A Tires 101 lesson on ...  Changing Tire Sizes

 When replacing tires, be sure to purchase the original size or an acceptable substitute size.  Click on your rim size to view a table listing substitute tire sizes.

 
Substitute sizes for 13 inch tires Substitute sizes for 14 inch tires Substitute sizes for 15 inch tires Substitute sizes for 16 inch tires

General Rules for Replacing Tires

Replacement tires must have:

  • load carrying ability equal to or greater than required by vehicle placard
  • inflation pressure capability equal to or greater then the pressure specified by manufacturer

Tire Mixing

  • it is preferred that all 4 tires be the same size, speed rating, and construction (radial or bias)
  • match tire size designations in pairs on an axle, except for temporary use of a spare tire
  • if 2 radial and 2 non-radial tires are used, put the radials on the rear axle
  • snow tires should be applied in pairs to the drive axle (front or rear) or to all 4 positions
  • when studded snow tires are mounted on the front, they also must be mounted on the rear
  • match tire sizes and constructions on 4-wheel drive vehicles

Rim and Wheel Selection

  • mount tires only on approved rim widths
  • always check to be certain that the diameter designation for both tire and rim are the same.  For example:  a P225/75R15 tire must be mounted on a 15" rim

 
All prices are F.O.B. , Firth, NE (unless otherwise stated).   Free Shipping (where stated) applies to the continental 48 states only.  All other locations should call for a shipping quote!  Most ATV, passenger and light truck tires can be shipped for $10-$15 each (unless otherwise stated).  Call us for an estimate on pallet rates of tires. Click to verify BBB accreditation and to see a BBB report.

Each order is subject to a miscellaneous materials and fuel surcharge as follows:
$5.01 to $20 - $1;  $20.01 to $100 - $3;  $100.01 to $300 - $4; $300.01 to $400 - $5; $400.01 to $600 - $6;
$600.01 to $1,000 - $8; $1,000.01 and up - $10 max

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