Needle Bearing Idler Sprocket, Bore Diameter 1 in, Chain Number 80, Sprocket Material Steel, Number of Teeth 13, Outside Diameter 4.66 in, Bearing Material Steel, Bearing Type Needle Roller, For Chain Pitch 1 in, For Number of Strands Single, For Use With Tightener Shaft, Hub Diameter 2 5/8 in, Hub Projection 0.675 in, Length through Bore 1 1/4 in, Lubrication Grease, Maximum Radial Load at Speed 1083 lb @ 1000 rpm, 1327 lb @ 500 rpm, 2174 lb @ 100 rpm, 880 lb @ 2000 rpm, 961 lb @ 1500 rpm