Shimano Announces 10 Speed Groupsets

Shimano have announced their 2x10 and 3x10 groupsets at Sea Otter, and like SRAM, they'll be wearing familiar names, SLX and XT. A big difference however is that Shimano have not announced complimentary components such as hubs, brakes etc, it's all about the drive chain.

The new 10 speed components will be identified by the Dyna-Sys logo.

Completely new drivetrain:
Shimano has changed the standard set-up of the drivetrain to increase the efficiency and achieve a remarkable stability. The current standard set up is 44-32-22 teeth chain rings combined with 9-speed cassette sprockets. This will change to 42-32-24 teeth chain rings combined with 10-speed cassette sprockets.

The advantages of a closer ratio front drivetrain with wider range cassette sprockets:

Increased efficiency:
A wider range 10-speed HG cassette means riders can spend more time in the 32T middle chain ring. And when they do have to drop to the granny, it’s a smoother, faster shift thanks to the more useable 24T inner chain ring. Also the 42T big-ring is easier to ride and smoother to get into so riders will use it more.
Traditionally, riders have had to get used to making two or three recovery shifts in the rear every time they drop into the 22T granny. With Dyna-Sys, it’s just one recovery shift and it’s needed less often.
Dyna-Sys makes shifting to the granny a seamless transition, letting riders deliver consistent, efficient power while maintaining cadence.

Remarkable stability:
An all-new directional mountain bike specific 10-speed chain means smoother shifts, lighter weight and greater overall performance.
Closer gear ratios mean smaller jumps in between gears, more efficient chain movement and less chance of dropping a chain in rough conditions.
Tighter cable routing and shorter rear derailleur housing make the system less prone to contamination, trail chatter or suspension movement.

Again, like SRAM, no announcements on pricing or availability for New Zealand.

Source: Shimano

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