Otufan 172.5mm Bicycle Chainring Crankset,42T CNC Precision Milling Hollow Integrated Chainring Bike Cranksets for 10/11 Speed Road Bikes Mountain BKE MTB RidingSpecification:Item Type:Bicycle Chainring CranksetMaterial: Aluminum alloyGross Weight: 1032g/36.4ozCrank Length: 172.5mm/6.8inShaft Length: 113mm/4.5inShaft Outer Diameter: 24mm/0.94inAppl..

Otufan Bike Speed Freewheel,13-32T Steel 9 Speed Teeth Hollow Rotary Bike Freewheel Compatible with High Precision Tooth Profile for Road Mountain Bike Cycling MTB Replacement PartSpecification:Item Type: 9 Speed FreewheelMaterial: High Strength SteelProduct Speed: 9 SpeedColor: As Pictures ShownWeight: Approx. 581g / 20.5oz9 Speed Teeth Number: 13..