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Power Stroke Excursions Technical discussion of the Ford Excursion SUV with the Power Stroke diesel.

       
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Old 04-28-2007, 11:10 PM   #1 (permalink)
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Another Tire Question

I know you all have heard the tire questions over and over...I apologize up front.

I've lifted the front of my X with W code springs with a home-made "leveling kit" comprised of an additional long leaf from the rear Excursion spring pack and two shorter leaves ala DR. It rides well and I like the firmness without it being too harsh. Crazy thing - the wife likes it too! The front wheelwells sit at 41 3/4" on a set of borrowed 285/75-16s.

I'd like to put on the tallest tire I can mount with minimal rubbing with the current lift - I expect a little rubbing at the spring and I plan to move the bumper out a little also. I'm eyeing the old Buckshot Radials (Coyote tread pattern) in 305/85-16 or getting a set of some other brand's 315/75-16s. I've used the Buckshots before on my Ramcharger (3 consecutive sets) and liked them. I prefer the tall skinny tire look. Do you all think they'll fit (and I take the chance and order them) or should I just go with the 315/75s?

Awaiting your opinions.

Ty
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Old 04-30-2007, 07:00 PM   #2 (permalink)
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Re: Another Tire Question

Nobody touching this one! Okay, let me re-phrase. How are you all with 315/75-16s doing for clearance and how much lift do you have? I intended to run the 305/85-16s on a narrow rim with close to or stock offset to keep them within the wheelwells.
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2004 4X4 Excursion XLT 6.0L Black, intake elbow, straight pipe, modified W and B code springs
1945 Ford GPW
1973 Jeep CJ5 350, NP435/TeraLow geared Dana 20 and lockers
1988 Dodge Ramcharger 360, NP435/241, D60s, 37s
1963 Dodge M43 Ambulance
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Old 04-30-2007, 07:33 PM   #3 (permalink)
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Re: Another Tire Question

I think the 315/75-16 are about the equivilent of a 33-34" tire, right? I was running 35-12.50-17 with a DR 4.5" lift and had a slight rub on the leafspring (trimmed the front plastic valance). My buddy is running 315/75-16 tires on his F-250 with a Fabtech 3.5 leveling kit and rubs the front leafs a little.

Hope that helps?
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Old 04-30-2007, 09:39 PM   #4 (permalink)
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Re: Another Tire Question

315/75-16s are approximately equivalent to a 35-12.5-16 and measure out at between 34-35" depending on the brand. How's the clearance at the rear of the front wheelwells on your Ex and your buddy's F-250?
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2004 4X4 Excursion XLT 6.0L Black, intake elbow, straight pipe, modified W and B code springs
1945 Ford GPW
1973 Jeep CJ5 350, NP435/TeraLow geared Dana 20 and lockers
1988 Dodge Ramcharger 360, NP435/241, D60s, 37s
1963 Dodge M43 Ambulance
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Old 04-30-2007, 11:09 PM   #5 (permalink)
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Re: Another Tire Question

315/75 always is aprox. 34-35" doesn't matter if its a 12" rim or a 20" rim. If you raised the front 4+" ya can run a 35"...might rub in sertin situations.

cary
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Old 04-30-2007, 11:28 PM   #6 (permalink)
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Re: Another Tire Question

[ QUOTE ]
315/75 always is aprox. 34-35" doesn't matter if its a 12" rim or a 20" rim.

[/ QUOTE ]

Actually, the tire sidewall height remains the same but the overall diameter of the tire changes with a change in rim diameter.

For example

315/75-16(315/25.4)*.75*2)+16= 34.6" tire diameter

315/75-18(315/25.4)*.75*2)+18= 36.6" tire diameter

Either way, I think I'll go conservative on this first new set and play it by ear for the following based on the fit I get.

Appreciate the replies since the only lifted Excursions in my area seem to be WAY higher and have quite a bit bigger tires than I'm looking for.

Ty
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2004 4X4 Excursion XLT 6.0L Black, intake elbow, straight pipe, modified W and B code springs
1945 Ford GPW
1973 Jeep CJ5 350, NP435/TeraLow geared Dana 20 and lockers
1988 Dodge Ramcharger 360, NP435/241, D60s, 37s
1963 Dodge M43 Ambulance
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Old 05-01-2007, 10:45 AM   #7 (permalink)
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Re: Another Tire Question

Oops,Reminder...don't post after a few beers [img]/ubbthreads/images/graemlins/grin.gif[/img] Dam metric system...think in inches and the posts metric!

Cary
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95 f250 4x4 xlt Excab Lb. white, BTS Trans, 4.10ls, Dana 60, ORU RS kit DR 4"front 5" reas springs!, Bilsteins, Centerline 18x9", 37" Toyo MT's,H2e, Tapercore IC,3" Billet intakes, Tymar 4" exhaust,intake and HX mod,Beans 2's, Stealth and Fuel system and DI studs, JS's IDM mod, TW 4 pos chip,TSM Rear Disks, 198k miles.

2004 EB 4x4 6.0 X born 05/18/04
white, LS,premier group, tow package, dvd. centerline 18x9" w/ 35" Toyo MT's, Edge 4.5" Lift, V's & custom B codes 37k miles 3rd turbo 6 5150 Specialy valved Bilsteins!

1976 EB Exploration daily driver
1971 EB Hard Core Crawler
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2005 Suzuki King Quad







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Old 05-01-2007, 03:22 PM   #8 (permalink)
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Re: Another Tire Question

I had a 2003 F250 SC Long bed that I put a Donahoe Racing 3 inch level lift on the front and used F350 blocks on the rear and ran a 315/70 R17 and had very minimal rubbing on the inside of the front leafs in reverse at full wheel lock. FWIW

Very minimal.
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Old 05-01-2007, 03:30 PM   #9 (permalink)
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Re: Another Tire Question

[ QUOTE ]
I had a 2003 F250 SC Long bed that I put a Donahoe Racing 3 inch level lift on the front and used F350 blocks on the rear and ran a 315/70 R17 and had very minimal rubbing on the inside of the front leafs in reverse at full wheel lock. FWIW

Very minimal.

[/ QUOTE ]

Thanks for your observations, this helps.
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2004 4X4 Excursion XLT 6.0L Black, intake elbow, straight pipe, modified W and B code springs
1945 Ford GPW
1973 Jeep CJ5 350, NP435/TeraLow geared Dana 20 and lockers
1988 Dodge Ramcharger 360, NP435/241, D60s, 37s
1963 Dodge M43 Ambulance
7.3L IDI project engine
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