Tire Size - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 18 (permalink) Old 03-04-2008, 10:30 PM Thread Starter
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Tire Size

Whats the biggest tire i can put on the stock rim. Im looking at 305/70/16 will they work?
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post #2 of 18 (permalink) Old 03-05-2008, 02:26 AM
 
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Yes but they will rub. The biggest tire I was able to run at stock height was a 285/75/16. They are both 33in tires but the 305/70/16's and about an inch wider and will rub when turning.
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post #3 of 18 (permalink) Old 03-05-2008, 08:01 PM Thread Starter
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Will they rub if I crank the torsion bars?
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post #4 of 18 (permalink) Old 03-05-2008, 09:07 PM
 
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Im pretty sure they will fit it you crank them all the way up. If not you might have to go with a leveling kit. I had 285/75/16 on my truck and they didnt rub at all until I put a ranch hand replacement bumper on my truck and the front end droped about 2in and then they rubbed. I had to crank mine all the way up to get it to turn with out rubbing. It was fine after I did that.
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post #5 of 18 (permalink) Old 03-05-2008, 09:47 PM
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The chevys seem to have more room than the GMC's due to a lower valance the GMC has that really limits going to a bigger tire.

I'd like to go to a 285 BFG A/T's when my stock skins get thin.
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post #6 of 18 (permalink) Old 03-06-2008, 07:55 AM
 
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on my gmc i just put 265/75 16 bfg mud and there is about half a inch between the tire and the front bumper. It looks close. lvling kitt sounds nice what do they run?

edit: when i turn the wheels there is about half a inch between bumper and tire
double edit: Its stock if that helps any, you prob will need to crak the bars.
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post #7 of 18 (permalink) Old 03-06-2008, 12:42 PM
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putting 305's on a 6.5 " wide rim, is unadviseable. 265 is the most I would do.

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post #8 of 18 (permalink) Old 03-06-2008, 01:26 PM
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Quote:
Originally Posted by wpboyce
on my gmc i just put 265/75 16 bfg mud and there is about half a inch between the tire and the front bumper. It looks close. lvling kitt sounds nice what do they run?

edit: when i turn the wheels there is about half a inch between bumper and tire
double edit: Its stock if that helps any, you prob will need to crak the bars.
Yep, 265's do fit. They came stock on my 3500. I think 285's will rub on a GMC, but might fit on a Chevy.
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post #9 of 18 (permalink) Old 03-06-2008, 02:30 PM
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Quote:
Originally Posted by 02sprtcumns
Will they rub if I crank the torsion bars?

Be careful when "cranking" the torsion bars, You need to make sure there is at minimum 1/2" between the bump-stop on the upper control arm and the frame. I cranked mine and had issues hitting the bump-stops quite often driving around town, made for a harsh ride. Finally broke down and bought cognito's leveling kit (new upper control arms and shock mounts).

Before you consider getting a ready lift or something of that sort get a price for new green keys and extended lower shock mounts, should be about 1/2 the price for the same equipment.

285's should fit, you might have to trim the plastic valance under the bumper a little. I've seen people that run 305's and 315's on the stock 6.5" wheels and I wouldn't reccommend it but it has been done.
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post #10 of 18 (permalink) Old 03-06-2008, 03:55 PM Thread Starter
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I pull a bass boat alot sometimes up to 500 mile at time i guess ill go with 285's
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