Bigger tires?
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More Turbo
Joined: Sep 2003
Posts: 745
Likes: 34
Bigger tires?
Who thinks 315/75/16=35" tires are too much for a 03 f-250 v-10 with 3.73 gears? Will the power loss be noticeable or will fuel be that much worse, I just did a leveling kit 3" edge and put 295/75/16=33.4 on and I'm starting to think I should have gone with the bigger size. All feed back is welcome, thanksin advance 
Junior User
Joined: Jul 2003
Posts: 61
Likes: 0
From: Farmington, NM
I recently bought an '04 F-250 V10, and the dealer I got it from had put 315s on it. The front tires rubbed on the leaf springs when the wheel was turned almost to the locks. My truck has stock wheels on it, so there is no offset on them. The tires would have cleared if the wheels had some offset out. I did not want to buy new wheels, so I put 285s on it instead. It drives better with the 285s, and it still looks good also. My truck also has 3:73s, and there is a noticable difference in power and responsivenes. There is a picture of my truck with the 285s on it in my gallery.
Gary
Gary
Originally Posted by cc322
Who thinks 315/75/16=35" tires are too much for a 03 f-250 v-10 with 3.73 gears? Will the power loss be noticeable or will fuel be that much worse, I just did a leveling kit 3" edge and put 295/75/16=33.4 on and I'm starting to think I should have gone with the bigger size. All feed back is welcome, thanksin advance
Junior User
Joined: Oct 2004
Posts: 86
Likes: 1
From: Oakboro, NC
I checked the tire size/gear ratio chart on interco tire website. Technically 35" with 3.73 is outside of the recommended range.
However, I drove a '92 F150 with 351 and 3.55 gears on 35" tires for about 40,000 miles. It wasn't my choice of setup. My brother did it when it was his truck and I just never saved up to change the gears. You loose bottom end torque, but the top end HP is still there. With an auto tranny it would still bark the tires and launch when the throttle was mashed hard from a stop. I wouldn't want to pull much of a trailer. In town it would burn the gas. On the interstate it was great, puttering around at 1700 RPM and 70 MPH.
Depending on how you use the truck it would be OK but not ideal.
However, I drove a '92 F150 with 351 and 3.55 gears on 35" tires for about 40,000 miles. It wasn't my choice of setup. My brother did it when it was his truck and I just never saved up to change the gears. You loose bottom end torque, but the top end HP is still there. With an auto tranny it would still bark the tires and launch when the throttle was mashed hard from a stop. I wouldn't want to pull much of a trailer. In town it would burn the gas. On the interstate it was great, puttering around at 1700 RPM and 70 MPH.
Depending on how you use the truck it would be OK but not ideal.
Senior User
Joined: Jan 2005
Posts: 145
Likes: 0
From: florida
i have bfg at 35-12.5-16.5 on my 2000 250 with a 6" lift and 3.73's. The truck has about 190k on it and I put the lift and tires on at about 170k. MPG only dropped about 1-2mpg. I plan on putting some 4.10 or 4.30 on though, it needs it for heavy towing. 2000 rpm is about 76-77mph. Running on the hwy about 70 i feel the rpms are too low, it downshifts on the hills. If i run 85 where the rpms are better, itll climb up without shifting.
What im trying to say is as long as your not towing a real large load, it should be fine. My truck will still tow my 27' baja (about 6500lbs) at 75 mph with no problems.
What im trying to say is as long as your not towing a real large load, it should be fine. My truck will still tow my 27' baja (about 6500lbs) at 75 mph with no problems.
