Add a rack to your frame, even if you don’t have rack mounts. Allows standard rack stays to be bolted directly to the seat collar, for a clean and simple look. Made from lightweight aluminum for durability, with threaded inserts to bolt the stays directly into the seat clamp. - 35mm inner diameter fits all alloy Specialized MTB frame designs with 30.9mm posts and 35mm O.D. seat tubes. - 37mm inner diameter fits all carbon Specialized MTB frame designs with 30.9mm posts and 37mm O.D. seat tubes.

This is the correct plug-and-play wire for Shimano's E-Tube Di2 electric-shifting systems. It comes in sixteen different lengths, so choose the one(s) that's right for your Di2 E-Tube wiring configuration.

If you put in a lot of miles and/or sweat a lot, your shifter hoods probably need freshening up. Grab a pair of Shimano Di2 STI Lever Hoods to make your bike feel new again. - Fits Dura-Ace ST-9150 Di2 levers

The Universal Derailleur Hanger consolidates thousands of hanger options across the industry. It protects your derailleur against chain jams by pivoting back and out of the way, and slips slightly when encountering impacts. It improves shifting performance, guarantees better alignment, and works with all drivetrains. Plus, if you ever need replacement, it will be available everywhere. The UDH: one hard-working hanger. - The Universal Derailleur Hanger—or UDH—consolidates thousands of mountain bike derailleur standards. - It offers unparalleled derailleur protection and perfect alignment, guaranteed. - The UDH is designed to rotate rearward in the event of impact and features the ability to "re-rail" the chain back onto the small cog. - The UDH works with all commercially available MTB and E-MTB drivetrains from Shimano to Box to Sunrace.

Converts CenterLock hubs to accept 6-bolt rotors - Available for standard Quick Release as well as Thru-Axle hubs - Extruded alloy collar with CNC shoulder pins and lock ring - Eliminates the need for rotor bolts

- 3-piece expander design provides a secure fit within carbon steerer tubes - 22-25mm range of expansion - Extra-long 90mm height reinforces carbon steerer tube beneath the stem - New design evenly distributes headset compression forces - Lightweight AL6061 alloy construction - Top cap and bolt not included - 1-1/8-inch steerer diameter

Origin-8's Quill Adapter allows you to use modern threadless stems on bicycles with threaded forks that take quill stems (stems with bolts in the center). The Quill Adapter is made of light and durable 7075 aluminum and features a chromoly bolt.

- Converts CenterLock road hubs to accept 6-bolt rotors - Low-profile design for road disc applications - Compatible with standard Quick Release as well as Thru-Axle road hubs - Extruded alloy collar with CNC shoulder pins and lock ring - Eliminates the need for rotor bolts

- Underbar dropper remote, ideal for bikes with 1x drivetrain - Split clamp allows 4-axis of adjustment for perfect setup - Upgrades all remote Kind Shocks (not intended for lever adjustable models and not compatible with first generation LEV Integra)

- Allows quick chain removal without tools - MissingLink 410HD|~|1sp|~|BMX Heavy Duty chain|~|9.4mm|~|each|~| - MissingLink 410|~|1sp|~|BMX|~|8.6mm|~|each|~| - MissingLink II|~|8sp|~|all|~|7.1mm|~|6/card|~| - MissingLink-9|~|9sp|~|all|~|6.6mm|~|6/card|~| - MissingLink-10R|~|10sp|~|KMC, Shimano, SRAM|~|5.9mm|~|6/card|~| - MissingLink-10CR|~|10sp|~|Campagnolo only|~|5.9mm|~|6/card|~| - MissingLink-11|~|11sp|~|Campy, KMC, Shimano|~|5.5mm|~|6/card|~|

In true DEITY fashion, the Crosshair Headset Cap exemplifies the style and detail you've come to expect from everything DEITY offers. We've included 3mm, 5mm, and 8mm spacers that are color-matched to create a clean refined option to finish off your cockpit. Not only are the cap and spacers machined from 6061 Aluminum, the bolt is CNC Machined from 7075 Aluminum to give you a precise and extremely durable centerpiece that is truly hassle-free. - Complete Aluminum 1 1/8" Headset Cap Kit - Features 7075 T6 Machined Aluminum Bolt - Includes 3mm, 5mm, and 8mm Spacers - Spacers Feature a Thin Profile For a Minimalist Style - Countersunk Bolt Design - Kit Includes the Star Nut - Weight: 13 grams (without star nut)

The absoluteBLACK's HOLLOWcage® Oversized Derailleur Pulley Cage for Shimano 9100 / 8000 features a revolutionary mono-plate design to provide quiet and precise shifting. - Designed for use with Shimano Dura Ace 9100 / 9150 / 9170 , and Ultegra 8000 / 8050 - Fits up to a 32T cassette - The Silent Xring Pulley dampens the chain impact on the guide pulley teeth, eliminating the engagement noise -Flexible cage design aligns better with the angle of the chain when using the higher gears of the cassette - HOLLOWcage uses abnormally large, bespoke, full ceramic bearings that make the pulleys incredibly stiff for greater shifting precision - Upper pulley features tall teeth to provide improved shifting precision

absoluteBLACK's Chain Catcher is designed to eliminate the possibility of the chain falling in towards the frame when shifting to the inner chainring on uneven road. Chain Catcher is a simple add-on component which improves the overall function of your drive train and protects your valuable frame from dropped chains. Especially recommended for carbon frames. No matter how well you set up the front derailleur with round or oval rings, there is always a possibility that chain may find its way to drop on the frame when you shift quickly from outer ring to inner one. Especially on rough or gravel roads. Mounting the Chain Catcher in front of the front derailleur will prevent such occurrence from happening because the chain will be guided precisely onto the small ring and will not be able to go any further towards the frame. Our Chain Catcher has a conical tapered head, providing an excellent fit to braze-on mounts that are integrated with frame. However, with older frames you may use a clamp braze-on adapter. In such case please ensure that your adapter has a front face also conical (not flat). Unlike the majority of chain catchers on the market, absoluteBLACK's Chain Catcher can be precisely adjusted to ensure only minimal gap is left to the inner chainring for maximum security. - Mass/Size: 11.6g / one size fits all - Compatibility: All braze-on frames and derailleurs. - Adjustability: 6mm chainline adjustment provided on the slot for precise setup - Material: CNC machined 7075 T6 / M5 stainless steel bolt - Finish: type II anodizing

Zipp Speed Weaponry Cartridge Bearings

Zipp Speed Weaponry Cartridge Bearings

- Includes 61903 bearings and one grease syringe - Measurable wattage savings between 1.5 and 9 watts per bearing set, depending on the level and condition of your existing bearings - Note: 88 front and 188v9 rear hubs are on all 2014 and newer Zipp 202, 303, 404, 808 - One kit required for: Zipp 188v9, 30 and 60 rear hubs

- Includes 61803 (1) and 61903 (1) bearings and one grease syringe - Measurable wattage savings between 1.5 and 9 watts per bearing set, depending on the level and condition of your existing bearings - Note: 88 front and 188v9 rear hubs are on all 2014 and newer Zipp 202, 303, 404, 808 - One kit required for: Zipp Super-9, 900 tubular and Sub-9 disc rear hubs

- Includes 61903 bearings and one grease syringe - Measurable wattage savings between 1.5 and 9 watts per bearing set, depending on the level and condition of your existing bearings

- Includes 61803 bearings and one grease syringe - Measurable wattage savings between 1.5 and 9 watts per bearing set, depending on the level and condition of your existing bearings - These 61803 bearings are not interchangable with the 88/188 hub 61803 bearings

Designed for use with the Zipp SL Speed Seatpost; an internal mount to hold a Shimano DI2 seatpost battery. - Mount compatible only with B1 SL Speed seatpost - Weight: 18g for 27.2mm, 19g for 31.6mm

Zipp Speed Weaponry Bolt Kits

Zipp Speed Weaponry Vuka Aero Center Cap Kit - Bolt kit sold separately

Zipp Speed Weaponry Vuka / Stealth Riser Kit - Bolt kits sold separately

- Elbow pads embossed with Zipp brand logo - Includes 2 foam pads, 2 velcro, and 2 base plates - This may be used with the older Vuka Clip - Bolts are NOT included and the bolt kit varies with clip type

Zipp developed an extensive line of aluminum aerobar extensions to provide the perfect fit for any rider, regardless of size or riding position. Vuka extensions are designed to deliver improved aerodynamics by placing hands closer together and nearer to the rider’s head to start airflow over the rider sooner. Designed with input from top bike fitters, the shape of the Vuka Alumina Evo is crafted to feel as if the rider is shaking hands with the bar. This is achieved through the use of a multi-radius bend paired with a 20mm inward roll of the bar that can be adjusted to dial in fit and achieve an ideal position. - Clean internal cable routing for easy installation - Length: 360mm

Zipp developed an extensive line of aluminum aerobar extensions to provide the perfect fit for any rider, regardless of size or riding position. The Vuka Alumina Extensions offer three different bends to achieve your ideal fit. - Vuka Alumina Race feature 52mm of rise (175g). The Vuka Race bend places the wrists at a more natural bend to help riders remain in their tuck to optimize aerodynamics. - Vuka Alumina Evo are available with a 70mm (176g) or 110mm (180g) rise. Designed to deliver improved aerodynamics by placing hands closer together and nearer to the rider’s head to start airflow over the rider sooner.

Zipp developed an extensive line of aluminum aerobar extensions to provide the perfect fit for any rider, regardless of size or riding position. Vuka extensions are designed to deliver improved aerodynamics by placing hands closer together and nearer to the rider’s head to start airflow over the rider sooner. Vuka Alumina Race Extensions feature 52mm of rise, along with a bend that places the wrists at a more natural bend to help riders remain in their tuck to optimize aerodynamics. - Clean internal cable routing for easy installation

Bolt kit for Vuka Alumina Riser

The perfect bike fit needs to blend slippery aerodynamics and a comfortable, stress-free body position while optimizing control over the bike. Top fitters are constantly devising new methods to maximize and balance these goals. Designed using feedback from top fitters, Zipp’s Vuka Carbon Extensions give you all the options needed to optimize your position and go for the win or your personal best: Vuka Carbon Evo extensions decrease drag by starting airflow over the body sooner while keeping the arms and wrists in a comfortable, relaxed position. The Evo shape, with a 20mm inward roll and multi-radius bend, is constructed using carbon fiber, allowing for even more complex shaping and lighter weight. - Compatible with all 22.2mm clip-on systems - Material: Unidirectional carbon - Internal cable routing - Length: 380mm

The perfect bike fit needs to blend slippery aerodynamics and a comfortable, stress-free body position while optimizing control over the bike. Top fitters are constantly devising new methods to maximize and balance these goals. Designed using feedback from top fitters, Zipp’s Vuka Carbon Extensions give you all the options needed to optimize your position and go for the win or your personal best: Vuka Carbon Evo 70 and 110 extensions Vuka Evo extensions decrease drag by starting airflow over the body sooner while keeping the arms and wrists in a comfortable, relaxed position. The Evo shape, with a 20mm inward roll and multi-radius bend, is now available for the first time in carbon, allowing for even more complex shaping and lighter weight. Vuka Race Carbon Extension The Vuka Race Carbon Extension was designed using data compiled from thousands of fit sessions with recreational and professional cyclists and triathletes by the world’s best fitters. The Vuka Race bend places the wrists at a more natural bend to help riders remain in their tuck to optimize aerodynamics. - Compatible with Vuka Clip, Vuka Aero and all 22.2 systems - Internal cable routing