Rear

- CNC'd titanium pulley wheels made in San Diego, California
- Enduro ceramic bearings
- Precision cut from the inside of chainrings to minimize material waste

- CNC'd titanium pulley wheels made in San Diego, California
- Enduro ceramic bearings
- Precision cut from the inside of chainrings to minimize material waste

The Box Four Rear Derailleur is the base of Prime 9 Technology that offers an affordable clutch based 1 by 8-speed derailleur that is simple and light; this makes it a perfect candidate for every entry-level bike that traditionally has a 3 by drive-train that is neither durable nor user friendly.

The Box Three Rear Derailleur simplifies the features found on the Prime 9 Box One and Two rear derailleurs making for a fully featured wallet friendly rear derailleur. Including a Limited Slip Clutch, Sealed bearing pulleys and a solid construction Box Three Rear derailleurs are compatible with 11-46 and 11-50t derailleurs making it one of the most versatile derailleur offerings for Prime 9.

The Box Two Prime 9 Rear Derailleur is very similar to the Box One version however, to be more wallet friendly, it offers a non adjustable Tri-Pack Clutch, bushing pulleys and some muted finishes. Box Two rear derailleurs are still optimized for 11-50t cassettes and offer durability and performance for the most demanding terrain, just at lower price!

The rear derailleur is the defining component of the Centaur groupset. Inheriting many of the technologies used by Campagnolo’s top-of-the-range rear derailleurs, the Centaur offers shifting performance to meet all requirements – even professionals’. The new Campagnolo Centaur rear derailleur has been designed to be compatible with cassettes with up to 32 teeth. With the upper jockey wheel’s longer teeth, the lower wheel’s smoothed teeth, and a long list of performance-oriented technology, the Centaur rear derailleur is the top component in its class – and all at 15 grams lighter than its competitors. - Lightweight technopolymer upper and lower bodies reinforced with glass fiber for reduce weight and increased strength - Features the same shape of Super Record, offering similar shifting performance - Upper pulley wheel with longer teeth for easier rear shifting - Lower pulley wheel with chamfer teeth for increased smoothness - Pulley wheels with bushings - Drivetrain Speeds: 11 - Cage Length: Medium - Chain Wrap Capacity (teeth): 37 teeth - Rear Der/Shifter Compatibility: Campy Centaur/Potenza/Chorus/Record/Super Record 2015+ - Largest Cog: 32

The Campagnolo Chorus 12-speed rear derailleur features 3D Embrace technology and 12-tooth pulley wheels making it suitable for all cassettes as the distance stays optimum on each individual sprocket, regardless of the cassette selected. - Embrace technology not only keeps the rear derailleur vertically aligned in the perfect position for each sprocket, it now makes the upper pulley wheel advance perfectly in the direction the bike is advancing - On rough roads, the spring positioned between the upper body and the pivot absorbs the vibrations, ensuring the chain always rests properly on the sprockets - The pulley wheels on the 12-tooth derailleur cage allow the chain to move more smoothly - The initial position of the rear derailleur can be adjusted to suit any cassette. - The rear derailleur is positioned further back, making it easier to slide the wheel out and replace it - Upper and lower body crafted from technopolymer that is reinforced with long carbon fiber for exceptional durability Specifications: - Largest Cog: 34 - Rear Derailleur Mount Type: 10x1 Standard - Chain Wrap Capacity (teeth): 37 - Cage Length: Medium - Rear Der/Shifter Compatibility: Campy 12-Speed Chorus/Record/Super Record 2019+ - Drivetrain Speeds: 12 - Weight: 240g

The Campagnolo EKAR GT 13-Speed rear derailleur has been designed using Campagnolo experience and inventiveness, developed and perfected in over 90 years of innovation. Technology, design and material have been chosen to satisfy the specific performance needs of all-road and gravel fans by combining rapid, precise and reliable shifting with high chain security, lightness, durability and strength.

• Design of the rear derailleur with medium-length housing is compatible with the different sizes of sprockets on all of the EKAR GT cassette combination options
• Parallelogram’s 2D trajectory is designed specifically for the EKAR GT 1x system so that shifting entails precise mechanical movements for best use of the 13 sprockets
• Carbon fiber-reinforced polyamide and anodized 7075 and 6082 alloys are skillfully combined in the rear derailleur’s body and cage, for the best blend of strength, durability and light weight
• Large high-grade polymer pulley wheels guarantee optimum performance and high chain retention for reliability on whatever terrain you tackle
• Permanently engaged clutch for enhanced chain retention and minimal operational noise, can be locked forward for easy wheel removal
• Stainless steel bolts with special surface treatment are used for strength and long-term resilience in the toughest conditions

The Campagnolo EKAR Rear Derailleur is designed for the 1x13-speed EKARndrivetrain with a gravel-orientated performance & build. - 2D parallelogram trajectory offers precise mechanical movement for 13 sprockets - High grade polymer pulley wheels (12T upper, 14T lower) allow for smooth chain running and secure retention - Carbon fiber-reinforced polyamide and anodized 7075 and 6082 alloys are lightweight, strong, and durable - Stainless steel bolts for strength and long-term resilience on gravel - Includes clutch lock for easy wheel removal Specifications: - Largest Cog: 44 - Rear Derailleur Mount Type: 10x1 Standard - Chain Wrap Capacity (teeth): 34 - Cage Length: Medium - Rear Der/Shifter Compatibility: Campy EKAR - Drivetrain Speeds: 13 - Weight: 275g

The Super Record 12-Speed rear derailleur combines the highest quality materials for exceptional weight and unparalleled performance. The unidirectional carbon fiber front rocker arm reduces weight, with an innovative shape that envelopes the cassette better, thanks to 3D Embrace technology, creating a double effect: allowing the chain to maintain optimum traction at all times, thus increasing the speed, power and precision of shifting. - Carbon fiber-reinforced construction, to increase strength while keeping weight to a minimum - Optimized spring return for constant chain tension - Adjustment of the initial rear derailleur position - Removable pivot on the upper body - Optimized to work with cassettes from 11 to 34 teeth Specifications: - Largest Cog: 34 - Rear Derailleur Mount Type: 10x1 Standard - Chain Wrap Capacity (teeth): 37 - Cage Length: Medium - Rear Der/Shifter Compatibility: Campy 12-Speed Chorus/Record/Super Record 2019+ - Drivetrain Speeds: 12

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

The Super Record S Wireless rear derailleur makes the most of Campagnolo state-of-the-art technology to guarantee maximum shifting performance. Thanks to in-depth technical knowhow, the Campagnolo Super Record S Wireless rear derailleur always recognizes the sprocket being used in order to guarantee maximum shifting accuracy. This perfect alignment also provides the cyclist with the best power transfer and reduced chain wear. Developed with a User-Centric Design in mind, the Super Record S Wireless rear derailleur is teamed with a battery delivering an autonomy of over 750 km (battery sold separate).

• Precise shifting is fluid, efficient and reliable no matter the pedaling conditions
• Thanks to the Position Sensor, the gear positions itself automatically in the best point for the selected sprocket
• Batteries recharge fully in just 60 minutes, with charge levels easily monitored via component LEDs or the MyCampy 3.0 app
• Removable battery is easy to charge thanks to quick-snap magnetic ports (battery sold separate)
• Manual gear UnLock System allows you to move the gear manually to your preferred position in the event of a system malfunction and can also be locked back with the upward shifting lever during use

The Campagnolo Super Record Wireless rear derailleur makes the most of Campagnolo state-of-the-art technology to guarantee maximum shifting performance. Thanks to the total absence of cables, the component is easy to install and simple to maintain. Developed with user-centric design, the Super Record Wireless rear derailleur is teamed with a battery (sold separately) delivering an autonomy of over 750 km. Charging times are also very fast, with the batteries reaching 100% capacity in just 60 minutes. Battery charge level is easy to check, either with the indicator LEDs on the component or with the MyCampy 3.0 app. The use of carbon fiber makes this component lightweight and yet robust, resistant and reliable over time. A single rear derailleur that adapts to all three cassettes available: 10-25, 10-27 and 10-29. Thanks to in-depth technical knowhow, the Campagnolo Super Record Wireless rear derailleur always recognizes under which sprocket it is positioned in order to guarantee maximum shifting accuracy. This perfect alignment also provides the cyclist with optimum energy transfer and reduced tear and wear of the chain.

• Precision shifting is fluid, efficient, and reliable whatever the pedaling conditions
• Removable battery is easy to charge thanks to quick-snap magnetic ports (Battery and charging adaptor sold separately)
• Position sensor ensures the gear always positions itself automatically in the perfect point for the selected sprocket
• UnLock system manual gear unlocking sytem means that, in the event of an anomaly, the gear can be moved manually to the preferred position and can be locked back with the upward shifting lever during use
• Meets the highest international waterproof standards with a rating of IP69K

- Distinctly modern and angular design
- Design brings balance and refinement to the OSPW System allowing it to blend seamlessly into the contemporary design trends of bikes and groupsets
- Injection molded carbon fiber reinforced PA cage offers high levels of strength and durability
- Grade 3 silicon nitride ball bearings are 400% smoother, 128% harder and 58% lighter than standard steel balls normally used in the bicycle industry
- Customizable spring tension settings for optimal setup
- Available with ALPHA disc pulleys featuring ADR bearing protection or alloy 5-spoke pulleys and standard handbuilt CeramicSpeed bearings
- ALPHA disc option available with an oversized logo, designated as Team Edition
- 4-year warranty on 5-Spoke. Lifetime warranty on ALPHA

- Distinctly modern and angular design
- Design brings balance and refinement to the OSPW System allowing it to blend seamlessly into the contemporary design trends of bikes and groupsets
- Injection molded carbon fiber reinforced PA cage offers high levels of strength and durability
- Grade 3 silicon nitride ball bearings are 400% smoother, 128% harder and 58% lighter than standard steel balls normally used in the bicycle industry
- Customizable spring tension settings for optimal setup
- Available with ALPHA disc pulleys featuring ADR bearing protection or alloy 5-spoke pulleys and standard handbuilt CeramicSpeed bearings
- ALPHA disc option available with an oversized logo, designated as Team Edition
- 4-year warranty on 5-Spoke. Lifetime warranty on ALPHA

- Distinctly modern and angular design
- Design brings balance and refinement to the OSPW System allowing it to blend seamlessly into the contemporary design trends of bikes and groupsets
- Injection molded carbon fiber reinforced PA cage offers high levels of strength and durability
- Grade 3 silicon nitride ball bearings are 400% smoother, 128% harder and 58% lighter than standard steel balls normally used in the bicycle industry
- Customizable spring tension settings for optimal setup
- Available with ALPHA disc pulleys featuring ADR bearing protection or alloy 5-spoke pulleys and standard handbuilt CeramicSpeed bearings
- ALPHA disc option available with an oversized logo, designated as Team Edition
- 4-year warranty on 5-Spoke. Lifetime warranty on ALPHA

- Bargain priced tensioner for turning a geared bike into a single speed - Fixed position aluminum arm with quiet rubber sealed bearing pulley - Mounts in place of derailleur

- Lightweight sprung-type chain tensioner replaces derailleur for running a 1-Speed drivetrain on a vertical dropout frame - Variable tension and position (Can be used on rigid frames or suspension frames with varying chain length) - Supplied with 2 springs to provide pull-Up or push-down function - Superlight CNC machined alloy body, pivot bolt and sealed bearing pulley - Steel no-jump guide cage

M21 rear derailleurs are designed to work with 6- and 7-speed Shimano road and mountain shifters. Enjoy the wide variety of bikes you can get going again with M21 rear derailleurs. - Robust composite and steel construction - Compatible with Shimano 6- and 7-speed mountain and road systems - Long cage for double or triple cranksets and 32T max cassette cog - Includes frame hanger attachment for use with older frame designs

M21 rear derailleurs are designed to work with 6- and 7-speed Shimano road and mountain shifters. Enjoy the wide variety of bikes you can get going again with M21 rear derailleurs. - Robust composite and steel construction - Compatible with Shimano 6- and 7-speed mountain and road systems

R-series rear derailleurs are designed to work with 8 and 9-speed Shimano-compatible road shifters. These R8 rear derailleurs have composite and steel parts that weigh more but have the same durability and performance as R9 and R10 derailleurs. - Steel pulley cage for extra durability - Not compatible with Shimano Tiagra 4700 road system - Short cage for double crankset and 28T max cog - Long cage for triple crankset and 28T max cog

M-series rear derailleurs are designed to work with 7, 8, and 9-speed Shimano-compatible mountain and road shifters. Marvo LT rear derailleurs are built with precision rigid aluminum construction. Let these miracle workers get any bike rolling again. - Lightweight aluminum construction - Steel pulley cage for extra chain-rub durability - Compatible with Shimano 7, 8, and 9-speed mountain and road systems

R-series rear derailleurs are designed to work with Shimano-compatible road shifters. These R9 rear derailleurs combine compatibility, weight savings, and a robust design. - Weight-saving aluminum bracket body and outer link - Steel pulley cage for extra chain-rub durability - Compatible with Shimano 9 and 10-speed road systems - Not compatible with Shimano Tiagra 4700 road system - Short cage for double crankset 28T max cog setup - Medium cage for double crankset and 34T max cog - Long cage for triple crankset and 28T max cog

The heart of this microSHIFT Acolyte derailleur is the innovative SpringLock system. By pairing a customized linear rate high tension spring and a dual stage activation mechanism, we’ve developed a system that can provide substantial chain security when you need it and can be turned off when you don’t.  To engage the clutch, turn the engagement bolt clockwise until it clicks. There’s no way to overtighten the bolt. To disengage the clutch for wheel removal, flip the switch. It’s that simple. - Innovative SpringLock chain retention keeps chain in place over rough terrain - Direct path cable routing for smooth and responsive shifting - Compatible with 12-42T and 12-46T 8-speed cassettes - Compatible with Acolyte shifters only

XLE Rear Derailleur for 10-speed Shimano drivetrains - For MEGA Sprockets w/large cog size 36-42T - Compatible with single, double, or triple cranksets - Total Capacity: 47T

Designed with the rider in mind, the ADVENT rear derailleur packs trail-ready features into an attainable wide-range drivetrain system. The derailleur kinematics are precisely tuned to use a more direct cable path, making the shifting feel consistent across the lowest and highest gears, and everything in between. - Clutch provides stronger chain management over rough terrain - Ratchet-and-pawl clutch is easily adjustable and repairable - Direct cable routing for smooth, responsive shifting - Compatible with 11-42T 9-speed cassettes - Compatible with ADVENT shifters only

The microSHIFT Sword rear derailleur for 1x system features a modern and innovative design with elegant mechanical operation. The cage is designed to use with a single chainring and an 11-48t cassette, giving you a wide range and excellent climbing gears. Not only that, but the cage itself is replaceable, so you can repair a damaged cage or even switch to the 2x cage easily. It also features a hidden clutch design with instant engagement and silent operation to keep the chain secure over rough terrain. With the introduction of Igus bushings on the parallelogram, lateral stiffness and longevity are both improved, making shifting snappier and more robust. Even the barrel adjuster is innovative, with an orbital housing stop that rotates by 15 degrees to reduce cable friction from tight housing bends. - Compatible with Sword and Advent X shifters - Compatible with standard 10-speed chains - Silent clutch with instant engagement and integrated switch - Igus bushings for added stiffness - Replaceable cage - Max cassette range of 48t - Orbital barrel adjuster reduces housing bends for less cable friction

The microSHIFT Sword rear derailleur for 2x system features a modern and innovative design with elegant mechanical operation. The cage is designed to use with a double chainring and an 11-38t cassette, giving you a very wide range with excellent climbing gears. Not only that, but the cage itself is replaceable, so you can repair a damaged cage or even switch to the 1x cage easily. It also features a hidden clutch design with instant engagement and silent operation to keep the chain secure over rough terrain. With the introduction of Igus bushings on the parallelogram, lateral stiffness and longevity are both improved, making shifting snappier and more robust. Even the barrel adjuster is innovative, with an orbital housing stop that rotates by 15 degrees to reduce cable friction from tight housing bends. - Compatible with Sword and Advent X shifters - Compatible with standard 10-speed chains - Silent clutch with instant engagement and integrated switch - Igus bushings for added stiffness - Replaceable cage - Max cassette range of 38t - Orbital barrel adjuster reduces housing bends for less cable friction

Replacement pulley set with ceramic bearings. Compatible with 7,8,9, and 10-speed Campagnolo, Shimano, and SRAM drivetrains.

Paul Components Melvin Chain Tensioner. Converts frames for single speed use. Long enough for a Dingle-setup, (2 rings, one cog) 20T max. - The Melvin uses two pulleys, just like a rear derailleur, which gives it 20 teeth of chain wrap - Will work with multiple front chain rings while maintaining proper chain tension - The pulleys are made of extruded and machined aluminum and have sealed bearings for durability - Pulleys are 2.25mm thick at the tooth which fits inside most narrow 6 through 9 speed chains, and the pulley cage is wide enough to allow 1/8? single speed chains as well - Long enough for a Dingle-setup, (2 rings, one cog) 20T max - Do not use with a coaster brake or fixed gear - Includes Paul's own Sealed Bearing Pulleys