Can I put slightly larger diameter tire?

Igor1976Igor1976 Member Posts: 1
edited March 20 in Dodge
Hello,
My car originally needs 225/70R16. A friend could give me a set of alloy rims with 225/75R16. This is 3.12% diameter increase. I read 'stay within 3%'. Can I take these 225/75R16 or should I avoid them? Main concern - can this much of an increase do any harm to transmission?? I know about the speed / odometer reading, that's not an issue really. The real issue is transmission. Maybe there are other serious concerns in this given case? Please suggest if you are knowledgeable. Thank you.

Comments

  • qbrozenqbrozen Member Posts: 33,289
    No, it won't be a problem at all. I've upsized far more than that on many vehicles.

    What you do need to be sure of, however, is that the new wheels are the proper bolt pattern, offset, and center bore. The wrong bolt pattern would prevent you from mounting them at all. The wrong offset could cause rubbing, either on suspension or fenders. The center bore, if too large, can prove to be dangerous. Almost all of these issues are possibly solved with adapters, depending on the specs.

    '11 GMC Sierra 1500; '98 Alfa 156 2.0TS; '08 Maser QP; '67 Coronet R/T; '13 Fiat 500c; '20 S90 T6; '22 MB Sprinter 2500 4x4 diesel; '97 Suzuki R Wagon; '96 Opel Astra; '11 Mini Cooper S

  • explorerx4explorerx4 Member Posts: 19,942
    If your tires are on Tirerack, you can check the rpm's per mile.
    Tires of the same 'size' may be physically different in size, so there may or may not be a 3% difference in circumference.
    2023 Ford Explorer ST, 91 Mustang GT vert
  • oldfarmer50oldfarmer50 Member Posts: 23,459
    edited March 20
    Higher profile tires may give you a softer ride at the expense of some handling capabilities. Take one home and see if it fits without all the potential problems listed above.

    While you’re on Tire Rack you
    can see if that size tire is compatible with you vehicle.

    2019 Kia Soul+, 2015 Mustang GT, 2013 Ford F-150, 2000 Chrysler Sebring convertible

  • qbrozenqbrozen Member Posts: 33,289
    We're talking about 11 mm here. Barely more than the difference between full-tread tires and bald tires.

    '11 GMC Sierra 1500; '98 Alfa 156 2.0TS; '08 Maser QP; '67 Coronet R/T; '13 Fiat 500c; '20 S90 T6; '22 MB Sprinter 2500 4x4 diesel; '97 Suzuki R Wagon; '96 Opel Astra; '11 Mini Cooper S

  • explorerx4explorerx4 Member Posts: 19,942
    I can say from experience that once I bought 2 cheap snow tires that were supposed to be the same size as the all season's they were replacing. There was no doubt that they were physically smaller than the tires being replaced.
    2023 Ford Explorer ST, 91 Mustang GT vert
  • oldfarmer50oldfarmer50 Member Posts: 23,459
    I once went from 65 series OEM tires on my car to 60 series without any problems and with slight improvement in handling. Might have been because they were new but it seemed so.

    2019 Kia Soul+, 2015 Mustang GT, 2013 Ford F-150, 2000 Chrysler Sebring convertible

  • capriracercapriracer Member Posts: 907
    oldfarmer50 said:

    I once went from 65 series OEM tires on my car to 60 series without any problems and with slight improvement in handling. Might have been because they were new but it seemed so.

    There is more difference between tires - meaning make/model - than there is between different sizes of the same tire. So if someone feels a difference after a tire size change, it's probably from the difference in the make/model tire.

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