Tires question for 20" rims

[iceman1998]

Hey guys i'm looking for a little direction. I have a 2007 GMC Sierra NBS. The truck is completely stock other then a Rough country 2" leveling kit. The truck came from the factory with 20" rims and it also has wheel sensors to monitor the tire pressure. The stock tires on the rims are 275/55R20. My question is i'm thinking for putting a larger tire on to replace the Goodyear eagle LS2's. i want to put a set of BFGoodrich All Terrain's on. If i go larger it that mess and computer monitored things up? i would like to either go 275/65R20 or 285/65R20 will this screw anything up?

 

thanks in advance!

[RyanbabZ71]

moving to the correct forum

[Chris]

Speedometer, needs to be recalibrated. With a level a 275/60 or 285/55 word be nice. Its just at the 33" mark. Your stock tires are 31.9"

 

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[iceman1998]

can the dealership recalibrate the new tire size?

[tobias]

can the dealership recalibrate the new tire size?

 

 

Yes but you're better served getting a custom tune from Black Bear Performane which includes adjustment for your new tire size.

[iceman1998]

yeah i know, but i don't think there anyplace here (ontario, canada) that does that

[tobias]

Black Bear Performance can do it multiple ways without being there in person.

 

http://blackbearperf...om/services.asp

 

You'll either want the "Scan Cable" or "AutoCal email" tune. I'd suggest the AutoCal for future updates, dealer visits and code reading. That's what I have for both of my Tahoes.

[iceman1998]

what does the BB tune do exactly? And if i don't do a BB tune what do i need the dealer to reprogrammed?

[Chris]

I'm not sure a dealer could program a non stock size. A black bear tune unchains the truck. Drivability is vastly improved.

 

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[blackout07]

275/60 and I wouldn't worry too much about a tune, unless its something you want.

[iceman1998]

no i'm not really interested in a tune. The only thing i was worried about was it going bigger will screw up anything.

[tobias]

It won't screw up anything, it'll just make your MPH a little off. A little. If you have GPS on your phone or elsewhere, use that to figure out what your new 55, 65, etc. are.

 

You should consider a tune though, still. You gain HP, MPG and driveability all in one fell swoop.

[Ridgeback1]

285/55/20 BFG AT is what you want..!

 

Just went through a set, good size, no problems!

 

Might lose 1 mpg and some cornering compared with Goodyear LS2.