Question about 2001 GMC Jimmy

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Recommended tire size is 2352/70/R15 can I change sizes?

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?

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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

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  • Master
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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

Anonymous

  • 15 Answers

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

lordFord

  • 175 Answers

SOURCE: what is the recommended tire size for this jimmy. 2 dr short

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

Ted Schore

  • 7353 Answers

SOURCE: is it ok to go from 235 70 r15 tires to 235 75 r15

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."

emissionwiz

Marvin

  • 85222 Answers

SOURCE: tire size gmc sonoma

They will fit but the speedometer will be off by about 5 MPH

Posted on Apr 17, 2012

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