Optimized for electronic shifting and featuring X-Range gearing technology for AXS groups
Features at least five one-tooth jumps for a smoother gear progression
10-tooth start helps provide a wider gearing range
Replacement for BB-ES25, now 25g lighter
Tubular 22mm spindle for Octalink V2 crank arms
More rigid assembly than square taper
Sealed cartridge bearings
Mounting bolts not included
Compatible with EW-SD50 Di2 Wire
Capacity: 500 mAH (± 2000km)
Use with EW-WU101 or SC-MT800 interfaces/junction to gain BlueTooth Smart wireless connectivity for on-the-fly adjustments with smartphones and tablets
