sbv32

Hello All,

I will be in the market for a pull behind in the next couple years and currently in the market for new wheels and tires.

Initially the first thing to pop in my head is level the ride and get some bigger tires. Now after endless reading I don't think it is that easy. My knowledge is very limited however what i am finding is that the 3.55 Gear is not best with larger tires and wheels. Question is with my 3.55 what is the largest tire one would suggest that would not cause the negative effects of less power, sluggish, etc.

In addition there seems to be a split on level kits and towing so i am thinking of keeping the stock suspension and just looking at different tire and wheel combos that will work. From my reading I believe that the stock wheel is 20x8 with somewhere around a +44 offset (please correct me if i am wrong). if i went to a new wheel with the stock set up could i move it to a 20X9 with +20 offset (from what i can see this is the largest offset for the wheel). If i did this what would be the max tire size i could run with stock suspension?

I bought a truck to get the job done so if i need to keep is as is i have no issues doing that. I would like it to be able to get er done and look awesome also.

Thank you all in advance for the input!

lewisra

I'd suggest load rated E tires.

berty

Increasing tire size is always going to negatively impact your towing. Not saying it will keep you from towing but it might make it less enjoyable. How often and how much will you be towing?


Also, could be wrong but I think stock wheel is 8.5 wide

sbv32

would I be able to fit 285/55/20 on stock suspension? or should I stick to the stock size?

Allen Whistler

level kits and towing is not good unless you bring the rear up to match with a heavy hitch weight you will be tail down and front up that will cause a lot of trailer sway.

sbv32

Awesome, thank you. assuming the timbren would take care of that?

BRUTE448

i had the FX4 20" wheels. i was going to from 275/55/R20 31.9 x 10ish to 290/60/R20 33.9x 11.2ish...instead i now have 18" fx 4 wheels and already isntalled a moto fab 1.5" front level and a 2" rep. rear block (1.25" is stock) i like the look but decied not to do tire till next year. ill be going to a 275/70/R18 33.3 x 10.8 from the stock 275/65/18 32.1x 10ish.

with my 3.73 gear going to 275/65/18 to 275/70/18 my efective ratio will be 3.60 which i can deal with vs going to a 295/70/18 34.3 x 11.6 < which looks BADSSS but wood make my gearing 3.47

Norotso

Here is a good site to play with different tire sizing and also gearing based on new tire size. As others have mentioned going bigger reduces gearing making for less effective pulling. Also note that typical P rated tires are around 40-42# each, while a 10 ply LT-E rated tire is ~50-55# each, so not only do you lose gearing but you also increase rolling resistance and dead weight in the tire which is going to further hit your mpg!

Off to the left beside the tire brands listed is different links to tire sizing, gearing etc.

https://tiresize.com/comparison/
https://tiresize.com/gear-ratio-calculator/

sbv32

Awesome info. Now if I increase the tire size by 1inch (275/60/20) it is telling me that I will have effective gear ratio of 3.43 I'm sure this is awesome info however I don't know how to interpret it 😀

Norotso

3.43/3.55=0.966 or that you have now decreased your gearing by 3.38%. Not bad considering....