I believe I have SunStar sprockets on mine now. Steel counter and aluminum rear. Vortex should also make sprockets.There should be a number of brands. Any bike shop should be able to get them for you.My bikes live at my pals bike shop, so I just look them up in one of his catalogs(Motorcycle stuff,Parts Unlimited,Tucker Rockie) I always put new sprockets on with a new chain. I chaged my gearing,but I went the other way and lowered it. But I know other Banditos went higher . I think a little grinding may be necciary if you go up one on the counter.