38mm tire on 25mm internal width rim?
07-31-21, 10:11 AM
#1
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38mm tire on 25mm internal width rim?
White Industries G25A says 40mm to 54mm on their site and 38mm to 50mm on the rim itself. I asked about the inconsistencies and was told they are both half right...38mm to 54mm will be fine.
So, I got a 38mm for the front and 40mm for the rear.
But everything I read seems to indicate that 38mm is way too small for a 25mm rim. Same with 40mm.
Thoughts?
So, I got a 38mm for the front and 40mm for the rear.
But everything I read seems to indicate that 38mm is way too small for a 25mm rim. Same with 40mm.
Thoughts?
07-31-21, 10:53 AM
#2
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Different compatibility charts give different information, but I wouldn't say 38mm or 40mm are "way too small."
07-31-21, 12:37 PM
#3
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All the places I looked were saying even smaller. For example I have Light Bicycle 25mm ID and here is their chart:
07-31-21, 01:09 PM
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There is so much debate and fudge room between recommended tire/rim widths these days that you'll go crazy trying to determine the "correct" size. OP's chosen rim width and tires are close enough not to notice much, if any, difference from using a slightly different width. Mount em' up and enjoy a nice bike ride.
08-02-21, 09:10 AM
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Sometimes the best way to find out is to try it. If it's a clincher, Buy on Amazon Prime, install it, ride indoors for a bit. If it doesn't work return. Good luck
08-02-21, 09:24 AM
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I’m not sure when the ultra conservative tire sizing started.
There was a time I was riding 700x20’s on 14mm internal (19mm external) width. There was a lot less rubber to support the rim than a 38mm tire on a 25mm rim.
I “vaguely” recall that the rule of thumb was to ride with a tire that at least as wide as the external width of the rim. I don’t ever remember riding indoors to test that 1mm external difference.
John
There was a time I was riding 700x20’s on 14mm internal (19mm external) width. There was a lot less rubber to support the rim than a 38mm tire on a 25mm rim.
I “vaguely” recall that the rule of thumb was to ride with a tire that at least as wide as the external width of the rim. I don’t ever remember riding indoors to test that 1mm external difference.
John
08-02-21, 03:34 PM
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Are the tires budget busters? Back in the day, I and most others I knew just put the tire on the rim and if it felt squirrely on twisty downhill turns or other times, then we'd raise or lower the pressure. If it still felt bad after trying more or less PSI, we'd get another size tire.
