43% off Shimano Dura-Ace Di2 R9150 Rear Derailleur


BUY NOW AT £310.99

With a radical new design and loads of tech improvements, this is a brilliant rear mech.

Shimano Dura-Ace R9150 Rear Derailleur
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As roadies, we think it's important to regard change with suspicion. It's why disc brakes have taken so long to be accepted in the pro peloton and we think that some roadies genuinely like being resistant to change. As a result, it's taken us a while to warm to the new Dura-Ace components.

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Thankfully, the aesthetic changes are mechanically very useful. The redesigned cage will take a larger cassette, thus being much more useful to the average rider. The standard rear mech now officially takes a 32T cassette which is much better for tackling steep climbs.

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The Shadow technology results in fewer wrecked derailleurs and actually stops ours being knocked in daily use. It does this by moving the body of the rear mech up under the frame. For Di2, this is especially important as a bump to the rear mech in a crash can put the Di2 system into crash mode. It renders the system unusable until it is reset which can be a real problem if you're stuck in the big ring with hills to get over on the way home.

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This R9150 is the electronic version. You get beautifully crisp and accurate shifting that can integrate into an older system, allowing you to upgrade gradually.

Shimano Dura-Ace R9150 Rear Derailleur
Commerce content is independent of editorial, and Farrelly Atkinson earns commission from promoted products

About Shimano

In February 1921, Shozaburo Shimano opened Shimano Iron Works in Higashi Minato in Sakai City when he was 26 years old. On the site of a demolished celluloid factory, he rented a nearly 40-square-meter area. The monthly rent was 5 yen. At that time, the new establishment had only a single lathe, measuring about 1.8 meters long. Shozaburo Shimano decided to produce freewheels. Of all bicycle components, freewheels entailed the highest level of technology to produce.

Since then, Shimano has released some of our favourite cycling products with the current Ultegra Di2 Disc groupset being our pick of the bunch.

About ChainReactionCycles

The CRC journey began in 1984 as a small family business in Northern Ireland, serving and supporting local cyclists. It’s been an incredible ride so far, with the company growing to a collective of over 450 cyclists, swimmers, runners and passionate professionals supporting a global community of cycle and multisport athletes.

The deals listed on this page are the best deals on the best cycling products we can find. If you purchase anything as a result of clicking on a deal, Farrelly Atkinson Ltd may earn some commission: on some we do, on some we don’t. Any money that we earn goes in to paying for road.cc and its sister sites off.road.cc and ebiketips.