Greenspeed 15t Idler w/Sidewalls and 10mm Bearing

Combines a 15 tooth sprocket with sidewalls to keep the chain in place on rough roads. Holes must face inward to prevent the idler from coming off the bearing. Non-machined teeth and a 10mm inner diameter on the bearing.  It has a 72mm overall diameter.  Works on 2007 and earlier Greenspeed trikes.