Can I use 285 65 20

10

Asked by Nov 28, 2015 at 09:54 PM about the 2005 GMC Yukon XL 1500 SLT

Question type: Car Customization

I need a answer please

11 Answers

65,785

What is the stock size? You can compare tires with this handy tire size calculator ---- https://tiresize.com/calculator/

1 of 1 people found this helpful.
10

What is a stock size if you mean what is on now it's 17

1 of 1 people found this helpful.

Stock is 16". To get even close to your original gear ratios, use the calculator FoR suggested. You will have to go to an extremely low profile tire, causing poor ride, and stupid looking

3 of 3 people found this helpful.

https://www.google.com/search?q=2005+GMC+Yukon+XL+1500+SLT+&ie=utf-8&oe=utf-8 == Wheel size: 16″ diameter,

2 of 2 people found this helpful.

Your speedometer will read 65 mph at a true 73.5mph. Changing wheel/tire sizes is not so bad, but you are decreasing your gear ratios all the way through the spectrum it will tax your transmission. You NEED those lower gears to get going

3 of 3 people found this helpful.
65,785

Big wheels and tires are heavy and will increase stopping distances considerably. Heavier wheels and tires will also reduce ride quality as well. You could use the extra room that 20" wheels provide to install some monster Brembo brakes though.

1 of 1 people found this helpful.
65,785

FordNut is right. Big tires will reduce your towing and hauling capacity especially in the hills. It will also reduce acceleration and increase passing distances.

1 of 1 people found this helpful.
95,225

I am running 285/65/18 on my Yukon, it dropped my average mileage to 12.5 it was getting right at 14. It did change the way it shifts under normal driving but with the trailer tow setting that really isn't a problem for me, there was no noticeable difference with the ride or stopping distance but there is a lot of tire squealing noise when making slow turns like in a parking lot. I did recalabrate the speedo to accommodate the tire/wheel change. When they worn out I won't but anything that big back on it, just too much of a tire. HTH

1 of 1 people found this helpful.

One thing I can say with absolute certainty is you can trust tennisshoes advice.

2 of 2 people found this helpful.
65,785

I run 285's on my Ford F-150 which increases my ground clearance 1/2" and improves handling and off road capability quite a bit over the stock 265's.

1 of 1 people found this helpful.

As long as you put tires on that have the same outside diameter of the standard tires, the speedo will read correctly. You can put Low Profile tires on bigger rims, as long as the tread outside diameter is the same as the stock tire.

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