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#1
05-19-2006, 05:56 PM
Hummer Veteran
Join Date: May 2006
Location: Pacific Northwest
Posts: 88
Tire Size
Just installed some 37" BFG All-Terrains... for giggles I put a measuring tape on them... the height actually measures 35" -- barely. How the heck do tire manufacturers calculate their measurements... I neved did check the actual tire size of my old 35"s. Just curious...
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#2
05-19-2006, 07:02 PM
Hummer Guru
Join Date: Jan 2006
Location: Fairfax, VA
Posts: 2,061
Re: Tire Size
Quote:
Originally Posted by tbuckley
Just installed some 37" BFG All-Terrains... for giggles I put a measuring tape on them... the height actually measures 35" -- barely. How the heck do tire manufacturers calculate their measurements... I neved did check the actual tire size of my old 35"s. Just curious...
Are you measuring the ones supporting the vehicle? If so, the bottom of the tire is deformed.
#4
05-19-2006, 08:23 PM
Hummer Guru
Join Date: Jan 2006
Location: Fairfax, VA
Posts: 2,061
Re: Tire Size
37"x13.5" Cooper STTs.
#5
05-19-2006, 10:15 PM
Hummer Messiah
Join Date: Apr 2003
Location: Virginia Beach
Posts: 37,474
Re: Tire Size
They'll rub just a little as you can see in hawk's pic. Nothing to worry about.
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#7
05-22-2006, 05:54 PM
Hummer Veteran
Join Date: May 2006
Location: Pacific Northwest
Posts: 88
Re: Tire Size
Quote:
Originally Posted by PhilD
Several factors will effect actual height, mainly; the weight of the vehicle, the tire pressure and rim width. Manufacturers will measure the tire without any load on it, sometimes at max psi and the height will be for a specific rim width. Add a load, lower the psi, and/or use a different rim width and your measured height will be different.
My 38's only measure 36.75" when on the vehicle.
Phil -- THAT was the help I was looking for. I figured that pressure, load weight, rim size, etc. would account for various standing sizes. Appreciate your help. The rack and ladder look fantastic -- thanks! Rancho lift went on great... I'll submit pics ASAP.
__________________
May your glass be ever full.
May the roof over your head be always strong.
And may you be in heaven half an hour before the devil knows you're dead. ~ Irish Blessing
Last edited by tbuckley : 05-22-2006 at 06:01 PM.
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