Thread: Same Gear Ratio - Bigger/Bigger or Smaller/ Smaller (chainring/cog)
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Old 04-16-20 | 02:46 PM
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ThermionicScott
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Bikes: 1991 Bianchi Eros, 1964 Armstrong, 1988 Diamondback Ascent, 1988 Bianchi Premio, 1987 Bianchi Sport SX, 1980s Raleigh mixte (hers), All-City Space Horse (hers)

Originally Posted by sc007
44/16 (ratio of 2.75)
47/17 (ratio of 2.76)
50/18 (ratio of 2.78)
52/19 (ratio of 2.74)

So all are almost the exact same ratio. If one wants to maintain the same gear ratio (skid patches don't matter as the bike would be freewheeling, not fixed), what are the pro's and con's of going Bigger/Bigger vs Smaller/Smaller for street riding?
Although it's probably rare, some frames don't have enough chainstay clearance to run big chainrings with a 42mm chainline. My FG-converted mountain bike limits me to a 45T ring, for example. Not the end of the world, though!
Last edited by ThermionicScott; 04-21-20 at 11:26 PM.
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