The recommended minimum wrap angle of the smallest sprocket in the drive is 120°. The wrap angle can be reduced to 90° if good chain tension adjustment is maintained. If chain tension is not closely maintained with less than a 120° wrap, the chain can jump teeth, resulting in damage to the chain and/or the sprocket.

Note: For a sprocket ratio of 3:1 or less there will always be 120° more wrap on the small sprocket, regardless of the center distance.