Originally Posted by
balindamood
... I am considering doing a 650B conversion, so I was interested in re-calculating the trail based upon the new wheel size. It is a 58 cm frame (c-c I think).
Use a 73 head angle and 45mm rake for your calculations. Of course the results will all depend on the actual tire diameters but I'm guessing that you're looking at less than 5mm difference