Hello All,

I was talking to someone about road discs and what parts are out there for such a setup when the guy I was talking to pointed out that while a 29er rim is certainly the right diameter to fit a road tire, it would be far too wide. However, he admitted that he's never tried it (or talked to anybody who's tried) and personally I haven't either. So my question to you is this: What do you think is the widest rim that could fit a 23mm road tire? What about a 25mm tire?

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I'm so rubbish at this.

25mm rim sounds way too wide for a 23mm tyre

this page has the etro chart...

http://www.schwalbetires.com/tech_info/ ... nsions#rim

Ahh, that link does not address tubulars. Perhaps the rules are different for those. I don't believe "The inner diameter of the tire must match the rim bead seat diameter" applies to tubulars.

Sorry I worded that poorly. I meant to ask what is the widest rim for a 23mm tire or a 25mm tire. I'll edit it to fix that.

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I'm so rubbish at this.

A 25mm wide rim could be totally fine for narrow tyres depending on what the real tyre size is and what the inner width of the rim is.

On one end of the scale a nice large volume casing and a rim with a large traditional bead hook, they're likely to not be much wider than something like a HED C2 or A23 (maybe even similar to some of the carbon 'aero' wheels). on the other end of the scale, a small tyre casing and a ZTR style bead hook - suddenly things don't work too well.