I've been riding 42/15 (170mm crank) for god knows how long. I think that is like 75 gear inches / 2.8 gear ratio. I don't skid all that much, so I'm not overly concerned with maxing out skid patches (that said, more is always better).
So, assuming I wanted to keep same gear inches / ratio, and was not just looking to increase skid patches, what substantive difference would I experience if I switched to 48/17, 51/18, etc? Stated another way, if someone was not just looking to increase skid patches, why would they choose gearing X over gearing Y when they both have the same gear inches / ratios?
Thanks in advance!