Join Date: Jan 2008
Location: Beaverton, OR
Bikes: 2013 Kona Jake, 2015 Kona Jake the Snake, 2008 Kona Major Jake, 2013 Kona Jake the Snake, 2006 Kona Kula, 2012 Ridley Excalibur, 2001 LeMond Buenos Aires, 1984 Pinarello Gran Turismo, 1982 Trek 614, 1979 Austro-Daimler, 1974 Steyr Clubman
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I don't think I agree with Knobster. There were a couple of races around here last year (Sherwood & Astoria) where being able to ride a hill that some other people were dismounting for got me a couple of extra places in the standings. I suspect that's mostly a beginner thing, because nobody in the upper cats were dismounting for those hills. For me, having a 30-25 gear at my disposal made all the difference.
Obviously, the course will dictate whether or not this matters for you. This year, I plan to use 50-39-30 front/12-27 rear gearing for a few races but 46-36 front/13-25 rear for most others.
FWIW, a 27-tooth cog with a 39-tooth chainring has slightly higher gearing than a 25-tooth cog with a 36-tooth chainring, while a 30-tooth cog with you 39T ring, would have slightly lower gearing than a 36T ring with a 27 -tooth cog.
Last edited by Andy_K; 07-31-10 at 08:57 PM.