Wheel Size Question

TheMythofUtica · January 19, 2005

I have an OBS 1999 Yukon 4x4, as some of you may know. I have always liked those rally style rims from the 80's - the ones you'd always find on K5 Blazers. My question is can I run 15" wheels on my truck (which comes stock with 16")? Would any mods be required? If anyone has any ideas or experience to share, please do so.

By the way I tried a search first - couldnt find what I needed.

Thanks for the help!

Yukon04 · January 19, 2005

Adjust speedo via re-programming. Should not be a problem.

Bigrob · January 20, 2005

I have an OBS 1999 Yukon 4x4, as some of you may know. I have always liked those rally style rims from the 80's - the ones you'd always find on K5 Blazers. My question is can I run 15" wheels on my truck (which comes stock with 16")? Would any mods be required? If anyone has any ideas or experience to share, please do so.

By the way I tried a search first - couldnt find what I needed.

Thanks for the help!

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i was wondering the same thing about my 2004 sierra but i read that 15 dont have the room to clear the brake calipers. i dunno about your truck but try taking your wheel off and measuring

mcreyaufmiller · January 20, 2005

There are a few things to look at. first, by downsizing the wheels, you will be turning a higher RPM to get to the same speed (unless you get bigger tires to match the diameter of the orignal tire/wheel combo, then you would not have to reprogram your speedo). Second, you have the clearence problems, if the calipers and discs are larger and require the additional space, the 15's just will not fit. Other than that, I think you have a great idea. Another way to accomplish this is to put 16" ralley reproductions on the truck. I think Year One or one of the other reproduction parts houses may have them in the larger sizes.

99-2door · January 20, 2005

15s will fit on your OBS Tahoe/Yukon.

They will not fit on NBS trucks and SUVS without clearancing the calipers.

As far as the speedo recalibration Wheel size doesn't matter, it is the overall tire diameter that makes the difference.

pgbz71 · January 20, 2005

I doubt 15" will fit. I had a '97 Z71 that I was upgrading the rear to disc brakes off a '01. The stock 16" rims from the '97 wouldn't clear the calipers. It didn't make sense since the '01 also had 16" rims. I crawled under a friends '02 truck and looked at the rims. Later model factory rims have a radius in the back of the rim to clear the calipers which the '97 rims didn't have. So not all 16" rims would fit either.

99-2door · January 20, 2005

I doubt 15" will fit. I had a '97 Z71 that I was upgrading the rear to disc brakes off a '01. The stock 16" rims from the '97 wouldn't clear the calipers. It didn't make sense since the '01 also had 16" rims. I crawled under a friends '02 truck and looked at the rims. Later model factory rims have a radius in the back of the rim to clear the calipers which the '97 rims didn't have. So not all 16" rims would fit either.

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Yes, this is true. But a 99 Yukon is OLD BODY STYLE just like your 97. The front disc and rear drums are much smaller than the newer trucks. Even 15" rims will fit on the OBS trucks.

TheMythofUtica · January 20, 2005

Thanks for the input guys, I wish I could get a confirmation though.

potz1999 · January 20, 2005

Here is your confirmation...they fit. My buddy had a '98 K1500 and ran 15" rims no prob.

99-2door is totally right. fits obs (98 and prior pickups and 99 and prior SUV's)

does NOT fit nbs (99+ pickups excluding Classic and 00+ SUV's)

your obs Yuk probably has like 265/75R16 or 265/70R16 or 245/75R16 tires (or somewhere close to that) so just wrap those 15" rims in 31X10.50R15 tires and you'll be good to go.