picking up a 1988 f150 4x4 ext and it needs tires.

any suggestions how large i can go without messing anything up? im used to abs/computers getting off with the newer vehicals. I dont want to go huge but would like a 285/75. stock is 235/75/15

 

first there are about a million tire size treads.....

second prolly the most popular swap is 31/10.50's if you have an auto e4od the trans shifts kinda funny afterwards, manual it is fine, as far as gears go i run 31's with 3.55's and it goes pretty good on highway. prolly would be better with 3.73's but i got what i got. and they rub the radius arms

you can also fit 33's pretty easy but it will be even harder on the trans, plus they rub pretty bad on the radius arm

 

I am running the 31x10.50x15's on stock rims on my 96 4x4 and they don't rub the radius arms. I think 265's are basically the same size as the 31's.

 

count yourself as one of the few lucky ones that, or your stops have been adjusted

 

With the factory rims I don't rub with 31's. With some aftermarket I do rub, with spare significantly.

 

E4OD and 31x10.50s with 3.08 gears, my trans is exactly the same as before.

Still goes like it did when stock too! I'd suggest 31s for a size up and no lift

 

I have 33 12.5 bfg TA KO's on my stock 89. I rub the fender a little on real sharp turns. But I ordered a leveling kit for 100 bucks that will fix that. I had gotten 31 10.5 first and they were a bit small for me. Tires Plus took them back after 10 miles and let me upgrade. Just paid the price diffrence

 

I have 33x12.50s and they don't rub AT ALL.