22273 - OREGON POWERMATE RIM LARGE 7-SPLINE 3/8" PITCH - 8 TOOTH

388 - OREGON REPLACEMENT RIMS 3/8" PITCH - 8 TOOTH Oregon Replacement Rim Sprockets For ChainSaws.  3/8" PITCH  -  8 TOOTHStandard Splined Rims have a sprocket bore of approximately  7/8".Please have saw model and sprocket type available when ordering.Choose From: Part # Description 387 3/8" pitch - 7 Tooth 388 3/8" pitch - 8 Tooth 3257 .325 pitch - 7 Tooth 3258 .325 pitch - 8 Tooth 4047 .404 pitch - 7 Tooth 4048 .404 pitch - 8 ToothComstock Logging Supplies stresses the importance of regular maintenance. This does not stop at the sprocket; a  misused sprocket will cause patterns of chain wear which can damage the guide bar and reduce the life of chain, bar, and sprocket. Proper maintenance includes:• Proper chain tension; loose chain tension is a leading cause of sprocket problems.• Clean all build-up from splined hub so the rim can float freely.• Never run an old chain on a sprocket.• Apply grease to the clutch drum’s bearings each time the sprocket is removed.