SRAM X-Sync 2 Eagle Direct Mount Chainring - 30 Tooth 3mm Boost Offset 12-Speed BLK Gold MFPN=RR21BG4DM5536TSHI12BLK BB Included No Chainline/Hub Compatibility

BB Included No Chainline/Hub Compatibility 130 Hubs Chainline/Hub Compatibility 135/142 Road Disc Hubs < 415 mm Chainstay Chainring BCD 110 Color Black Crank Intended Use Cyclocross Crank Length (mm) 170 Defined Color Black Drivetrain Speeds 11 Drivetrain Speeds 10 Number of Chainrings Chain Retaining Single Pedal Spindle 9/16" Rings 42 Spindle Interface Type SRAM/Truvativ GXP

Color Orange Material 6061 Aluminum Defined Color Orange Thickness 1

Keep going strong with up to 1 year of battery life

compatible with rechargeable battery

Truing of 20 mm or other dimension axle wheels requires additional adaptors

SRAM X-Sync 2 Eagle Direct Mount Chainring - 30 Tooth 3mm Boost Offset 12-Speed BLK Gold MFPN=RR21BG4DM5536TSHI12BLK BB Included No Chainline/Hub CompatibilitySRAM X Sync 2 Eagle Direct Mount Chainring 30 Tooth 3mm Boost Offset 12 Speed Black with Gold. Intense study of chain and chainring wear patterns led to the radical tooth profile that lasts longer runs quieter and further improves chain retention. Fully CNC Aluminum ring construction Eagle technology provides an expanded optimum gear range for 1x drivetrains X SYNC 2 chainring design increases chain retention wear life and reduces friction and noise