed SRAM road cassettes up to 11-32T - 2x and 1x compatible - Updated version of the original SRAM RED eTap rear derailleur - Orbit chain management technology keeps drivetrain quiet and secure - Larger X-SYNC pulleys and ceramic bearings for increased durability and efficiency - NOTE: Does not include eTap battery. Compatible with existing eTap batteries.

- Ergonomic Shifting Operation Without Stress - Shimano Synchronized Shift - Low Profile Rear Derailleur Design - Shimano Shadow Rd - Race Endurance For Less Damage In Crush - Maintains Compact And Smooth Appearance - Maximum Sprocket: 30T - Minimum Sprocket: 11T - Maximum Front Difference: 16T - Total Capacity: 35T

The SRAM RED 1 AXS crankset features exceptional 1x drivetrain design. It provides the simplicity and tighter gearing range that is well-suited for road racing and riding in flatter terrain, where a wide range would go unused. The crankset is designed specifically for electronic shifting and can be upgraded to a power meter. - Single-ring drivetrain simplifies functionality and reduces weight - SRAM X-SYNC wide-tooth, narrow-tooth chainring technology provides maximum chain control

Using the lightest materials available, the DURA-ACE R9150 levers offer better control and confidence in race conditions. The lightweight carbon hood material, enhanced shifter layout, and increased reach adjust range are the culmination of generations of SHIMANO's DI2 refinement. Better control and confidence in race conditions - Dedicated brake lever shape, stroke, contact point, stiffness and dedicated shift paddles Lightweight - Carbon composite plastic material of hood More intuitive, quicker shifting operation - More defined click feeling and ergonomic shifting lever position Customizable function to fit any riding style - Each switch has the option for multi-shift ON or OFF - E-TUBE PROJECT Optimum power transmitted with firm grip - Ideal ergonomic cover shape with better thickness & tenderness

- The stiffest and most aero integrated handlebar and stem system - All carbon construction - Di2 compatible with integrated junction box compartment and wiring conduits - Compact 125mm drop, 80mm reach - 395g

- 4 pistons in the front for maximum braking power - 2 pistons in the rear for perfect modulation - Thanks to the new 1-finger HC Carbon lever blade it just weighs about 230g (average value) - Suitable for mounting left or right - Position: Front and Rear - Hydraulic Hose Length: 2200mm - Fluid: Mineral oil

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

Riding rigid isn’t for everyone, but for those who value functional simplicity, the updated ENVE Mountain Fork delivers. BOOST (15X110MM) - Material: Carbon - Accessory Mounts: Yes - Weight: 719g with Fender, 676g (w/ clasps) - Travel Correction: 120mm (Compatible with frames designed around 100mm-140mm Travel Forks) - Steerer Tube Length: 300mm - Rake: Adjustable – 44mm, 52mm - Axle To Crown: 490mm – 44mm Rake Position; 492mm – 52mm Rake Position - Brake: Disc - Brake Mount: Post Mount - Axle Compatibility: 15 x 110mm - Max Rotor Size: 180mm - Max Tire Clearance: 29 x 3.0” with Fender - Crown Race Diameter: 1.5” - Torque Spec: Steerer Tube: 5.5 Nm - Torque Spec: Axle: 8 Nm

There is beauty in simplicity and it's hard to argue with the simplicity of an unsuspended mountain bike. Despite its uncomplicated nature, ENVE's rigid Mountain Fork is loaded with unique features such as a removable fender, disc brake hose clip, and reversible axle inserts to fine tune the rake of the fork to match your ride preference and application. - Material: Carbon Fiber - Steerer Tube Length: 300mm - Rake: 44, 52 Adjustable - Axle to Crown: 470mm - Brake: Disc - Max Rotor Size: 180mm - Max Tire Clearance: 3.4-inch - Crown Race Diameter: 1.5-inch - Torque Spec: Steer Tube: 5.5 Nm - Torque Spec: Axle: 8Nm - Weight: 711g (w/ fender), 686g (w/ clasps)

Rally RK100 is tested to the extreme, so you can ride there too. This single-sensing power meter delivers reliable power measurements and is easy to transfer between bikes, no matter what bike you're on or where you're riding. - Impeccably Designed Pedal—Rally power meters have undergone rigorous testing to increase reliability. Featuring a superior design with sensors housed inside, this pedal installs like any other pedal. And it's quick to transfer between bikes. - Reliable Readings—By reliably measuring your cadence and forces detected on the left pedal, Rally RK100 doubles the value to provide total power. Want more metrics? Upgrade later to the dual-sensing system (sold separately). - Cleat Compatibility—For a comfortable ride, this pedal is designed to fit your favorite LOOK KEO cleats. - Transferable Spindle—From road to gravel to cyclocross and much more, keep riding year-round with a transferable spindle that can be installed in the Rally RS/Rally RK road pedal body kits (each sold separately). - Battery Life—Make sure you're ready for those long rides and training sessions with up to 120 hours of battery life. Specs: - Battery type: LR44/SR44 (x4) or CR1/3N (x2) - Battery life: up to 120 hours - Maximum rider weight: 105kg - Accuracy: +/- 1% - Field calibration - Adjustable release tension - Measurement location: spindle - Communication: ANT+ and BLUETOOTH - Weight: 334g - Water resistance: IPX7 - Cleat type: KEO - Q-factor: 53mm (55mm with provided 2mm washer) - Stack height: 12.2mm In the Box: - Rally RK100 pedals - Cleat hardware - 55mm Q-factor washers - Documentation

Rally RS100 is tested to the extreme, so you can ride there too. This single-sensing power meter delivers reliable power measurements and is easy to transfer between bikes, no matter what bike you're on or where you're riding. - Impeccably Designed Pedal—Rally power meters have undergone rigorous testing to increase reliability. Featuring a superior design with sensors housed inside, this pedal installs like any other pedal. And it's quick to transfer between bikes. - Reliable Readings—By reliably measuring your cadence and forces detected on the left pedal, Rally RS100 doubles the value to provide total power. Want more metrics? Upgrade later to the dual-sensing system (sold separately). - Cleat Compatibility—For a comfortable ride, this pedal is designed to fit your favorite Shimano SPD-SL cleats. - Transferable Spindle—From road to gravel to cyclocross and much more, keep riding year-round with a transferable spindle that can be installed in the Rally RS/Rally RK road pedal body kits (each sold separately). - Battery Life—Make sure you're ready for those long rides and training sessions with up to 120 hours of battery life. Specs: - Battery type: LR44/SR44 (x4) or CR1/3N (x2) - Battery life: up to 120 hours - Maximum rider weight: 105kg - Accuracy: +/- 1% - Field calibration - Adjustable release tension - Measurement location: spindle - Communication: ANT+ and BLUETOOTH - Weight: 328g - Water resistance: IPX7 - Cleat type: SPD-SL - Q-factor: 53mm (55mm with provided 2mm washer) - Stack height: 12.2mm In the Box: - Rally RS100 pedals - Cleat hardware - 55mm Q-factor washers - Documentation

BREAKTHROUGH POWER Built on the cutting-edge SPEEDPLAY pedal platform, POWRLINK ZERO delivers reliably accurate power and cadence data in a race-proven pedal system. This powerful combination creates an unrivaled power pedal that helps cyclists optimize performance to break through to the next level. A POWERFUL COMBINATION POWRLINK ZERO combines proven sports science and years of industry-leading research with the superior adjustability, increased power transfer, reduced weight, and enhanced aerodynamics of the SPEEDPLAY platform to create a pedal system that delivers a distinct performance advantage. BETTER YOUR BEST Accurate to +/- 1%, POWRLINK ZERO’s internal gyroscope removes cadence variation to measure power output more precisely. Combined with Wahoo’s sports-science based algorithms, cyclists get accurate values they can use to achieve next-level performance gains. LASTING POWER POWRLINK ZERO is made with premium materials for superior strength-to-weight ratio – making it perfect for enduring efforts. In addition, the rechargeable battery lasts up to 75-hours per charge to give you the power to go long. Really long. In the box - Left Power Pedal and Compatible Right Pedal - Washer (x2) - Cleat Assembly - Screw Packet - Charging Cable and Clips - Quick Start Guide - Important Product Information Guide Additional Tools Required for Assembly: #1 and #2 Philips Head Screwdriver and 8mm Allen Wrench"

The new Record 12x2 Speed crankset: a new hole-free design for the right-hand crank that optimizes aerodynamics. The new carbon fiber Record 12x2 Speed crankset with unidirectional finishing guarantees continuity with the finishing of the entire groupset, whilst maintaining the Ultra-Torque bracket system on the steel axle to ensure perfect transmission of power. The new Record 12x2 Speed crankset can be installed on any type of frame, whether or not it is being used with disc brakes because it optimizes the chain line on the frame with a rear hub flange measuring 130, 135 or 142 millimeters without affecting the Q factor that remains constant at 145.5 millimeters. The innovative design of the outer chainring ensures faster, quieter derailing owing to the contoured pin. The symmetrical design of the inner chainring teeth allows improved stability with chain crossovers. The double wheel sizing standards (112 and 145 millimeters) enable reducing the weight through greater use of carbon fiber. There are eight fixing screws for increased structural stiffness. The varying number of pins for each of the three chainring combinations (34/50, 36/52, 39/53) facilitates upshifting due to the optimized free strokes associated with each combination. The special drains on the inside of the outer chainrings optimize performance when downshifting in dead spots.