The 10 Best Rear Derailleurs
This wiki has been updated 15 times since it was first published in November of 2018. Rear derailleurs are just one component of a bike's groupset, but they make a huge difference in how smoothly and easily your two-wheel ride changes gears, especially when doing so while accelerating or under load. A perfectly engineered model responds immediately as soon as you press on your shifter and can last though years of use without requiring constant tweaking. When users buy our independently chosen editorial recommendations, we may earn commissions to help fund the Wiki.
December 09, 2020:
In the latest update, we upgraded the SRAM X01 to the SRAM XX1 Eagle. The XX1 Eagle is the company's most recent model, featuring a redesigned geometry that cuts down on chain slap and improves chain management. It supports an 11-speed 1x drivetrain, something many mountain bikers are switching to as it's less complicated, more reliable, and better suited for trail riding.
The Campagnolo Veloce was changed to the Campagnolo Centaur, which has many of the same features the company's premium models have. This includes rounded teeth on the lower pulley wheel and long teeth on the upper cog, both of which result in smoother shifting and less noise.
November 26, 2018:
While they may all look relatively similar to the novice, the engineering and construction quality of rear derailleurs can actually make a huge difference in how well your bike shifts between gears. We did our best to include models that function well in a variety of price ranges, as well as units designed for trail and road riding.