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09-08-2015, 10:41 PM
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#1 |
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Active Member
 Join Date: Jul 2012
Location: Lake Charles la
Posts: 172
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Wheel and tire sizes HELP
I need help in figuring out what the biggest tire I can put on my 1975 K5 with Factory suspension?? 6" or 8" wide rims and back space info please let me know what you guys are running! Thanks
Last edited by Belairboy55; 09-08-2015 at 10:42 PM. Reason: Photo |
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09-09-2015, 08:52 AM
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#2 |
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I know the pieces fit
Join Date: Nov 2007
Location: MONTGOMERY, AL
Posts: 5,523
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Re: Wheel and tire sizes HELP
On stock 8" rally wheels you can run 33x12.50's with no lift with little to no rubbing. I've never tried it, but supposedly they won't rub on the street but might rub a little if you off-road it. Nice truck!
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09-09-2015, 10:19 AM
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#3 |
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Registered User
Join Date: May 2012
Location: Colo Springs, CO
Posts: 870
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Re: Wheel and tire sizes HELP
I second the 33's and the stock, rally wheels (15x8). You might add a 1" lift in the back to help with the typical sagging rear end (assuming you have it). Get new u-bolts too if you add the block.
__________________
- Jeff 89' K5 Blazer, 2.5" lift, 35" tires  04' GMC Yukon XL, 3/4 ton, 8.1L |
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09-09-2015, 02:23 PM
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#4 |
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Active Member
Join Date: Jul 2012
Location: Lake Charles la
Posts: 172
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Re: Wheel and tire sizes HELP
What back space are those 8" wide rally's?
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09-09-2015, 03:04 PM
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#5 |
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Registered User
Join Date: May 2012
Location: Colo Springs, CO
Posts: 870
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Re: Wheel and tire sizes HELP
I think it's around 4".
Here is my 2.5" lift and 33x12.5 on stock wheels.
__________________
- Jeff 89' K5 Blazer, 2.5" lift, 35" tires 04' GMC Yukon XL, 3/4 ton, 8.1L |
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09-09-2015, 10:45 PM
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#6 |
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Registered User
Join Date: May 2011
Location: fargo nd 58104
Posts: 27
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Re: Wheel and tire sizes HELP
Stock height. Stock rims. 32/11.5s no rub.
__________________
____________________ 1967 Chevy C10 SWB 2WD 350/Auto 1969 Chevy C10 SWB 2WD I/6 3 on tree 2001 Trans Am WS6 6spd 2010 Chevy Tahoe 4WD 1991 GMC Jimmy 4WD all original 84K miles |
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09-10-2015, 10:26 AM
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#7 |
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Registered User
Join Date: May 2012
Location: Colo Springs, CO
Posts: 870
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Re: Wheel and tire sizes HELP
Just to note....the aluminum factory rims are actually 15x7 and slightly different backspacing. Also, I did ask Discount Tire to mount 33x12.5 tires on the 15x7 wheels and they told me they were unable to do it. Hence the 32x11.5 tires.
Just FYI for you. I do like the aluminum ones but opted for the Rally's.
__________________
- Jeff 89' K5 Blazer, 2.5" lift, 35" tires 04' GMC Yukon XL, 3/4 ton, 8.1L |
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09-10-2015, 04:16 PM
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#8 |
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Active Member
Join Date: Jul 2012
Location: Lake Charles la
Posts: 172
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Re: Wheel and tire sizes HELP
What is the actual back space on your aluminum wheels??? What is the back spacing on the factory 1974 CHEVY blazer wheels on 4x4??
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