Tire size question

[Aces11]

A couple of my vehicles have similar sized tires. One is 255/65/17 and the other is 245/65/17. I am getting to the point I will need to replace the 255/65/17 tires. I like the 245/65/17 tires on the one vehicle and can’t find it in the 255/65/17 size. So I am thinking of replacing the 255 with a 245 tire? The vehicle is a 2021 GMC Acadia AT4. Good, bad, ugly?? Thanks!

 

[Steve300xcw]

They both seem pretty small

 

[Aces11]

They are small tires, with very little difference in size. Just not sure if it’s something a guy should do or not.

 

[Slickhill]

It will be fine.

 

[SloppyJ]

Tire Size Calculator

Free calculator to find the dimensions of a tire based on its code. It also helps in choosing alternative tire sizes based on rim size or comparing two tires.

www.calculator.net

 

[alexnelon]

They’ll fit just fine. You’ll lose a little over a quarter inch of sidewall.

I bet you could fit 265/65R17s without having to tear out the fender liners but don’t take my word for it.

 

[Aces11]

Thanks for the input fellas!

 

[Dave Thomas]

Replace them with the size the vehicle calls for. If you want to run the smaller ones make sure you can program that size into the abs module. Even a small change can effect a lot more than you think. The place installing the tires should be able to do it if gm offered that size. Just about any scan tool that's not just a generic obd2 code reader should do it.