It's not doing Integer division is it? I.e. WD*(53/13) should give you WD*4.0769... not WD*4.Crackle said:Gear inches = wheel diameter*(front chainwheel teeth/rear chainwheel teeth)
Now my gear inch calculation is slightly out sometimes, so if someone knows why I'd appreciate a heads up, though it's generally close enough for my purposes.
Elaborate on the first please becasue I'm not sure I catch your drift but you might be on to something. I think the wheel diameter is right, trying to find an accurate table was the hardest part.ColinJ said:It's not doing Integer division is it? I.e. WD*(53/13) should give you WD*4.0769... not WD*4.
Another possibility is that you are not caclulating the wheel diamater properly for the size of tyre you are using?
How do you know that the calculation is out sometimes?
Apologies for misspelling diameter earlier!Crackle said:Elaborate on the first please becasue I'm not sure I catch your drift but you might be on to something.
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