Will 315s fit on 11 inch wide rims? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

El Campo · 08-28-2013, 09:55 PM

Have been toying with the idea of putting some 315/35/20s on my Intros but do not know if this is a good idea. The wheels are a true 11 inches wide but by my figures the 315 equals about 12.6 inches wide. Is this too much to put on rim? Also the 315 refers to the tread width correct? Will an aspect ratio of 35 percent make the sidewall bulge significantly more than that or will it be about that wide or narrower (at the widest point of tire). Help me out guys!! I have 5 inch backspacing also and by my figures it SHOULD still fit under bed but I am already planning on cutting out inside of bedside and building in more clearance.

Lee H · 08-28-2013, 10:15 PM

Yes, 315 refers to width, 315mm, and the second number is aspect ratio, or 35% of the tread width. You can go to tirerack.com, plug in your tire size and see what rim width is recommended. I have a set of 295-70-15s on 10 inch rims and they barely fit inside the wheel well, maybe 1/4" on each side.
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knomadd · 08-28-2013, 10:16 PM

I'm assuming your "true 11 inch wide" wheel is from bead to bead, is this correct? A measurement of 11 inches from outside edge to outside edge is actually a 10" wide wheel. The measurement is taken between the beads, where the tire actually sits.

You're correct that the 315 refers to tread width. It's in millimeters. The aspect ratio of 35 refers to the sidewall height as a percentage of the width. So 315 x 0.35 = 110mm

Check this out for tire sizes. It's got all the info you'll need. http://www.rimsntires.com/specs.jsp

08-28-2013, 09:55 PM	#1
El Campo Registered User Join Date: Jul 2011 Location: El Campo, Tx Posts: 1,246	Will 315s fit on 11 inch wide rims? Have been toying with the idea of putting some 315/35/20s on my Intros but do not know if this is a good idea. The wheels are a true 11 inches wide but by my figures the 315 equals about 12.6 inches wide. Is this too much to put on rim? Also the 315 refers to the tread width correct? Will an aspect ratio of 35 percent make the sidewall bulge significantly more than that or will it be about that wide or narrower (at the widest point of tire). Help me out guys!! I have 5 inch backspacing also and by my figures it SHOULD still fit under bed but I am already planning on cutting out inside of bedside and building in more clearance. __________________ 72 Chevy blue LWB, 99% original Oklahoma truck, 28,000 miles 72 Chevy SWB: http://67-72chevytrucks.com/vboard/s...d.php?t=486626 (Attempt/Mistake #2) 2003 Harley Davidson Dyna Superglide with 2007 Street Bob front end 2000 Ford F350 Powerstroke 4WD CCLB, 310,000 miles running great (STOLEN St. Patricks Day 2014 AND NEVER RECOVERED) 2002 Ford F250 Powerstroke 4WD CCLB (To replace stolen one) Hook em Horns!!!

08-28-2013, 10:15 PM	#2
Lee H Registered User Join Date: Jun 2010 Location: Upland Ca Posts: 4,147	Re: Will 315s fit on 11 inch wide rims? Yes, 315 refers to width, 315mm, and the second number is aspect ratio, or 35% of the tread width. You can go to tirerack.com, plug in your tire size and see what rim width is recommended. I have a set of 295-70-15s on 10 inch rims and they barely fit inside the wheel well, maybe 1/4" on each side. Posted via Mobile Device __________________ 1972 C10 SWB, Air, PS, PB, 350/350THM. Second owner. 1965 Corvette roadster, 44K miles, 327/365 SHP, 4 speed, side exhaust, knockoffs, teak, second owner (bought in 1970), Have ALL numbers matching components. My frame off restoration thread: http://67-72chevytrucks.com/vboard/s...d.php?t=556703

08-28-2013, 10:16 PM	#3
knomadd Registered User Join Date: Jul 2012 Location: Rosenberg, Texas Posts: 3,506	Re: Will 315s fit on 11 inch wide rims? I'm assuming your "true 11 inch wide" wheel is from bead to bead, is this correct? A measurement of 11 inches from outside edge to outside edge is actually a 10" wide wheel. The measurement is taken between the beads, where the tire actually sits. You're correct that the 315 refers to tread width. It's in millimeters. The aspect ratio of 35 refers to the sidewall height as a percentage of the width. So 315 x 0.35 = 110mm Check this out for tire sizes. It's got all the info you'll need. http://www.rimsntires.com/specs.jsp __________________ -Duane C/10 Club Texas member 1971 Chevy C10 "Brutus" SWB Fleetside 2016 6.0L (L96) 6L90E (driver/project) 1965 Pontiac GTO "Royal Goat" 400/TH400 w/AC (my baby)



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