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I use this a lot http://yojimg.net/bike/web_tools/trailcalc.php
It will also give you ca circumference
Hulsroy-
<It will also give you ca circumference
What is that good for exactly?
I'm looking at a Kaffenback 2 as the next light-tourer build, and I can see that bankiren is running 37's on 700c rims even though on the homepage it says 32mm max. Has the circumference something to do with him being able to have 37's in?
Thrust
Is there a formula to getting the correct numbers out, say if a 650b wheel with a X mm tyre is equivalant to a 700c wheel with a X mm tyre?
So as an example - a 650b with a 48mm tyre = 700c tyre with 28mm tyre. This is probably not correct but you get the gist of it.