It’s possibly the biggest news this year in the world of mountain biking. SRAM has set out its pitch and forsaken the front derailleur for evermore with the launch of its new 12 speed, 10-50t XX1 and X01 Eagle drivetrains.
We attended the launch and spent two days riding the new drivetrain, both in the cross-country racing XX1 Eagle form and the enduro racing and all-mountain oriented X01 Eagle guise.
While that’s nowhere long enough to fully test something as complex as a drivetrain, it was enough time to give you our first thoughts on just how the changes SRAM has made work out on the trail.
More range, more freedom
The first thing that you notice is just how big that 50t cog on the cassette looks on the bike. While the eight-tooth jump from the 11-speed range’s largest 42t cog looks rather large, it’s actually quite in tune with the steps across the rest of the cassette at 19%. In fact, the gear steps from there down are identical to the 11-speed, although the physical spacing of the cogs is actually slightly narrower, the biggest cog sitting slightly more inboard than the 11spd, thanks to a dished shape.
It may look odd now, but we’re pretty sure you’ll be seeing more of these
Smoother and stronger
All working together
You can read more at BikeRadar.com