Compact gearing with 32t cog -- What rear derailleur? Short, mid, or long cage?
05-14-10, 08:49 PM
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Compact gearing with 32t cog -- What rear derailleur? Short, mid, or long cage?
I wouldn't think there are any short cage RD that could handle it, but would a mid cage, like a short mountain RD work?
05-14-10, 11:50 PM
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there are two factors in play when choosing a derailer, one is chain wrap and the other is largest cog. Road derailers typically can only take a 28 tooth largest cog, and even that can take a bit of finesse to make it work. Mountain derailers can accommodate up to a 36.
Chain wrap is given by the difference between the large and small chain rings, added to the difference between the large and small cogs. I don't know the numbers off the top of my head but I'd wager you're in long cage territory.
Chain wrap is given by the difference between the large and small chain rings, added to the difference between the large and small cogs. I don't know the numbers off the top of my head but I'd wager you're in long cage territory.
05-17-10, 08:24 AM
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If it's Shimano, then you have no worries about using a MTB rear derailleur with a road shifter. If it is SRAM, then there are some compatibility issues between road shifters and MTB RDs which have been discussed here before.
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