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River_Hill's avatar
River_Hill
Explorer
Dec 28, 2017

Truck Wheel Size

Looking at some new trucks and have the option of 17", 18" or 20" wheels. Any reason to go with one over the other? I think the 17" might do a little better off-road as the tire would have more flex.

35 Replies

  • 20 inch replacements are much more expensive if you can find what you want in the first place. I don't know if there are more 17 or 18 tire types but there are plenty of 18 inch tires by lots of manufacturers and you get better load ratings. I don't even recall if 17 was an option with a HD truck. With a pickup it's a different story.
  • You will have more tire size and load range choices with 17" including AS/AT and MT type tires. The wifes 2016 1500 chevy with 17" wheels has any size and tread type available.
    I see 1/2 ton owners with the 20" options can't find a good LT replacement other than a high price LT E.

    Now if you have a 3/4 or one ton truck the 17" tire sizes don't have the capacity for a 7000 lb rear axle unlike 18" and 20" tire sizes.
    There are more 18" tire sizes/load ranges than 20" tires.

    Check out 17"/18"/20" tire prices on tirerack.com
  • 17 inch tires and rims generally have the lowest load rating. Go with an 18 if you are concerned about airing down while still having a safe load rating.
  • I agree the 17" would be better off-road . The 20" should build up less heat in the sidewalls at interstate highway speed.