Simple, light-power spring provides a gentle centring effect to keep the front wheel of the bicycle straight when a centre stand causes the front wheel to lift.
Especially useful for Cargo type bikes when weight is added to the rear whilst on a centre stand. 
Universal type flexible plastic band clamp fits most frame downtubes up to circa 63mm diameter.
Specification
Spring type: Steel coil with plastic guard.
Downtube clamp: Plastic with worm-screw 31.8-63mm tube