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Contental Contact 32mm on 22mm internal width rim????

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Contental Contact 32mm on 22mm internal width rim????

Old 06-02-19, 03:41 PM
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Contental Contact 32mm on 22mm internal width rim????

I have a spare set of rims that I measured to have about a 21.5-22mm internal rim width they are about 25mm wide on the outside. I would like to put a set of 32mm Continental Contact on for some road use. So the tire would be about 7mm wider than the rim - so it should protect from pinch flats. I would probably run about 75-80 psi in the 32mm tires.

Any issues with 32mm tire on a 21.5-22mm internal rim width?
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Old 06-02-19, 04:37 PM
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Originally Posted by FordTrax
I have a spare set of rims that I measured to have about a 21.5-22mm internal rim width they are about 25mm wide on the outside. I would like to put a set of 32mm Continental Contact on for some road use. So the tire would be about 7mm wider than the rim - so it should protect from pinch flats. I would probably run about 75-80 psi in the 32mm tires.

Any issues with 32mm tire on a 21.5-22mm internal rim width?
None whatsoever. Just as a reference point, a Velocity Aileron rim has an internal width of 20mm and they publish optimal tire width of 25 to 47mm, but I would have no hesitation pushing those boundaries.
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Old 06-02-19, 04:42 PM
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I believe the stock rims on the 2012 Trek DS 8.3 was close to that width & came with 35 stock. I've went to a 28 & didn't have any issues. Shouldn't be an issue to size up in your case, but it comes down to the brand, type of tire, & purpose.
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Old 06-02-19, 04:43 PM
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According to a chart from Sheldon Brown (a noted and much-celebrated bike expert who cataloged enormous amounts of useful bike data online during his life), the "optimal" rim width would be 17mm or so for a 32mm tire. Your rim is shown as on the edge of acceptable, but Sheldon notes that the chart is conservative.

In practice I don't think you'll have a problem with 32mm tires on that rim. Probably wouldn't go much smaller, though.


https://sheldonbrown.com/tire-sizing.html
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Old 06-02-19, 08:01 PM
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Originally Posted by FordTrax
I have a spare set of rims that I measured to have about a 21.5-22mm internal rim width they are about 25mm wide on the outside. I would like to put a set of 32mm Continental Contact on for some road use. So the tire would be about 7mm wider than the rim - so it should protect from pinch flats. I would probably run about 75-80 psi in the 32mm tires.

Any issues with 32mm tire on a 21.5-22mm internal rim width?
Typical brake track thickness is 4-5mm, so external will be 8-10mm wider than internal.
Are these disc only rims?

As far as the tire fitting, I wouldn't have a problem with your selection.
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Old 06-04-19, 03:04 PM
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One of my wheelsets currently has 28mm and 32mm Conti GP 4 Seasons on HED Belgium Plus rims, which are around 21mm internal width. It works great. HED specs this rim for an incredible 23-58mm width range. That's right, they say it's fine to run a 23mm tire on a rim with a 25mm external width. Personally I've always found that particular Sheldon Brown chart sketchy and generally ignore it.
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Old 06-05-19, 01:42 PM
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Not an issue at all. BITD I used 17mm wide rims on my mtb with 2" (50mm) wide tires without any trouble for years... I didn't even realize there could be a problem until I read about recommended rim/tire widths on BF.
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Old 06-05-19, 01:44 PM
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Originally Posted by Wilfred Laurier
Not an issue at all. BITD I used 17mm wide rims on my mtb with 2" (50mm) wide tires without any trouble for years... I didn't even realize there could be a problem until I read about recommended rim/tire widths on BF.
Same.
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