Question about 2001 GMC Jimmy
The recommended tire for this is a 235/70/r15. I want to change to a 235/75/r15 but my Dad says it's not a good idea. The 70's are only available in a 4 ply and I live in the country. We are forever plugging and replacing tires and they usually start around $130 each. So I want something with a little more grit to withstand my country roads. Will changing tire sizes change how my vehicle runs?
Posted by Anonymous on
If you change tire size you will have a minor speedometer errors. And you have to make sure that if the tire is wider, that you have no issues when you turn the front wheels.
Other than that you are good to go.
Posted on Aug 03, 2017
I don't believe there would be a problem due to fit but this is difference in measurements.
The 75 diameter (across tire) is 28.88 in.
The 70 diameter is 27.95 in
The 75 width of tire is 9.25
The 70 width is also 9.25
The 75 circumference 90.72
The 70 circumference 87.82
The 75 sidewall height 6.94
The 70 sidewall height 6.48
The 75 revolution per mile 698
The 70 revolution per mile 721
The 75 speed at 50 and the 70 is 48.4
I can't see why it would not work.
Posted on Aug 03, 2017
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Posted on Jan 02, 2017
SOURCE: steering noise
The noise you are hearing is most likely from the tires. If you like the the tires try wheel spacers or if its a 4x4 try cranking the torsion bars, but make sure you do them equally
Posted on Oct 24, 2008
for exact tire size open the drivers door, there is a sticker there unless someone irresponsible has painted it, and have a nice day!
Posted on Aug 16, 2009
Yes its ok, the 75 tires are a little taller. your speedometer will not read correct speed, you will actually be going faster than what it reads.
Posted on Sep 18, 2009
Testimonial: "Thanks for the info on the speed,i wasn't aware of that."
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