Can be used for all chain drive applications including center mount and rear mount chain drive for gas motorized bicycle plan kits. Must be mounted so that it pulls on the chain so the spring action will work effectively keeping the chain tight, but not too tight.
![WATSABRO Seat Post Spring-Loaded with 2 Spacer Sleeves, Bicycle Seat Post [Diameter 27.2 / 30.9 / 31.6]](https://images.buynet.work/thumb.php?i=376325315&s=240)