Posted by ADB-Ia on May 15, 2023 at 08:02:44 from (167.142.114.10):
In Reply to: 18.4 x38 vs 18.4x42 posted by DeltaRed on May 15, 2023 at 07:38:57:
From a simple geometry perspective a 42 will put put more tire on the ground than a 38. And because of tire characteristics, the radial tire puts more tread on the ground than a bias ply tire. So you gain twice. Each gear will have a percentage speed gain that may have to be compensated for. Calculating - if tire profile is 12 inches for both tires it gives tire diameter of 62 inches for the 38's and 66 inches for the 42's. A smidge over 6% difference.
This post was edited by ADB-Ia on 05/15/2023 at 10:27 am.
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