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12-21-2022, 04:13 PM
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#1 |
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Registered User
Join Date: Dec 2018
Location: Dallas, PA
Posts: 551
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Rear tire 20inch fitment ?
Will a 275/40/20 tire fit the rear of my fleetside, it has been lowered 4 inches
4.75 inch backspace 28.7 inch diameter, If not, what is a good size for a 20 inch wheel in the rear. Last edited by kens65fb; 12-21-2022 at 05:31 PM. |
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12-21-2022, 08:56 PM
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#2 |
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Senior Member
   
Join Date: Jan 2018
Location: Hickory Flat, GA
Posts: 4,491
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Re: Rear tire 20inch fitment ?
Stock 12 bolt or slightly wider axle from a later year truck?
__________________
Christian Carpenter 1963 C10 - Frankentruck 283, Muncie 3 speed with overdrive Overdrive wiring here1963-ish truck bed trailer - Half-Wit 1981 C10 - Penny 305, th350 --> Soon to be 350, Saginaw 4 speed 1995 Dodge Dakota Sport "I'll put it simple: if you're going hard enough left, you'll find yourself turning right." - Doc Hudson |
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12-22-2022, 08:44 AM
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#3 | |
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Registered User
Join Date: Dec 2018
Location: Dallas, PA
Posts: 551
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Re: Rear tire 20inch fitment ?
Quote:
Currently using 275/60/15 on the rear, they are tight, but don rub. |
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12-22-2022, 10:30 AM
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#4 |
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Registered User
Join Date: Apr 2001
Location: DALLAS,TX
Posts: 22,068
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Re: Rear tire 20inch fitment ?
There's never an exact answer for these questions. What fits on 5 different trucks might have issues on 5 other trucks because of subtle variances. What's the BS on the 15's?
If the wheels are the same width & BS, only the height is slightly different. At only 4" of rear drop, that change shouldn't be an issue. There can be minor size variances between similar section width tires (275mm), especially when using different diameter combos w/different aspect ratios (40 vs 60). It comes down to where the new combo will sit relative to where the old was & the amount of clearance the old combo has.
__________________
67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
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12-24-2022, 10:11 AM
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#5 | |
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Registered User
Join Date: Dec 2018
Location: Dallas, PA
Posts: 551
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Re: Rear tire 20inch fitment ?
Quote:
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12-24-2022, 01:14 PM
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#6 | |
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Registered User
Join Date: Apr 2001
Location: DALLAS,TX
Posts: 22,068
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Re: Rear tire 20inch fitment ?
Quote:
To 100% verify, set the truck up w/some jack stands so the rear end is compressed/has weight on it but off the ground. Tape some 2x4 blocks to the tire/s, spin the wheels/tires & see what happens.
__________________
67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
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