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best way to measure a frame size(2 posts)

best way to measure a frame sizeCORONADO FLYER
Mar 6, 2003 9:33 PM
lets here it. what measurment sizing is beter. 1. bb center to center of top tube. 2. bb center to top of top tube. 3. bb center to top of seat tube.

there are so many manufacturers using all three types of measurnments. i wish all manufactueres would just choose one. so why do they use three different ones with their frame sizes?
There's no "best" as long as you're consistent.Silverback
Mar 7, 2003 8:57 AM
The road standard used to be center-to-center. I think mountain bike manufacturers started the center-to-top-of-top tube trend--can't remember why, but I read it years ago. That seems to be taking over now.
I've only seen center-to-top of seat tube on a few bikes, and only recently, but it seems to me an unnecessary complication. As a tall guy who has trouble finding frames big enough, I think it's deceptive--it makes it easier to order, say, a "64cm" bike that's really only about a 61.5.