Author Topic: What is equivalent to 31 x 10.5 x 15 for trucks?  (Read 20522 times)

Offline Chunkster

  • Learner's Permit
  • *
  • Location: Vancouver, BC
  • Posts: 4
  • Carma: +0/-0
    • View Profile
What is equivalent to 31 x 10.5 x 15 for trucks?
« on: October 07, 2007, 04:59:33 pm »
Hi,

Trying to look for replacement truck tires for my Pathfinder and searched and searched and can't find a definite answer to this.  Can someone tell me the equivalent tire size to 31 x 10.5 x15" within the same rim size, ie 265/70/15?  Why the difference in naming conventions?
Thanks,
Rich

Offline safristi

  • Car Crazy
  • *****
  • Location: Bethlehem
  • Posts: 43642
  • Carma: +264/-269
  • Gender: Male
    • View Profile
  • Cars: since the beginning of Saf timeLOTUS ELAN,STANDARD... 10, MG midget, MGB (2),Mazda Millennia,Hyundai Veloster and 1997 Ford Ranger 2014 Subaru Forester XT
Re: What is equivalent to 31 x 10.5 x 15 for trucks?
« Reply #1 on: October 07, 2007, 07:20:35 pm »
 wait fer it.....................



 HERCULES 250/17/55HR................... :P
Time is to stop everything happening at once

Offline HeliDriver

  • Car Crazy
  • *****
  • Location: AB
  • Posts: 4297
  • Carma: +44/-49
    • View Profile
  • Cars: 2010 GTI; 2011 Yukon XL 2500
Re: What is equivalent to 31 x 10.5 x 15 for trucks?
« Reply #2 on: October 07, 2007, 10:18:48 pm »
265/75R15 would be the closest size for you, although still a little bit smaller than 31". We had 31x10.50R15s on our Xterra, and they were slightly (but noticeably) larger than the stock 265/75R15s.

If you want to stay with 15" rims, then that will pretty much be your only option. At least, according to this chart: http://www.tirerack.com/tires/tiretech/techpage.jsp?techid=53

As for the difference in naming conventions, one is an offshoot of P-metric sizing for passenger cars, the other is flotation sizing for light trucks. As for why they both still co-exist, that's an interesting question.  ???  Here's the best I could find, but maybe one of the resident experts has a better explanation. http://www.autotirecarcare.com/guide/sizing_truck.html

Offline tause62

  • Noob
  • *
  • Location: reno
  • Posts: 1
  • Carma: +0/-0
    • View Profile
Re: What is equivalent to 31 x 10.5 x 15 for trucks?
« Reply #3 on: December 03, 2008, 01:28:12 am »
i think the equivalent is 280/75/15

Offline Squishy

  • Drunk on Fuel
  • ****
  • Location: Orillia, Ontario
  • Posts: 1539
  • Carma: +0/-0
  • Gender: Male
  • The goggles, they do nothing!
    • View Profile
    • Ford Escape Forums
Re: What is equivalent to 31 x 10.5 x 15 for trucks?
« Reply #4 on: December 03, 2008, 02:43:43 am »
Holy thread revival!  :o

But to add to what SiRCivic stated, high floatation tires provide more floatation than P-metric tires.  Those are the tires you would use if you drive through a lot of sand, mud, or very deep snow, where you do not want the tire to sink.

(Also, "280/75R15" is not a P-metric size)
« Last Edit: December 03, 2008, 02:45:38 am by Squishy »



The Garage:
1999 Ford Escort SE, 2001 Acura MDX, 2003 Mitsubishi Lancer ES, 2003 Ford Escape XLS

Offline HeliDriver

  • Car Crazy
  • *****
  • Location: AB
  • Posts: 4297
  • Carma: +44/-49
    • View Profile
  • Cars: 2010 GTI; 2011 Yukon XL 2500
Re: What is equivalent to 31 x 10.5 x 15 for trucks?
« Reply #5 on: December 03, 2008, 02:45:16 am »
i think the equivalent is 280/75/15

Since it amounts to the same thing in the real world (where one can only buy tires in sizes that exist), I think the actual equivalent is 267/77R15.  ;)

Offline ktm525

  • Car Crazy
  • *****
  • Location: against the eastern side of the rocks
  • Posts: 5048
  • Carma: +6/-7
  • Just walk away!
    • View Profile
  • Cars: Volvo 1800E, Land Rover LR4, Honda Ridgeline
Re: What is equivalent to 31 x 10.5 x 15 for trucks?
« Reply #6 on: December 15, 2008, 12:27:19 pm »
i think the equivalent is 280/75/15

Since it amounts to the same thing in the real world (where one can only buy tires in sizes that exist), I think the actual equivalent is 267/77R15.  ;)


My old Dakota came with 31*10.5  on 15" wheels. The newer truck came with 265/70-16. These are a smidgen shorter but close. I would think that a 265/75-15 would be close if they exist.