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Old 11-06-2006, 10:05 PM   #1
69GMC910
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How big of a tire....

How big of a tire can be run on a 72 4x4. I am looking at a set of 31x10.5 Mickey T's. I would like to go taller and/or wider. When will I start to run into problems? I have 8" ralleys on the truck.

Thanks!
910
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Old 11-06-2006, 10:34 PM   #2
1969k10stepside
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Re: How big of a tire....

I have fit 33's on my truck before I put on the 6 inch lift.
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Old 11-06-2006, 10:40 PM   #3
dwaite72lnghrn
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Re: How big of a tire....

I have 33x12.50x16.5 on a '71 k20 and they rub the fender wells on a stock suspension. So I would think the 31" would fit without to much trouble. Not sure if the K10's have the same clearance as the K20's though.
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Old 11-06-2006, 11:02 PM   #4
1969k10stepside
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Re: How big of a tire....

31's will run with plenty of room.
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Old 11-06-2006, 11:58 PM   #5
Stocker
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Re: How big of a tire....

Quote:
Originally Posted by dwaite72lnghrn View Post
I have 33x12.50x16.5 on a '71 k20 and they rub the fender wells on a stock suspension.
I have the same, on a '72 K20. Many years ago, I notched the lower front fenders and clearance was good, though I also had add-a-leafs. I have since replaced the front springs with 2 1/2" Softrides.

No problem with 31" tires on stock suspension.
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Old 11-07-2006, 01:35 AM   #6
cheyenne10
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Re: How big of a tire....

One of the best riding stock trucks I ever drove was a 69 burb with 31x10.50x15 ATs. It was for sale in very decent on-frame resto for $4K. Man did I miss out on one there. (about 14 yrs ago)
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Old 11-07-2006, 01:42 AM   #7
69GMC910
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Re: How big of a tire....

So I guess I'll just stick with what I had originally planned!!! 31X10.5 it is!

Thanks everyone!
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82 GMC High Sierra
VortecPro 496
12 Bolt, 3.42's

AFR 265
Holley 850
Performer RPM Air Gap
Hooker 2455's
TCI Turbo 400 Super Street Fighter
TRRC 12 Bolt
Eaton Posi
Mark Williams Axles
Cal-Tracs
Hoosier 30x10.5 Radial Slick
Full weight long box pickup
Current best- 11.33@117mph
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Old 11-07-2006, 01:57 AM   #8
Canadian694x4
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Re: How big of a tire....

Got any pics of your truck 69GMC910?
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