Features 36 hole drilling. Precision-machined steel bearings provide a , fast . Low-friction seals effectively keep out water, mud and dirt. Quick release lever allows for quick installation and removal. Internal grease sleeves aid in maintenance and extend hub life. Aluminum alloy wheel shell and anodized skewers, easy maintenance and long service life. Compatibility: 5 / 6 / 7 / 8S Swivel Freewheel Color: red Material: aluminum alloy Dimensions: Front opening 100mm, rear opening 135mm Package Contents: 1 x Front hub 1 x rear hub Only the above package content, other products are not included. Note: Light reflection 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.