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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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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Shimano's groupsets often often miss call-outs for European elegance or relentless pursuit of weight loss at all cost and innovation for innovation's sake, instead earning their loyal following through the incredible dependability and meticulous engineering of the Dura-Ace CS-R9100 11-Speed...

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Of all that can annoy us on a bike, interrupted shifting makes the top of the list. So, it's a good thing that the Dura-Ace CS-R9200 12-Speed Cassette is here to let us push our limits without having to think about our next gear change. Be it climbs, sprints, or all-out descents, this cassette...

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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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As the rest of the industry scrambles to catch up, Shimano's Di2 groupsets continue to set the standard for precise electronic shifting with nearly endless customizability. The release of 9150 is the next evolution of Di2, bringing slightly updated aesthetics and even better shift functionality...

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It's hard to beat that giddy feeling of setting up your ride with Shimano's new Dura-Ace Di2 drivetrain, but there's always been the issue for those of us riding TT or triathlons. There's no question that we don't like opening up our dialed-in aero positioning to brake or shift on the outer bar,...

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If you, like a few of us old souls around the Competitive offices, are holding fast to your belief in the soul of mechanical shifting, Shimano hasn't abandoned you. Though the world may very well be moving towards 100% electronic drivetrains someday in the future, mechanical still makes a hell of...

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Across Dura-Ace 9100, Shimano made subtle, rather than monumental, shifts in design to improve a system that was already pretty damn good. Proving that mechanical drivetrains can--and still should--be improved, Shimano focused most of its attention on the derailleurs, making the biggest changes...

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