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CX vs. road bike sizing(4 posts)

CX vs. road bike sizingspeedisgood
Jun 20, 2002 6:03 PM
What size CX frame should I get if I ride a 52 cm c-c seat tube, 54 cm c-c top tube GT road bike with a 120 mm stem?
re: CX vs. road bike sizingVelocipedio
Jun 21, 2002 5:03 AM
The rule of thumb is next size down. On a traditional frame, you want standover clearance to make up for the higher BB, and a slightly shorter TT for a more upright position in the drops. So you'd be looking at a 51 or 50 cm frame. On the other hand, you might find that a 52 cm frame with a slightly sloping TT [like the Kona] fits just fine.

Try 'em before you buy 'em.
re: CX vs. road bike sizingatpjunkie
Jun 25, 2002 3:52 PM
I'd say go with a 50 or 51. You don't want to slam your junk on a dismount. I tend to like a longer TT and shorter stem on my cx bike but it does tend to make them twitchy. I run 57 or 58 cx bikes with 58 cm TT's and 90 -100 stems
On the other hand...Velocipedio
Jun 25, 2002 5:01 PM
The math makes me fit for a 51 cm frame, but I ride a 52 cm Kona. The reason is that I find smaller frames too short in the TT for me, and a long stem makes the steering really sluggish. The Kona has a slightly sloping TT, though, so I get adequate SO and have yet to slam my junk on a dismount... can't say the same thing for running mounts, however... :(