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Dumb question, but how are stems measured?(6 posts)

Dumb question, but how are stems measured?fujipro
Jan 4, 2003 6:36 PM
Just recently bought a new road bike and I feel a little stretched. I'm thinking about making the stem shorter but I want to measure the current one to compare. Any info would be greatly appreciated.
not that dumb ...phatlizard
Jan 4, 2003 6:48 PM
Usually it is center to center - but here in Europe sometimes the french do it different from the Germans, the Italians ignore everything anyway and so on ...
But by now it should be the same worldwide - center to center.
If I am wrong about how the USA does it please let me know!

C to C "but"Kerry
Jan 4, 2003 6:57 PM
Some of the stems are "measured" as a projected length. This is the equivalent of how far forward the bars are from the center of the steerer tube. For stems with a large upward angle, this can be significantly different than a center to center distance.
Thanks for the info! nmfujipro
Jan 4, 2003 9:11 PM
re: Dumb question, but how are stems measured?Rusty Coggs
Jan 5, 2003 6:18 AM
C-C means different things. Current threadless is most likely C-C along the side of the extension from the center of the steerer clamp to the ceneter of the bar clamp. Quill types were different acording to type and sometimes brand.Maybe has some diagrams.
take the opportunityFrith
Jan 5, 2003 8:49 AM
To decide whether or not your bar height is good too. You can change the stem angle at the same time.
This has probably occured to you but I thought I'd throw it out there in case it hasn't. Might be a good opportunity to lose some spacers.