Hello all,

I am currently rolling on 19" tires (Falken FK452 in 245/35R19 all around) on 19x8.5" rims (MRR GT1 chrome). When I got them installed at the tire shop, I asked the proprietor if I should use a higher pressure than the recommended pressure for my OEM 17" tires (33 psi). He said to just go with that.

From what I gather, lots of people use higher psi for larger tires. I assume this is to help protect against bends in the rim since there is less sidewall to protect it.

I guess my question is: Is it necessary or recommended to run higher than 33 psi on my 19" tires? If so, what would be an optimal air pressure? There must be a point of diminishing returns. What point would that be? Are there any disadvantages of running too high a tire pressure (aside from a harsher ride)? I've heard anecdotal evidence that MRR makes decent rims, but I know nothing about that kind of stuff. I just don't want to bend my rims. (I do a lot of driving --approximately 2500 km or 1500 miles a month and the roads here aren't in the greatest of shape sometimes.)

Any input would be greatly appreciated. Thanks!

 

If you dont want to bend your rims then the recommended pressure is 40psi.

 

Whoah - hold on there sport! It depends on the tire as well.. but my Fsport Lexus wheels recommend 39 rear, 35 front.....

YMMV

 

Hmmm, wonder why they recommend different tire pressures from front and back. Oh wait, you must have the staggered setup and you're RWD, right?

So basically other than a potentially harsher ride, there is no real disadvantage to running at a higher pressure (within reason, e.g. 35-40 psi)?