tire sizes - Ford Powerstroke Diesel Forum
 
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post #1 of 8 Old 08-08-2011, 07:45 AM Thread Starter
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tire sizes

truck is in shop getting repairs. shopping tires to be put on. tire dealer is arguing that 37-12.50-20 will not fit on a leveled 350 truck. dealer says no too. i know they will fit but all around here say no.
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post #2 of 8 Old 08-08-2011, 08:02 AM
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No. They are correct. I am one of the few running 37's on a 4" Lift. I had to trim about 2" off of the front bumper and pull the fenderwell liner back about 4". I would not even try it with only a leveling kit. I'm sorry, I know that is not what you want to hear.

2005 Stampede Edition F-250 SuperDuty 6.SLO Diesel
4" Lift on 37" Toyo MTs ( IT CAN BE DONE ! )

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post #3 of 8 Old 08-08-2011, 08:41 AM
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One of my buddies has a 2.5 leveling kit on his and is running 37 mud grapplers.rubs alittle but does fit.

09 F-250 King Ranch
H&S Mini Maxx/ HD Tune/ 5" Flo~Pro/ AFE PDS Intake
Leveling Kit with 37x12.50 R20 Nitto Trail Grapplers
CCV Mod
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post #4 of 8 Old 08-08-2011, 11:28 AM
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Originally Posted by Special View Post
No. They are correct. I am one of the few running 37's on a 4" Lift. I had to trim about 2" off of the front bumper and pull the fenderwell liner back about 4". I would not even try it with only a leveling kit. I'm sorry, I know that is not what you want to hear.
FYI the 6.4 sits higher and has different fender wells than the 6.0.....i run 35x12.50 20's on a stock setup no issues....im told the 37's will fit with a 2.5 level lift on a f350


on my 6.0 i had a level lift and 35's hit front and back....needed a football field to turn around...


08 F350 MINI MAXX,5"FLO-PRO DPF DELETE, AFE INTAKE,HID'S,BFG A/T'S ON 20" BMF NOVAKANES,TIMBREMS,BLACKED OUT BUMPERS GRILL,STEPS RACING STRIPES,PAINTED HEADLIGHTS ,FABTECH LEVELD,RCX DUAL STABILISERS
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post #5 of 8 Old 08-08-2011, 11:29 AM
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37's will fit with the stock wheels and a leveling kit. It's all in the right offset wheel.


2005 Ford Excursion 4x4 Limited(Current)
2006 F350 Crew Cab 6.0 Lifted 6",22's,SRL, Edge CTS(Totaled)
2003 F250 Crew Cab 6.0 Sonic Blue Sport 38s/20s(SOLD)
2001 F250 Crew Cab 7.3 w/ 08 Clip 37s/22x14s(SOLD)
2005 Excursion Limited 6.0 I.D. Tunes 38s/20s(SOLD)
2008 F350 Crew Cab 6.4 Job II 2.5" Leveling kit(SOLD)
2001 F250 Single Cab Short Bed Looney Tuned 6.0 Conversion Studded/EGR Delete(SOLD)


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post #6 of 8 Old 08-08-2011, 01:00 PM
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I'm sorry. I did not catch that it was an 08+.

2005 Stampede Edition F-250 SuperDuty 6.SLO Diesel
4" Lift on 37" Toyo MTs ( IT CAN BE DONE ! )

Barder Stage 2 Turbo-Warren 175/30 Injectors-WPE Stage 3 Intake-DD RR-CTS2 Monitor-ARP Studs-BPD Remote Oil Cooler-Amsoil Custom 2 micron Full Flow Oil Filters-Sinister(Coolant Filter & CAC Pipes)-CCV Mod-Special's Fenderwell Mod-4:30 Gears-Grizzly Locker-Custom 5" Dual Straight Pipe Exhaust-AFE Momentum Intake-SCT Custom Tuned-Kleinn(630 Train Horns & Onboard Air)-HIDs-JL Audio-and Zoodad.
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post #7 of 8 Old 08-09-2011, 02:23 AM Thread Starter
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thanks for the replies. i am still a tad concerned that the 37" may be snug. i tow and dont want to have to worry about the squatting.......
stock 275-65-20 = section width 10.82 37x12.50x20= 12.5
overall diameter 34.07 36.8
sidewall height 7.03 8.50
radius 17.03 18.50
circumfrence 107.0 116.2


should i try it or shrink down to a 35"? i think the truck had PLENTY of room with the stock 275 and had good room when i moved up to the well worn 285 or 295's(cant remember what they were) i think there will be room for the new 3" but all on my end are telling me no..... thanks.
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post #8 of 8 Old 08-09-2011, 05:36 AM
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The tires will fit with stock wheels. But thats not what I would worry about. Your truck has 3.55 or 3.73 axle ratio......? Either way, both of those are inadequate for towing, let alone towing with 37" tires. I chose not to go above 33's for that exact reason.



2010 CCSB FX4. Mini Maxx/Gearhead, Deletes, H11 Studs, Up-pipes, 4" DP, 5" Back, CAC, Elbow, CCV, CAI, Custom Heads, Elite Transmission


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