tire size / compatibility

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  #1  
Old 10-15-04, 07:30 AM
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tire size / compatibility

My sister is in need of 4 new tires and currently has P255/65 R16 tires on her Pathfinder. I have a brand new L225/75 R16 tire from my old Rodeo that never touched the road. If I give her this tire, and she bought 3 matching ones...would it be ok to use this new size on her ride?
 
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Old 10-15-04, 08:49 AM
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Old 10-15-04, 09:27 AM
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Interesting site. Here are my numbers:

Specification Sidewall Radius Diameter Circumference Revs/Mile Difference
255/65-16 6.5in 14.5in 29.1in 91.3in 694 0.0%
225/75-16 6.6in 14.6in 29.3in 92.0in 689 0.8%


Now, aside from a 0.5mph difference in speed, would the new tires fit the rims? Would it be a safe swap?
 
  #4  
Old 10-15-04, 11:07 AM
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I don't see why they wouldnt., but I'm no tire expert either.

I would try calling someone at tirerack.com
make sure this shortcut isn't going to cost you more money for 3 tires, than you would spend for 4 tires anyway.
 
  #5  
Old 10-15-04, 04:37 PM
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A lot will depend on the type and width of the rims on the car. You will definately have a much narrower tire. How old is that spare anyway. It's likely too aged anyway and probably couldn't be matched exactly. The total life expectancy of a tire is around 48 months. That's when most tire warranties expire. She could probably make a much better deal on a set of 4 of something else.
 
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