Tires
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Tires
Ok so i have been searching around and found tire posts but cannot find the specific question i am looking for. I have a stock 06 F350 FX4 crew Cab. right now it has 275-70-18's on it. there appears to be alot of dead space in which a tire can fill. What is the Biggest tire i can go with on the stock rim and stock suspension? i am leaning towards the BFG All Terrain TA/KO's as ihave had them before on my Baja and loved them. i just dont want to go with the 275-70-18's.
Fleet Mechanic
Joined: Nov 2003
Posts: 1,372
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From: West Cornwall, CT
You can go with taller tires, but the stock size actually works very well for the type of use we give our trucks. These tires are actually pretty darned big!
Towing, plowing or other HD use - stock size tires. If you don't load your truck heavily, 305 to 315-70-18's will fit on the stock rims.
Lou Braun
Towing, plowing or other HD use - stock size tires. If you don't load your truck heavily, 305 to 315-70-18's will fit on the stock rims.
Lou Braun
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i seen one guy on here "dont remember who" but he had 305-65-18's and said they cleared just fine.. i dont load the truck up at all really but i do Tow my Rx7 around... should i be able to pull off a 305-65-18 without rubbing in turns and off road?
Token Redneck
Joined: Jun 2007
Posts: 9,339
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From: Breckenridge, TX
I have 295/70R18s. Just a hair under 35", fits with no lift.
Saying 305-315mm wide tires will fit on stock rims is a stretch; from a rubbing perspective the tires might work on the truck, but the section width of a 305mm tire is right around 12 inches. On an 8" wide rim that is past most manufacturers spec for mounting. Off the top of my head, I know that 305/60R18 Nitto Terra Grapplers spec out at 8.5-(9)-11.5, with 8.5" rim being the narrowest, 9 recommended, and up to 11.5 possible.
At 295mm on 8" rims, I have to air down from 80 to under 50 to get the backs truly flat, and that's with a 100# toolbox cramed with stuff (including a couple of heavy floor jacks, and a headache rack made from 3/8-1/4" thick tubing that I swear weights 250# by itself. Front runs around 70psi to get them flat, even with the diesel and a front end replacement bumper. Usually I bump the front to 80 because the steering turns to mush anywhere under that, but that's probably more from the tires being real M/Ts with longer solid lugs compared to A/Ts that have about 2/3 of the tread depth when they're new.
Saying 305-315mm wide tires will fit on stock rims is a stretch; from a rubbing perspective the tires might work on the truck, but the section width of a 305mm tire is right around 12 inches. On an 8" wide rim that is past most manufacturers spec for mounting. Off the top of my head, I know that 305/60R18 Nitto Terra Grapplers spec out at 8.5-(9)-11.5, with 8.5" rim being the narrowest, 9 recommended, and up to 11.5 possible.
At 295mm on 8" rims, I have to air down from 80 to under 50 to get the backs truly flat, and that's with a 100# toolbox cramed with stuff (including a couple of heavy floor jacks, and a headache rack made from 3/8-1/4" thick tubing that I swear weights 250# by itself. Front runs around 70psi to get them flat, even with the diesel and a front end replacement bumper. Usually I bump the front to 80 because the steering turns to mush anywhere under that, but that's probably more from the tires being real M/Ts with longer solid lugs compared to A/Ts that have about 2/3 of the tread depth when they're new.
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