Kid's Mountain Bike Crankset Crank 155/160/165/170/175mm with Chainring 30-38T
Number of teeth: 0mm/3mm/6mm-30/32/34/36/38T. Crank length:155/160/165/170/175mm. Suitable for: mountain bike. Number of teeth: 9-12 speed compatible. Weight:About 558g(160mm) 621g(170mm).