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305/50/20 - Yes or No?

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Old 04-03-2008 | 10:26 PM
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Default 305/50/20 - Yes or No?

wondering if 305/50/20s would fit fine without any rubbing issues. im a 4wd tahoe that will never be lowered. making sure they would work in the front mostly to avoid ripping my inner fender liner out turning the wheel lol. anyone running these wide *** tires?
Old 04-03-2008 | 10:35 PM
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I used to run them and had to place 2 zip ties to pull the inner fender wall away from the tire. Worked great. There was a huge difference when I changed from 305 50 20 to 275 45 20 in the performance dept. Something like a .5 drop in ET.
Old 04-04-2008 | 02:39 AM
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my 285/50R20's rub on the 2500 sub, newer body style, but at the same time I'm gonna guess a 2500 is higher up than a 1500. I'd think they're gonna rub.
Old 04-04-2008 | 02:52 PM
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well i know the factory 20 runs a 285 width and 305 isnt a huge difference.
the 305 is .4 inches taller side wall, .8 inches wider, and .8 inches bigger over all diameter. thats not really THAT much bigger. i see wheel/tire packages for sale online for tahoes/silverados all day that sell 305s in 20s and 22s but wanted to know for sure.
Old 04-04-2008 | 08:39 PM
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Certain 305/50R20's will rub and others will not. It's all in how the shoulder of the tire is designed. Take for example the Goodyear Eagle GT II and the BFGoodrich All-Terrain both in the 305/50R20 size. The All-Terrain has a relatively aggressive shoulder with tread sticking out that usually catches the inner firewall side fender plastic, where the Goodyear tire has a nice rounded shoulder for all the road queens.

To answer the question asked...yes they fit, but as I just said it depends on the tire. Today I mounted up those Eagle GT II's on a stock Z71 Avalanche 1500 in the 305/50R20 size and they fit perfectly, no rubbing on flat surfaces. I would venture to guess there is mild rub when navigating angled surfaces like driving up a driveway at an angle, but for the most part when does your daily commute require articulation?

These are tires that I know for sure fit without rubbing, in a 305/50R20 size. If you purchase an odd-ball rim backspace/width, take my recommendations with a grain of salt and measure for yourself. These are based off of OEM 20" wheels.
-Goodyear Eagle GT II
-Nitto NT420S
-Nitto Terra Grappler AT (requires ziptie method mentioned above just to hold back inner fender well plastic)
-Michelin Cross Terrain SUV
-Michelin Latitude Tour HP
-Pirelli Scorpion STR
-Yokohama Parada Spec-X

All others have either too aggressive tread to fit without a lot of trimming, or require a slight lift. But if you're lifting your truck, why are you slapping on 305/50R20's in the first place?
Old 04-04-2008 | 08:43 PM
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Originally Posted by tarinitup
There was a huge difference when I changed from 305 50 20 to 275 45 20 in the performance dept. Something like a .5 drop in ET.
Less rotating mass, less drag, and improved final drive ratio to allow the motor to rev up quicker. That would be my guess as to why the ET quickened.
Old 04-06-2008 | 03:46 PM
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thanks alot *InchUp*. i never said i was raising the vehicle, i said i would never LOWER it (thus causing for issues for rubbing). so i should just probably do 285/50/20 after all to be 100% safe. the 305s would just look a little tougher. not the end of the world tho.
Old 04-06-2008 | 04:14 PM
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Originally Posted by 11secondhorse
thanks alot *InchUp*. i never said i was raising the vehicle, i said i would never LOWER it (thus causing for issues for rubbing). so i should just probably do 285/50/20 after all to be 100% safe. the 305s would just look a little tougher. not the end of the world tho.
They will suit you well. Little wider than stock, but same general diameter. I think you'll have quite a few more tire choices too along with lower tire prices. Always good.
Old 04-07-2008 | 01:08 AM
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my 285/50's that rub are terra grapplers, lil more aggressive for side blocks as well. Hell the rears even rub when I have the truck leveled (read as 2 motors or the 24 foot trailer on it, or an avalanche on an open trailer with no weight distribution) and do lane changes or any sort of side to side movement, nothing bad, just the fender liner trim in the rear, and its not full lock but close to it in the fronts. Whatever...you wanna run rough tires and bigger tires you just suck it up....kinda like the whine from the blower, someone asked me if i was in low gear the other day.

my buddy is throwing the same size on his 03 avalanche once we get the motor swap done and get it the hell off my lift, he's using OEM silverado ss wheels...
Old 01-20-2010 | 12:46 AM
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Default yukon 20 inch wheels with all terrain tire?

I have an 04 yukon stock and am looking to do a 20 inch wheel with a bf goodrich all terrain TA/KO....ideas and thoughts about clearance or looks?



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