General QuestionsGeneral questions related to 1999-2007 Super Duty trucks. If it doesn't fit the other categories, post it here. Gas engine discussion that pertains to all models is allowed. Specific gas engine questions should use the Gas Engines forum.
All '99-up SuperDuty factory tires have been load range E.
Size depends on the year, and whether your F-350 has single rear wheels (SRW) or dual rear wheels (DRW).
For your '03 F-350 SRW, stock size was LT265/75R16, load range E.
If your '03 F-350 is a Dooley, then stock size (and the biggest size that will properly fit the Dooley wheel) was LT235/85R16, load range E.
Brands vary. For '03 I think the most common brand was Firestone. But Ford also mounted some Goodyear and some BFGoodrich and some General. My '99.5 came with Generals. For '05-up, the most common brand is Continental.
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My Sierra Blanca is a '99.5 PSD CrewCab hot-rod Towing Machine! BTS tranny; TurboRamAir intake and 4" stainless turbo-back exhaust; DP-Tuner tunes flashed into an Edge Evolution tuner; ISSPRO EV gauges and TTM; AIC; SP-Diesel exhaust brake and torque converter controller. I special-ordered it new and plan to drive it until it quits.
Smokey is correct except he left out the Pirelli Scorpions that my '03 and a lot of others came with. I also saw some with Michelins, which may, or may not have been special ordered.
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2003 KR F-250 4X4 CC SWB, 6.0, 5 Speed Auto, 3.73 Axle, no Limited slip. Rhino bedliner, Unicover bed cover.
Built on February 19, '03
#2 93 F-150 XLT, 5 Liter, Auto, 4X4, X Cab. 231,000 miles. Uses no oil between changes.
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So what weight will a load range E tire take compared to a D?
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Depends on the tire size.
For LT265/75R16,
load range D = 3,042 pounds @ 65 PSI
load range E = 3,415 pounds @ 80 PSI
A load range D tire could have up to 6,084 pounds on the rear axle without overloading the tires. If you loaded the pickup to 6,084 on the rear axle, you'd probably have about 5,000 pounds on the front axle. So your GVW would be over 11,000 pounds. Since your GVWR is only 9,900 pounds, then load range D tires in size LT265/75R16 is all you need if you don't severely overload the pickup over the GVWR of the pickup.
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