e*thirteen Helix Race Alloy e*spec Crank Arm Set - BOSCH SX-Brose S Mag-TQ HPR50 21.5mm Offset 165mm Self Extractor BLK MFPN=D33XRDR-R An oversized bottom-bracket and chainstay

An oversized bottom-bracket and chainstay area increases pedaling stiffness and drivetrain efficiency

5 hrs (Low-5 lm) and up to 11 hrs (Superflash™-70 lm)

It's been engineered it with the largest cutaway for the greatest relief channel possible remaining supportive and flat at the rear so you have a good platform for sustained seated climbs

The light mounts to the fork crown and delivers 500 lumens of light with a path-friendly horizontal cutoff beam for courteous anti-glare illumination

3'' (800 x 470 x 135mm) Weight: 17

e*thirteen Helix Race Alloy e*spec Crank Arm Set - BOSCH SX-Brose S Mag-TQ HPR50 21.5mm Offset 165mm Self Extractor BLK MFPN=D33XRDR-R An oversized bottom-bracket and chainstayA high performance weight optimized alternative to carbon fiber for riders who prefer alloy cranks. These 24mm ISIS interface cranks are engineered for compatibility with Bosch Gen 4 Brose S Mag TQ HPR 50 Fazua Yamaha Maxon and Specialized Brose motor systems. They come in short lengths starting at 155mm for improved pedal clearance and are tested to E Enduro standards. Color Black Crank Length (mm) 165 Pedal Spindle 9 16" Spindle Interface Type ISIS