Offset Drive sprocket 10/11/12 tooth

Product Description RDM CNC-machined 4140 heat-treated drive sprocket with negative offset brings chain close to bearing, engine case, and tire for improved chain line. Suitable for optimizing chain when running a Stage 3 or 4 clutch system.Fits 66/80cc motorized bicycle engines, with 10t, 11t, and 12t options, and a lifetime warranty. 1/8” width for thinner 410 or 1/2”x1/8” chain, and 3/16 width for 415 or 1/2”x3/16” chain. 11t and 12t sprockets may need the wall between the chain and ignition cut away to fit.