Tire size question - Ford Powerstroke Diesel Forum
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post #1 of 21 Old 02-11-2007, 11:08 AM Thread Starter
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Tire size question

I have an 03 PSD. Totally stock except for gauges. Exhaust and an itake coming soon but first I need new tires. I am leaning towards BFG all terrains. My question is what is the tallest tire that I can put on stock rims without any rubbing or a lift kit 285, 295 or 305. Right now I am running the stock Firestone Steeltexs 265/75R/16E. Is the 295 or 305 equivalent to a 33x12.50. How much fuel mileage would be lost. I mostly do around town driving and during the winter I tow 2 sleds upstate and a 21' boat in the summer. Hopefully this isnt a stupid question. Thanks.
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post #2 of 21 Old 02-11-2007, 11:16 AM
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I've heard several people say they can get the 305s under stock height trucks, I'm sure some of them will be along to confirm this -- or not hahaha,

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post #3 of 21 Old 02-11-2007, 11:19 AM
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ive heard a bunch of ppl say alot of differnt sizes you can stuff, but i think to be safe go with the 285's i dont believe youll have any rubbing issues, and the minuete tire increase wont effect much

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post #4 of 21 Old 02-11-2007, 11:20 AM
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Quote:
Originally Posted by psd76 View Post
I have an 03 PSD. Totally stock except for gauges. Exhaust and an itake coming soon but first I need new tires. I am leaning towards BFG all terrains. My question is what is the tallest tire that I can put on stock rims without any rubbing or a lift kit 285, 295 or 305. Right now I am running the stock Firestone Steeltexs 265/75R/16E. Is the 295 or 305 equivalent to a 33x12.50. How much fuel mileage would be lost. I mostly do around town driving and during the winter I tow 2 sleds upstate and a 21' boat in the summer. Hopefully this isnt a stupid question. Thanks.
285x75R16 is equilivent to 33x11.50R16, 305x75R16 is equilivent to 33x12.50R16 the 295x75R16 is a half size it is in between the 33x11.50R16 and 33x12.50R16.


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post #5 of 21 Old 02-11-2007, 11:21 AM
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Quote:
Originally Posted by stump0331 View Post
ive heard a bunch of ppl say alot of differnt sizes you can stuff, but i think to be safe go with the 285's i dont believe youll have any rubbing issues, and the minuete tire increase wont effect much

You are correct stump 285x75R16 will not rub at all. I have been running them on my truck since the second day I owned my truck. I didn't even wait to wear out the firestones that were on my truck.


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post #6 of 21 Old 02-11-2007, 11:36 AM
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I just changed to 285's from 265's and they fit just fine and yes you will lose some mileage as you go to the bigger tire. This will also change your odometer and mph gauge unless you can have it setup for your tire size.

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post #7 of 21 Old 02-11-2007, 11:53 AM
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this is an awesome clculator that will give you the diffrence from changing tire sizes

Wheel and Tire calculator

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post #8 of 21 Old 02-11-2007, 11:57 AM
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Is a 285/75 16 the same overall size as a 285/75 20? Or does the wheel make the overall OD larger?

Eric
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post #9 of 21 Old 02-11-2007, 12:09 PM
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i dont belive it does just makes the side wall smaller

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post #10 of 21 Old 02-11-2007, 12:11 PM
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Quote:
Originally Posted by stump0331 View Post
i dont belive it does just makes the side wall smaller
I was wondering about that...my 20s side does seem a little smaller for a 265/75 stock tire...Thanx Stump!!!

Eric
2007 F250 6.0l King Ranch CC LB
Sponsored by Innovative Diesel Performance
SCT XCal2 w/ Custom Files & FICM tuning
DashDAQ Series II; ARP Headstuds; AFE Stage 2 XP Intake w/ Proguard 7
Industrial Injection 190cc injectors; FASS 150/180; ITP Regulated Return
'03 Turbo Swap; Zex N2O Dry Shot; CFM Smallmouth Intake Elbow
Zoodad w/ Predator Screen; MBRP 4" Cool Duals Straight Piped
EGR Delete w/ full manifold; Coolant Bypass Filter; Train Horns
Eclipse AVN62D; High Idle Mod; BFG ATs 285-65/20s

Truck- 12.51sec @ 108mph @ ~7700lbs (1/4 mi)
Cooler- 39.93sec @ 12.12mph @ ~180lbs (1/8 mi)

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