[Durable Material]:Made of Metal material. Our Bike Single speed conversion kit is lightweight but durable, anti-corrosion and anti-rust. Compatible with the chain width from 1/2 inch x3/32 inch to 1/2 inch x11/128 inch . (6 speed to 11 speed chains).
[Compatable with]:Single speed conversion kit sizes: 15T. Suitable for racing bikes, road bikes, mountain bikes. Compatible with for Shimano and Sram Hubs.
[Chain Size]:Convert a multi speed hub to single speed wheel. Compatible with all shimano or sram 7 to 10 speed cassette type hub body. (Compatible with for 1/2 inch x 1/8 inch and 1/2 inch x 3/32 inch single speed chains)
NOTE: It will NOT covert the hub into fixie, so the hub is still a freewheel hub.
With it, you can ride your bike more happily, make you love the sport more, and be more suitable for road, cross-country, mountain biking

Material:Metal
colour:Black + Silver

Package Contents:
1 * flywheel
1 set * flywheel cover
4 * spacers

Only the above package content, other products are not included.
Note: 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.