36 / 52 teeth, DUB, without bottom bracket, 11-/10-speed compatible, carbon crank arms, aluminum chainrings, 5-arm, 110 mm bolt circle diameter, Bluetooth and ANT+ wireless technology, IPX7 water protection, accuracy: +/- 1.5%, dual-sided measurement, MagicZero for automatic calibration, tool-free battery change (CR2032) Number of chainrings 2 Type Article main color black Large chainring 52 T. Small chainring 36 T. Crank length 170.00 mm Secondary color grey System compatibility 10-speed, 11-speed Bottom bracket DUB Variation Chainset