Bike Forums - View Single Post - Can a frame-builder replace a 1 inch threadless steerer with a threaded steerer?

11-19-13 | 07:02 PM

#24

IthaDan

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Quote:

Originally Posted by Scooper

I'm not sure how a 22.2mm quill stem designed for a 25.4mm O.D. steerer with 1.5mm walls would work with a threadless steerer having significantly thinner wall thickness. Would the stem ever expand enough in the larger diameter I.D. steerer to be secure?

Code:

25.4 - (1.5 + 1.5) = 22.4.
OD - (wall + wall) = ID

22.4!

I'd imagine a quill stem could make up .2 of a mm handily. For those thinking in inches, this is less than .008. FWIW, the tolerance for copper plumbing fittings is .005", so it'd be a little loose of a fit, but completely possible to make work.

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