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Rim Width vs Tire Width(6 posts)

Rim Width vs Tire WidthJames_M
Aug 25, 2002 9:47 PM
This is kind of on the same lines as the post below but is there a general rule of thumb when figuring maximum tire width for a given rim width? I am trying to pick out a new rim to build up for my play bike which will work with my 700x35 Ritchey Speedmax tires. Some of the rims that I have been looking at (Mavic,WTB,Velocity)seem to have a max tire size of 30mm or less. Are my only options to either use a touring style rim (I know Mavic has a few and Velocity makes the Dyad) or change to a narrower tire?

Since I am on the subject of rims is anyone using the Salsa Delgado cross? From what I could find it is the same width as the Sun CR18 which is rated to take up to a 35mm tire. Any information would be greatly appreciated.
I'm going to go out on a limb here...Velocipedio
Aug 26, 2002 5:41 AM
But if I remember correctly Mavic's [in particular] tire size guidelines are predicated on the use of high-pressure tires. That is, a 35 at 110 psi would be a not-too-good idea on an Open Pro rim, but the same tire on the same rim at 65 psi, or 50 psi should be okay. The variables to consider when seating a clincher tire on a clincher rim are rim width, tire width and tire pressure.
I'm going to go out on a limb here...atpjunkie
Aug 26, 2002 4:53 PM
have run 35 tires @ 75 psi on Open Pro's and I'm 200 plus. no problems (yet), usually run at about 55 psi.
Fear notOffRoadTourer
Aug 27, 2002 5:36 AM
I'm running 38c knobby tyres on very narrow Campagnolo rims and have treated them hard and never had a problem. I run about 75-80 psi. If you're really worried try building up the inside of the rim with an extra layer or two of rim tape, it lessens the chance of you're tyre unseating itself, but really I can't see you having a problem.
Fear notatpjunkie
Aug 27, 2002 10:36 AM
good news. I'll keep ya informed when I try the 38's
Thanks for all the great info.!! (nm)James_M
Aug 27, 2002 9:49 PM