Bigger Tires on Stock Rims

[MRoberts]

Specifically, has any one put larger tires on the stock Laramie 20" wheels?

If so, what size, brand and model?

Did it mess up the TPMS?

Did you do anything to the suspension? Details please.

And of course, please post some pics!

 

[EDankievitch]

I've put larger larger tires on the 17" rims so the 20" rims will not be an issue as long as the tire is a load range E you can run the same air pressure and the TPS will not trip a Low Air pressure code. Just remember if you go to'a larger tire Dia you need to have the computer pinion off set adjusted or your speedometer will be off. I went from the 265-70-17" that my truck came with to the 275-70-18" that the 2014's came with and my speedometer was almost a 4 miles per hour slow at 55.

 

[alyoops]

Just got my Ram 2500 SLT Turbo Diesel. I traded in my EcoDiesel, no issues with it, but not good enough for towing even my 19 footer in the rockies. I now tow my 28 footer with the Ram 2500. Pulls like cutting butter. So far, all is well. I plan to install the BFG KO2 20 tires, all Terrain and snow flake symbol, from October on, we are required to have snow tires or tires with snow flake symbol. Love it on the Ecodiesel, but may have to look for another, not sure, if they have the rated load. I don't think, I have to make any adjustment to speedometer or TPS.

 

[American Adventurist]

Just remember if you go to'a larger tire Dia you need to have the computer pinion off set adjusted or your speedometer will be off. I went from the 265-70-17" that my truck came with to the 275-70-18" that the 2014's came with and my speedometer was almost a 4 miles per hour slow at 55.

I put 37's on my 2016 and the speedo is off by 5-6 MPH depending on speed (seems to be off more the faster I am going). When my speedo reads 70 MPH I'm really doping about 76 MPH per GPS. Obviously, this is also affecting the fuel economy calculations in the EVIC as I am actually travelling further with each tire rotation than what it sees.

My question is how does one adjust this "computer pinion offset" that you speak of?

 

[alyoops]

I put 37's on my 2016 and the speedo is off by 5-6 MPH depending on speed (seems to be off more the faster I am going). When my speedo reads 70 MPH I'm really doping about 76 MPH per GPS. Obviously, this is also affecting the fuel economy calculations in the EVIC as I am actually travelling further with each tire rotation than what it sees.

My question is how does one adjust this "computer pinion offset" that you speak of?

I talked to local dealer and they can make the necessary changes to match custom size tires.