Ball Bearing Idler Sprocket, Bore Diameter 5/8 in, Chain Number 60, Sprocket Material Steel, Number of Teeth 13, Outside Diameter 3.49 in, Bearing Material Steel, Bearing Type Ball, For Chain Pitch 3/4 in, For Number of Strands Single, Hub Diameter Not Applicable, Hub Projection Not Applicable, Length through Bore 23/32 in, Lubrication Not Required, Maximum Radial Load at Speed 230 lb @ 1200 rpm, 262 lb @ 900 rpm, 298 lb @ 600 rpm, 360 lb @ 300 rpm, 530 lb @ 100 rpm, Pitch Diameter 3.134 in