CeramicSpeed's Oversized Pulley Wheel System X makes for a drivetrain and efficiency upgrade worthy of world-class racing. Oversized 14-tooth and 18-tooth upper and lower pully wheels ensure smooth running and are based on high-quality ceramic bearings. It features less friction in comparison to...

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While 1x has pretty much become the go-to drivetrain choice for mountain bikers and is becoming the preferred 'cross and gravel set up too, double chainrings still rule on the road. One reason the front derailleur has fallen out of fashion with the off-road set is the added complexity and...

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We know we can rely on Shimano Di2 for crisp, clean shifting, and now the 105 FD-R7150 Di2 12-Speed Front Derailleur brings that technology to the masses at an approachable price point. This weatherproof front derailleur provides us with ultra-reliable electronic shifting between front rings no...

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12-speed compatible front derailleur with toggle link constructionThe SHIMANO 105 12-speed front derailleur features lighter front shifting, smooth and natural shift action, and SHIMANO toggle link construction with an optimized cage design that is seamlessly compatible with disc brake road bikes.

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Precise, quick-shifting 12-speed road rear derailleurThe SHIMANO 105 12-speed rear derailleur combines the smooth and stable shifting that is a staple of SHIMANO SHADOW RD design with direct mount compatibility and a wider gear range capacity.

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Shimano brings its ultra-reliable electronic shifting to the masses with the 105 RD-R7150 Di2 12-Speed Rear Derailleur. Pulling together all of the features we've come to love from their Dura-Ace and Ultegra Di2 road cycling systems, Shimano has created a low-profile rear derailleur that we can...

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Comfortably smooth and intuitive auto-shifting rear derailleurKeep your focus and enjoy comfortably smooth pedaling with the inspiring and intuitive automatic shifting of the SHIMANO CUES RD-U6070 rear derailleur.

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Over time derailleur pulleys wear out. Either the bearings go bad, or the teeth wear down enough to negatively affect shifting performance. If your bearings are feeling notchy, or the pulley teeth have rounded out, it's in your best interest to replace the pulleys to get the most out of your...

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Aside from some slightly modified aesthetics and a 10g reduction in weight, the Shimano Dura-Ace Di2 FD-R9150 11-Speed Front Derailleur carries over the high functioning precision of its 9070 predecessor. While the new 9150 rear derailler gets all the attention for its mountain-inspired changes,...

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Shimano's new Dura-Ace Di2 RD-R9150 11-Speed Rear Derailleur boasts a sleek profile that practically hides from the wind and finally brings the Synchronized Shift functionality honed in the trail-focused XTR Di2 system onto the road. Enabling Synchronized Shift lets the Di2 system work its magic...

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