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Go Back   Hummer Forums by Elcova > Hummer H3 Discussion Forums > Technical Discussion and Customizing your H3

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  #1  
Old 08-05-2008, 02:46 PM
Groundpounder Groundpounder is offline
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Default Tire

I have 49000 on the stock tires and the sidewall blew a leak. Glad it was sitting in the driveway when it went down. Need to get a good floor jack.
I have the standard P275/ and I want some more rubber on the road. I spend most of my time on the highway. If I go to P265/ I will get wider and a little taller. My question is - will it throw off my speedometer by much?
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2006 Slate Blue Metallic H3, FlowMaster exhaust, True Flow cold air intake system, Ground Force rear lowering kit, custom locking fuel door, chrome hood grill w/handle, US Speedo gauge kit (chrome and red numbers), Custom rear tire cover, chrome tail light guard, custom paint on skid plate, new pin stripping, USMC front license plate. Semper Fi
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Old 08-05-2008, 04:56 PM
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Default Re: Tire

http://www.discounttire.com/dtcs/infoTireMath.dos
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Old 08-05-2008, 11:47 PM
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Default Re: Tire

Quote:
Originally Posted by Groundpounder
I have 49000 on the stock tires and the sidewall blew a leak. Glad it was sitting in the driveway when it went down. Need to get a good floor jack.
I have the standard P275/ and I want some more rubber on the road. I spend most of my time on the highway. If I go to P265/ I will get wider and a little taller. My question is - will it throw off my speedometer by much?

not at all. It will be so minor!!! You could even fo to a 285 and still have your dealer change the calibration without issue and effecting mpg. Now if you went to a 315, you will be off about 6 mph at 55 and your mpg will decrease about 3mpg. hope that helps.
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Old 08-07-2008, 12:11 AM
Groundpounder Groundpounder is offline
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Default Re: Tire

Thanks for the help. I did go up to P285 and they are alot better than the stock ones. My dealer even threw in a set of chrome wheels for an couple hundred extra. Not a bad deal, however I noticed the front pads were getting thin so I had to get a brake job. Better sooner than later.

Thanks again for all the info.
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2006 Slate Blue Metallic H3, FlowMaster exhaust, True Flow cold air intake system, Ground Force rear lowering kit, custom locking fuel door, chrome hood grill w/handle, US Speedo gauge kit (chrome and red numbers), Custom rear tire cover, chrome tail light guard, custom paint on skid plate, new pin stripping, USMC front license plate. Semper Fi
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