Please see the description of this listing : This is a brand new with high quality complete Axle Assembly Kit good for DIY go kart projects or rebuilds, which will make your bike firm and durable. Here is the measurement : Length : 740mm Chain Sprocket : T8F 58T Fits many 50cc 70cc 90cc ATV quads, such as Atomik, Motorwork, DHZ , LEI etc. Note : Please check the picture carefully before you buy ! Package Included :Complete Rear Axle Kit + Pillow blocks bearings+1x Brake assembly master cyclinder