I was just wondering if anyone knew what the biggest size tire i could put on my truck without tire rub. I have a 1999 Ram 1500. I have not done any suspension work or body lift.

 

More important than suspension or body lift when selecting tires is GEARING!!!!!!!!! What ratio are the gears in your truck?

 

Most likely 285/75R16s. Which is close to 33"

 

that cant be right. that would mean im running 33's. im running a 99 with 285s and all i needed to do was adjust my steering bolts to compensate for the extra couple inches of tread. lose a touch of steering radius, but she still turns pretty sharp as it is.


if you had added spacers or something, im guessing you could go up to 305's.


*edit

wait.. you're looking for height, not width. nvm me.

 

My buddy's 01 runs 285's with no lift and no rub. Figuring that they fit on his truck I bought 285's for my 98. Mine rubbed. Has boggled me why since then, what's the difference between the 2 trucks? I have since put a 2" coil spacer and they still rub on the lower control arm.

 

I run 285/75/16 Pro comp Xterrains on my 97, no suspension mods (yet). I have no tire issue whatsoever. If you bought your truck used there may have been a mod, or maybe when I bought my truck used there was already a mod in there. Also it could make a difference if you are running stock or aftermarket rims. Aftermarkets may not have come with the correct off set. If you go to the pro comp tires site they have a tire size calculator on the site for calculating the size of standard tires. A 285/75/16 comes out a 32.8 inches, so basically a 33.

 

i have 285s, stock setup, and im not even close to rubbing

 

i was told by a tire guy that with a stock set up 265's will NOT rub. a 285 might not rub but that's really going to depend on the rims you have with what offset / spacers(NEVER DO ON A 4X4 OR ANY VEHICLE, but please do on civics...)

like already said if you adjust the stop bolts you shouldn't rub with a 285. the difference between a 265/75 and a 285/75 is really only about an inch in height... it's more about the contact patch that makes the difference.

[edit] if you havn't messed with the gears, no lift, and stock tires, i'd say you're running a 3.55 gear set up from the factory. which is probably only good enough for a 285 and no bigger. [/edit]

 

Im running 305's 50 20 and havent had them rub yet one day i tried my friends 22 was rubbing the hell out of it around the block. I dont think i got any upgraded suspension if i do bought it like that.

 

Here's a stupid question ...

I went from a 16" stock rim with 245's to a 17" rim with 265's. My truck seems bit slower out of the gate and seems to really wind out at 70 mph now. Is it the increase in rim size, or the increase in tire size that made the difference? Would a 265 be just as tall on a 16" rim as it would be ona 17" rim?