blueinterceptor

i currently have 275/55r20 tires on my 2010 suburban

can i put 275/60r20 tires on it.


what effect will it have and will it allign with the stock rim (alumin 5 spoke)

how will it affect the ride

RacerX

The ride will be the same, the alignment is the same. All you did was to add a tire with a sidewall a bit wider.

Sweet look though, those tires must be butt load of expensive?

blueinterceptor

Will they fit without any modifications

JRacer

Sidewall height is a function of tire width.

The difference in the sidewall height is 55 percent times the width of 275mm vs 65 percent of the width. So a 275 55 has a 5.95 inch sidewall while a 275 65 has a 7.03 inch sidewall. The factory 20's are 275 55 which is the 5.95 inch sidewall. and the whole assembly would be 20 + 5.95 + 5.95 = 31.9 inches. The sidewall math is 275mm width X .55 (55 percent) divided by 25.4 (mm/inch). I doubt that you can go more than the 55's and still have clearance. Gong to a 65 with the same width tire, your wheel and tire will increase by 1.08 inches all around (2.16 inches diameter)
My 2010 Suburban has the 265 70 17's which is a 7.30 inch sidewall. So my wheel and tire are 17 + 7.30 + 7.30 = 31.60 inches diameter and I don't have a lot of room left before I rub the front bumper. Maybe an inch in front of the front tire. I went round and round on this as I wanted to gain some ground clearance but I found that if I went to the 20's I had to trade off all of the gain in rim with shorter sidewalls for a net little or no gain - the wheel opening and steering ranges are the constraints.

A 275 60 20 will have a 6.49 inch sidewall and the assembly will be 20 + 6.49 + 6.49 = 33

And, it is not just the diameter in the front and back that will be a problem, you have to check to see if it rubs anywhere when turned lock to lock.

The taller sidewalls will generally ride better on rough surfaces.

Hope that helps explain it. I now know more about tire sizes than i really planned to.

Zed 71

You will need a level kit and maybe some minor trimming (depending on wheel offset). I have 285/65/18s (32.6" diameter) with a 2.5" front and 1" rear level kit. I had to trim the front wheel wells by ~2 inches.

Yes, your ride should be slightly softer.

JRacer

Similarly, I put a 2.5 inch front 1.25 inch rear lift/level kit on mine from "Truxx" to increase my ground clearance. Knocked the front bumper off it twice driving through cattle pastures. Once replace, once repair. Not fun.

73shark

Before you actually trim the wheel liners (if rubbing occurs), try reshaping using a heat gun. Others have done this successfully for minor rub issues.

blueinterceptor

Ahh well. I do not want to make changes. I was considering the Michelin at2 but they
Do not have the factory size. Going to go with silent armour or Michelin ms2

Zed 71

I wish only a heat gun was required in my case. At full lock and flex, it would have taken off the the front bottom valence bumper cap. I do take it offroad frequently so I needed to make sure there were no issues. To make 285/65/18s work on stock rims, I had to trim 2 inches of those valence caps.

JRacer

Post some pics please