• Crank:104 BCD ultralight mountain bike crank, only can be used on Single speed chainring.
• Crank Arm Length: 170mm, Crank weight: 550g, Crank related holes distance: 74mm.
• Chainring:Snail single speed narrow wide teeth chainring, 104BCD, 32/34/36/38T.
• Chainring thickness 4mm (Narrow teeth: 1.9mm, Wide teeth: 3.7mm), Weight: about 45g.
• Note:These crank and chainring are only suitable for single speed. Can not be used on other speed. If you have any problem before or after purchase, feel free to contact us.