Wide Compatibility: Coleman Powersports CT200U CT200U-EX BT200X KT196, Baja Motorsports mini bike MB165 & MB200 (Heat, Mini Baja, Warrior), Hensim mini bike MB165 & MB200 (Heat, Mini Baja, Warrior), MASSIMO MB200, TrailMaster MB200, Axis M200 Size:The sprocket kit is compatible with chain size 420,the diameter of the center hole is 1.575" (40mm),The diameter of the mounting hole is 0.31" (8mm). Feature: Precise tooth design makes the mini bike rear sprocket fit the chain perfectly and avoids the chain falling off, make your riding more safe.This mini bike sprocket is rafted from 7075 aluminum alloy, light weight but durable Better Riding Experience: The larger 60 tooth sprocket can provide more torque, better climbing ability, more power transfer and better transmission efficiency and cope with a variety of uneven terrain In the same condition of front mini bike sprocket unchanged. Note: The diameter of the center hole and the distance between the mounting holes determine whether the 420 chain sprocket is fit for your bike Wide Compatibility: Coleman Powersports CT200U CT200U-EX BT200X KT196, Baja Motorsports mini bike MB165 & MB200 (Heat, Mini Baja, Warrior), Hensim mini bike MB165 & MB200 (Heat, Mini Baja, Warrior), MASSIMO MB200, TrailMaster MB200, Axis M200