20-9" wheels..what's the biggest tire?? - Chevy and GMC Duramax Diesel Forum
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Old 03-22-2011, 09:13 PM   eBay Motors  #1 (permalink)
D04
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20-9" wheels..what's the biggest tire??

I've got some 20-9" wheels on my truck.. What is the biggest tire I can run on the without a lift..I've got some 275/60/20 on there now and am wanting a good AT. Idont mind a little trimming...

Thanks
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Old 03-22-2011, 09:16 PM   eBay Motors  #2 (permalink)
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a 35" can be done but you will need to crank the bars a start cutting...33" would be best
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Old 03-22-2011, 09:26 PM   eBay Motors  #3 (permalink)
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Im running a 305/55-20 on a 20x8.5 wheel. I barely cranked and did some slight trimming. It sits like a stock truck with the rear slightly higher than the front.
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Old 03-22-2011, 09:26 PM   eBay Motors  #4 (permalink)
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305/55/20 is the biggest i would go.
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02 GMC CC SB SRW 4x4 2500 Black MAX. 4inch MBRP turbo back Duals with 5inch tips, PPE Boost Increase Valve, AFE CAI, Turbo Mouth Piece Mod, 20x9 XD Black n Machined Hoss rims, 305/55/20 MT Baja Atz's,EFI DSP 5 tuned by Nick at DURAMAXTUNER.COM
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Old 03-23-2011, 06:18 AM   eBay Motors  #5 (permalink)
D04
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any pics of some 305/55/20 on trucks
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04 silver, LB7 ,ex-cab sb,painted H2s, custom front bumper, 20% all the way around, stage 4 suncoast, EFI live, 5" exhaust, FASS. Tuned by st. Joe diesel performance,
Tranny built by smokin diesel performance
I'm an ex cummins owner and need lots of info...:rockin
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Old 03-23-2011, 08:50 AM   eBay Motors  #6 (permalink)
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Here ya go

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02 GMC CC SB SRW 4x4 2500 Black MAX. 4inch MBRP turbo back Duals with 5inch tips, PPE Boost Increase Valve, AFE CAI, Turbo Mouth Piece Mod, 20x9 XD Black n Machined Hoss rims, 305/55/20 MT Baja Atz's,EFI DSP 5 tuned by Nick at DURAMAXTUNER.COM
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Old 03-23-2011, 09:36 AM   eBay Motors  #7 (permalink)
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Some of it depends on offset and backspacing also!
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Old 03-23-2011, 09:03 PM   eBay Motors  #8 (permalink)
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Is there a way to figure out my offset and baxkspacing? Idont want to drop a bunch of money on tires and have then rubbing like crazy
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04 silver, LB7 ,ex-cab sb,painted H2s, custom front bumper, 20% all the way around, stage 4 suncoast, EFI live, 5" exhaust, FASS. Tuned by st. Joe diesel performance,
Tranny built by smokin diesel performance
I'm an ex cummins owner and need lots of info...:rockin
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Old 03-23-2011, 09:54 PM   eBay Motors  #9 (permalink)
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It can be measured but I dont remember exactly how to do it, you may try googling it. I got mine off the sticker which was still on the inside of my wheels, but I also looked it up on the manufacturers website. What brand and series of wheels do you have?

Here is another pic with a 305/55. The trucks kind of dirty plus its a cell phone pic, but its the newest one I have since some upgrades...
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2006 CCSB LBZ 4x4- Turbo-back 4 inch w/ 5inch tip, K&N intake, EFI Live DP5 by Diesel Addiction, EGR delete, TransGo Jr, Allison Deep Pan, Suncoast Filter Lock, MA Pump Rub Kit, Ipod Aux-in, Weathertech mats, All On Headlight mod, Tow Mirrors, Line-x, B&W Gooseneck hitch, Autometer Sport-comp II Boost and Pyro, 20% tint, Bilstein 5100's, Pacer NBS Smoked Cab lights, 20inch Eagle Alloys, 305-55-20 Trail Grapplers

Last edited by sifd4x4; 03-23-2011 at 09:58 PM.
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Old 03-24-2011, 05:40 AM   eBay Motors  #10 (permalink)
D04
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i have some Ultras. they have about a 4in dish if i was guessing.
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04 silver, LB7 ,ex-cab sb,painted H2s, custom front bumper, 20% all the way around, stage 4 suncoast, EFI live, 5" exhaust, FASS. Tuned by st. Joe diesel performance,
Tranny built by smokin diesel performance
I'm an ex cummins owner and need lots of info...:rockin
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