I drive a 2023 GMC Terrain SLE w/ Elevation pkg. Stock my tires are 235/50/R19 with 7.5" wheels.

Wondering what size tires (width, aspect ratio) I can downsize to for winter to save some $. I will likely go with 18 if I can… is going down 2 inches in rim inadvisable? Lastly, what wheel width should I go with for the downsized tire?

  • POSVETT@alien.topBEnglish
    1·
    1 year ago

    Find the smallest diameter wheel that will fit over the brakes. Mind the PCD, offset, and center bore parameters. Steel or aluminum doesn’t matter much, but the price is.

    I find oversized winter tires to boost ground clearance. Make sure they fit without interference. The width can be the same or narrower. Smaller diameter wheel necessitates taller sidewall. Check tire manufacturer website for OD of certain models and sizes.

    For example, my Nissan 370Z runs 235/55/18 GT Radial IcePro 3 that has an OD 2 inches more than the stock tire size. The wheel diameter is downsized 1 inch because the brake calipers need a lot of clearance.

    In your case, run 14" wheels if they can fit. Usually, the smaller the wheel diameter, the cheaper the tires. I have zero knowledge about the proper fitment of your vehicle wheels and tires; I can’t advise you what size combinations will fit.

  • Top_Midnight_2225@alien.topBEnglish
    1·
    1 year ago

    Depends on the car and how much is required to clear the rotors / brakes.

    One car I had I was able to go down 2" in diameter. Every other…1".

    Only one way to find out…

    For fun I checked TireRack and your vehicle (I assume AWD) offers a 17" wheel package as an option (225/65-17).