• To use this calculator, you'll need to measure the height of your (loaded) rear tire, and know how many teeth are on the chain rings in question.
• Leave the Rohloff/Schlumph ratio settings at "1" if you don't have one.
• Use ".4" for the Schlumph type1 "2.5:1" ratio and "1.65" for the type2 "1:1.65" ratio.
• Use 1.462 for the Rohlhoff 14 speed hub
• Leave the Intermediary gear settings at "1" if you don't have an intermediary gear or jackshaft.
• At 110 gear inches, you'll spin out at about 40MPH.

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