MAHLE Smartbike Systems X20 TCS Bottom Bracket PF46 30 With Torque Cadence Sensor MFPN=BB ITA 30MM BB Included No Chainring BCD BB Included No Chainring BCD Direct Mount SRAM Color Natural Carbon Crank Intended Use Mountain Crank Length (mm) 170 Defined Color Black Drivetrain Speeds 12 Number of Chainrings No Rings No Spider Included Pedal Spindle 9 16" Spindle Interface Type SRAM DUB keyword search SRAM XX1 Every wall of the rim is 25 30% thicker in comparison to those of standard rims which are then paired with the proven I Beam center support to ensure no beating was too great for these rims Cadence signal of 40 pulses per revolution top li{margin left:5%