Product information:

Material: Aluminum alloy
Style A: A set of ZTTO cranks
Style B: A set of ZTTO crank +32T disc
Style C: A set of ZTTO crank +34T disc
Style D: A set of ZTTO cranks + 36T disc

Crank: 170MM
Crank screw diameter: 15MM
Compatible: single disk, double disk, three disk

Hollow chain ring crank*1