In the past I've only ridden a 48x39. I'm buying new chainrings with a 110 bcd this time. I was going to go 48 in the big again. Should I do 38 or 36 in the little?

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There is nothing lighter than a hole

what use/what size cassette ?

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tcr's rule !

stefanpearce@rocketmail.com

racing, 12-25

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There is nothing lighter than a hole

Also depends a lot on where you race and the terrain. I race in the Intermountain West and there are a lot of hills on the cross courses, so I use 44/36 chain with a 13-26 cassette. If I lived somewhere flat with fast courses I would run 46/38 with 12-25 cassette, or even a 48/38 if the courses were really fast.

There's as many opinions of 'what's good for me' as there are people giving the advice.

Me? 34/44 'cause I like to spin. I have a 46t big ring on now and its a hair big. This is especially noticeable trying to maintain speed on the east coast grass race courses.

Chainrings are fairly inexpensive. Try a few different ones and see.

If you're JRA on gravel roads, 36/50 or 34/50 are a good bet. Once cross season's over, I'll go back to the 34/50 setup and ride my Full Tilt Boogie like a road bike.

HTH

M