gear ratio chart from saskatchewanian
Geolojas:
A question…
What is the average speed you can expect to achieve on a 24" wheel with 127mm cranks? I expect the answer is a range depending on the experience of the rider, but I’m curious as to what is possible. I rode almost exactly 3 miles last night, and averaged just over 5 mph, which was about my best average speed to date. Anyone else have any other data?
About the best data comes from saskatchewanian in this Thread New concept: Total Gear Ratio - #23 by saskatchewanian
I did up a spreadsheet and colored in the similar values for easier visualization of similar gain ratios. The comments at the bottom are just what I think the various ratios would be suited for. The chart also demonstrates the jump in wheel sizes between 29 and 36. I wonder if that gap will ever get filled?
I used nominal values for the wheel sizes and a gearing ratio of 1.5 for the geared numbers but it should be good enough to give people a good idea of what kind of gain ratio they have in various setups.
The other factor would be cadence, on which this is an upper limit based on the rider. I don’t have much data here and haven’t every really tracked myself, but Rookie riders generally can’t do more than 120rpms…