![]() ![]() If you're using a Schlumpf Drive plus an internal-gear rear hub you should enter the actual number of teeth of the front chainring for the first chainring, and this number of teeth times the Schlumpf ratio for the second chainring. For brands and models not covered, or if building up a custom cassette, you will need to count sprocket teeth and enter the tooth counts under "custom sprockets." Our cassette page links to additional information on cassette tooth counts. The selection of cassettes is up to date as of February 2018 for Shimano, SRAM, SunRace and recent Campagnolo models. The selection of internal-gear hubs in the Calculator is complete except for one a few new models whose gear ratios have not been made public, and some very rare antiques. If you do a calculation, then bring those to the front, subsequent "results" windows from subsequent calculations may be hidden behind them.įor multiple calculations, you should close each set of results in turn, not hide them. The small one will overlay the large one in a browser which supports tabs. Many internal-gear hubs listed and some of the cassettes are no longer in production.Ĭlicking on "calculate" generates two new output pages: a full-size one, and a small one which you might print out and tape to your bicycle's handlebar stem for reference. This page covers most internal hubs back to the original 1902 Sturmey-Archer. Listing of internal hubs is A>Z by manufacturer, then by number of speeds, type and age.įichtel & Sachs, Sachs and SRAM are the same series of hubs, shown together. One sprocket unless you choose a stock cassette. You need to enter data for at least one chainring, and at least ![]()
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