Need some tire Info from the experts

[Silvertipgrizz]

I have a 2011 GMC Sierra w/the max trailer package, I'm currently running the stock 265/70R17 tires. I recently had a level kit installed and was looking at bigger tires. I was wanting to go to a 285/70R17 my question is am i going to cause problems with all the sensors going to a bigger tire?

[Wolfmanjohn]

Nope. Go for it.

[Silvertipgrizz]

Nope. Go for it.

 

 

Many Thanks, so no worries with having to recalibrate anything?

[Big Whiskey]

The only thing you may have to deal with is your sensors not liking the ability to run a higher PSI in your new tires (if they're an LT tire) compared to your stock (p-rated) tires. If, for example, the max PSI on your old tires was 44, and you run 55 psi in your new tires when towing....your TPMS will think you have too much air in them. It's an easy fix though...just have the tire shop (if they can) or your dealer change the 'magic number' on your TPMS to a higher number, depending on the load rating of your new tires.

[8.1HD/ALLISON]

If they can I would recalibrate the speedo, although it will only be off 2 mph at 60. Not a biggie.

[racerx520]

can have the speedo done from blackbear....and get a little more power / better shift points out too.

 

and i have 34" KM2's and been running them at about 55 PSI all the time (just found out that a year ago thats what the tire place put them to and i haven't touched them since) and i havent had any problems. No warning lights except for the one time i got a 3 1/2" screw in my tire and it went flat.

[Robert1]

The only thing you may have to deal with is your sensors not liking the ability to run a higher PSI in your new tires (if they're an LT tire) compared to your stock (p-rated) tires. If, for example, the max PSI on your old tires was 44, and you run 55 psi in your new tires when towing....your TPMS will think you have too much air in them. It's an easy fix though...just have the tire shop (if they can) or your dealer change the 'magic number' on your TPMS to a higher number, depending on the load rating of your new tires.

 

 

The sensors on that particular year model truck like mine only react to tire pressure that is significantly low. Even the manual won't say how low.A higher pressure will not cause any problems. I know this because I replaced my stockers right out of the box with BFG TA/KOs and run 45 psi all around. You can run them up as high as you want ,just not too low.

[Big Whiskey]

The sensors on that particular year model truck like mine only react to tire pressure that is significantly low. Even the manual won't say how low.A higher pressure will not cause any problems. I know this because I replaced my stockers right out of the box with BFG TA/KOs and run 45 psi all around. You can run them up as high as you want ,just not too low.

 

 

Well the max PSI on the stockers was 44, so it's probably ok with you running 45. However, I know first hand that some TPMS systems will trip the light if the pressure is too high. On my 2009 silverado, when I switched to 17" BFG's from my factory 20's (which were rated at 40 max, I believe) the tire shop put 65 PSI in the new tires....and it tripped the light. The service manager at my local dealer said that the system is set to look for a certain number...and too much variance from that number...either too high or too low...will set off the light. You probably just haven't had any problems because you're only running 1 PSI over the stock tires' rating.

[Robert1]

The door specs on my 2012 rig calls for 32psi front and 38 psi rear cold.That's on the max trailer pack 4X4 Silverado. I've run them up to 52 psi searching for the right pressure setting for optimal tread contact unloaded. Not sure what overpressure window the preset would be looking for as 52 psi would have been exceeding the design run pressure on the stockers and initiated no light .I've never run them down in pressure to see where a low pressure situation would initiate the light. Of course I keep the DIC on tire pressure most of the time anyway.

[Big Whiskey]

Yeah, I'm not sure how low or how high the PSI needs to be to trip the light. On my 2009, with 285/70/17 BFG's, I had the 'magic number' set to 45 PSI, that way I could run 38-40 when empty, and bump up to 50-55 when towing...and the light never came on.