What range tires fit a rim?
03-10-20, 11:01 AM
#1
Senior Member
Thread Starter
What range tires fit a rim?
Hi y'all
How does one determine what range of tires width fit a given rim? More specifically, I'm trying to determine if DT SWISS G 1800 SPLINE 25 rims will accept 28mm tires.
Thanks
Dell Wilson
Madison, AL
How does one determine what range of tires width fit a given rim? More specifically, I'm trying to determine if DT SWISS G 1800 SPLINE 25 rims will accept 28mm tires.
Thanks
Dell Wilson
Madison, AL
03-10-20, 11:34 AM
#2
Senior Member
Here is a chart showing suggested tore sizes for given rim widths: https://www.sheldonbrown.com/tire-sizing.html#width Note that these are guidelines which are routinely exceeded without apparent problems.
Having said that, he specs on your rim show 24mm rim width which is pretty narrow for 28mm tires.
Having said that, he specs on your rim show 24mm rim width which is pretty narrow for 28mm tires.
03-10-20, 11:43 AM
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Not sure what dsbrantjr means by 24mm rims being 'pretty narrow' for 28mm tires - that's 4mm narrower than the tire width, 2mm per side. Perhaps he means 28mm is on the narrow side for 24mm wide rims?
In general, I try to have tires at least as wide at the outer width of the rim. Above that, it doesn't matter much. In the '80s and '90s we regularly used 17mm wide rims with 2.2" (~55mm) wide tires without problems. There are a few drawbacks, including increased lateral deflection and increased likelihood of pinch flats if the pressure is too low, but these were the rims and tires available and it worked fine.
In general, I try to have tires at least as wide at the outer width of the rim. Above that, it doesn't matter much. In the '80s and '90s we regularly used 17mm wide rims with 2.2" (~55mm) wide tires without problems. There are a few drawbacks, including increased lateral deflection and increased likelihood of pinch flats if the pressure is too low, but these were the rims and tires available and it worked fine.
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03-10-20, 12:03 PM
#4
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A rough guideline is rim width x 1.5 for tire width. Have you measured the inside width of your rim? Got room to run 35/40 mm tires on your frame? That tire on that rim will be really low profile, subject to rim strikes and will probably need to run really high psi.
03-10-20, 12:14 PM
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Go to the tire manufacturers site and many do.... somewhere.... have what size rims they recommend for a specific model of tire they make. Or just call or email them, many will answer.
Anything else is just a kludge that may of may not apply to the tire and rim you are considering. Sure it will give some guidance, but it's not definitive.
Anything else is just a kludge that may of may not apply to the tire and rim you are considering. Sure it will give some guidance, but it's not definitive.
03-10-20, 12:18 PM
#6
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Originally Posted by dsbrantjr
Here is a chart showing suggested tore sizes for given rim widths: https://www.sheldonbrown.com/tire-sizing.html#width Note that these are guidelines which are routinely exceeded without apparent problems.
Having said that, he specs on your rim show 24mm rim width which is pretty narrow for 28mm tires.
Having said that, he specs on your rim show 24mm rim width which is pretty narrow for 28mm tires.
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03-10-20, 12:21 PM
#7
Senior Member
Originally Posted by dsbrantjr
1
Having said that, he specs on your rim show 24mm rim width which is pretty narrow for 28mm tires.
Having said that, he specs on your rim show 24mm rim width which is pretty narrow for 28mm tires.
And not for nothing but 26" mt. bikes ran 50mm tires on 20mm wide rims for decades, at low pressures like 30 psi. They never rolled or came off.
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03-10-20, 12:37 PM
#8
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28mm is relatively narrow when you consider all cycling types. I haven't come across a rim I wouldn't put 28mm tires on without even blinking. And like Steve said, mountain bike tires are VERY often quite a bit fatter when compared to the rim than any road bike tire. Heck, I have a set of cheapo 700c road bike rims running 29x2.1 tires on a frankenbike with no problem (not that I'd recommend it).
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03-11-20, 01:10 AM
#9
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Originally Posted by Wilfred Laurier
In the '80s and '90s we regularly used 17mm wide rims with 2.2" (~55mm) wide tires without problems. There are a few drawbacks, including increased lateral deflection and increased likelihood of pinch flats if the pressure is too low, but these were the rims and tires available and it worked fine.
In terms of what's too narrow, I think people used to run 19-22mm clinchers on 13-14mm (inner width) rims.
