Made of high-strength metal, rust-proof, non-deforming, wear-resistant, high durability. High precision thread ensures a tight connection with the bicycle hub and smooth operation. It can promise an even rotation of the chain without much noise. Fast driving speed with less effort. Reliable to use, applicable to mountain bike freewheel.
Specification:
Material: aluminium alloy.
Weight: 383g
Surface treatment: silver chrome treatment
Variable speed: 8 speeds.
Teeth: 11T-28T.
Size: 11.3 x 11.3 cm / 4.4 x 4.4 inches.
Package list:
1 x bicycle free attachment.