Lebycle Bicycle Mtb 7 8 9 10 11 Speed Mtb Road Bike Rear ,6/7/18/21

Maximum number of teeth of compatible flywheel: 32T.Total tooth volume: 37T.(9/7) The maximum total tooth volume of speed: 37T.Features: high strength, silent guide wheel.Note: The transmission must be equipped with the corresponding flywheel and chain (the rear derailleur speed is consistent with the flywheel model and the chain model)Types:A-6/7/18/21Colour:blackMaterial:Plastic steel + PA nylonSize:Weight A : about 254g (6/7/18/21 speed)Package Contents:1 x rear derailleurOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.