Originally Posted by
Richard Cranium
Designing a gear ratio set around gear ratio spacing has never made any sense.
I don't think I understand your point.
Say I have an intended use in mind and I've decided I want a gear range from around 20 to 25 gear inches on the low end and 100 gear inches on the high end. I have a number of ways to accomplish that. Especially if I have an older bike, and I'm considering whether to upgrade the drivetrain, or I have a preference for doubles vs. triples, or prefer downtube shifters vs. brifters.
Why wouldn't I want to understand the math involved in the gear ratios I'm using - and whether I have lots of double shifts, or whether I have lots of overlapping gears, etc.?