Running non-stock Tire Sizes

[NC04Tahoe]

I have an '04 Tahoe but it has '07 Tahoe rims and tires, 265/65 18. I am not sure what size it should have but I know that these are messing up my speedo and odometer. Aren't these larger than stock? Shouldn't I be going faster than what the speedo shows? But I am not, the speedo says 60 but my GPS shows 58.

Has anyone had their computer reprogramed for different tire sizes, how much did it cost? Thanks.

 

[Sasquatch]

There were two options for your tahoe, 275/60/16 or 275/60/17.

There are some handheld tuners that can correct tire size but in my opinion you should get a blackbear tune. justin can correct the tire size and a whole lot more. you`ll be happy you did it. i know i am. if i remember correctly a tune costs $250.

 

[Bailey-Hoe!]

How off was yours?

There were two options for your tahoe, 275/60/16 or 275/60/17.

There are some handheld tuners that can correct tire size but in my opinion you should get a blackbear tune. justin can correct the tire size and a whole lot more. you`ll be happy you did it. i know i am. if i remember correctly a tune costs $250.

When you went to the 'NNBS' LTZ 20" wheels, how much did your speedo change?

 

[Eagle]

Mine is now dead nuts accurate. (275/55/20)

What GPS? some are themselves off 1-2 mph.

 

[sully]

I have the wheels and tires off my buddies 07 Tahoe on my 2003, my speedo is off by 2-3 mph over what it reads. The overall size is 1 inch taller than the stock ones from our body style so there isn't much of a difference.

I have noticed that my front drivers side tire rubs the inner fender when reversing and turning hard right but it isn't going to stop me from using them. I needed the 17" wheels to lower the Hoe with spindles in the front and now I think I'm just going to bag it so it doesn't matter anymore.

 

[DirtyBlackHoe]

There were two options for your tahoe, 275/60/16 or 275/60/17.

There are some handheld tuners that can correct tire size but in my opinion you should get a blackbear tune. justin can correct the tire size and a whole lot more. you`ll be happy you did it. i know i am. if i remember correctly a tune costs $250.

Pretty sure the stock size tires was 265/70?