Chrina 700c Coaster Brake Wheel is manufactured in aluminium with a low profile. It is a very light wheel and is mounted with 36 spokes.The Chrina rear wheel includes an internal hub with coaster brake. It does not have a brake rim, so it is only possible to activate the built-in coaster brake. In order to brake, you will need to stop pedalling and pull back on the pedals. It is compatible with OLD (Over-Locknut-Dimension) hub lengths of 118 mm and includes a 18T sprocket.You will need a inner tube with a 30 mm valve. And it is essential to place an rim tape between the tyre and the inner tube.