Tire size

[treehan77]

Changing from 16" stock wheels to stocks from a 2014 Yukon 17". Stock tires 265/70R16. Should I choose 265/70R17 or 265/65R17 and why? I know the 65 series will be almost exact match as far as speedometer, but 70 series being 2 mph off at like 60-65 doesn't seem bad either, and would maintain sidewall. Thoughts?

 

[massivespl]

I'd get a 275/70/17... That's what my 2002 z71 came with

 

[Eric70]

I would do the 70 series too, mainly because there's more tire options in that size.

 

[treehan77]

What I dont understand is: did yukons with the optional 17" wheels (which apparently came with 70 series tires) have a different speedometer calibration that the same model with 16" rims, since the diameter of the tire is about 3% different? If so, how can I recalibrate my speedo if I wanted to?

 

[massivespl]

What I dont understand is: did yukons with the optional 17" wheels (which apparently came with 70 series tires) have a different speedometer calibration that the same model with 16" rims, since the diameter of the tire is about 3% different? If so, how can I recalibrate my speedo if I wanted to?

Your speedo should be fine with those tires. With my 305/30/26 which are like 33.5" tall my speedo is off 1-2mph at 60.

 

[YukonXL04]

Your speedo should be fine with those tires. With my 305/30/26 which are like 33.5" tall my speedo is off 1-2mph at 60.

Must be nice, mine with 275/65r18 is off 5 mph at 65. I'm guessing my speedo was off before and the tires just made it worse

 

[treehan77]

Must be nice, mine with 275/65r18 is off 5 mph at 65. I'm guessing my speedo was off before and the tires just made it worse

what was your stock tire size?

 

[treehan77]

So nobody knows if a factory 17" wheel has a different speedo calibration than the factory 16"? Or how to recalibrate?

 

[treehan77]

i guess nobody knows...

 

[mwilson62000]

Yes, they have different calibrations, that can be recalibrated using a tech2 scan tool. My 03 originally had 265/70/16 tires. I went to 17 inch wheels with 265/70/17 tires and with tech2 my neighbor has recalibrated tire size in the software. I just got new 18" wheels and upgraded to 265/65/18. The difference in size was so minimal that I haven't recalibrated.

Obviously the dealer could recalibrate for you, but I'm sure they charge way to much. Check out any local shops that may be able to do it. Takes all of 5 minutes to do.