rallyman

You're not reading that wrong but that is the maximum cold inflation pressure. The heading for 'maximum inflation pressure' in that table is a clickable link and gives a good explanation.

supercow

this is from that scc link as well.


Those tires are designed to be used on all sorts of conditions and thats the absolute MAX the tire should ever see. the rating you should consider first is the manufacturers rating. It's set to include things like vehicle type, weight, etc. Heavy duty trucks see extremely high pressures like 60-70 psi. their tires are rated up around 100psi. Doesn't mean they run them there.

FlyRyde

I'm still pretty sure this has nothing to do with my tires or wheels at all. Something is screwy, and it feels like something is allowing my drivers side front tire to literally pull out to the left while I'm driving??? But everything is bolted up tight? I have no clue whats up, but I still haven't swapped wheels, so we'll see. And I dont think I've ever driven with the tires at their max, since my suspension is bone jaring anyway.

DTN

A manufacturer recommends a tire inflation pressure which is high enough that it will allow you to go over a speed bump without damaging the stock wheels. The tire pressure is low enough that it does not provide a bumpy ride. The manufacturer does not recommend the use of oversized wheels. 16" is the maximum. If you look on the driver's side door sill of your car, Hyundai provided ratings for 14" wheels with different tires and 15" wheels as well. They do not provide sizes for 16" wheels or 17" wheels because they do not recommend the use of larger wheels because it will decrease comfort and increase the risk of damage to the rim.

Your rims move inside your tire alot more then you think they do, especially over a pothole or a speed bump. A 15" rim has 4" of tread between the im and the edge of the tire. A 17" rim has less then that. They are both under the same ammount of pressure when the vehicle is standing still, but when you hit a bump in the road, the 15" tire has ALOT more cushion between the edge of the tire and the rim. If you want to save your oversized rims, you have to compensate the lack of space with excess pressure to ensure it does not crash onto the concrete.

I can tell you first hand that a 17" rim at 32PSI will destroy the rim under normal driving conditions slowing down for speedbumps and hitting the occasional unexpected pothole.

majik

Chris, if it's not the wheels, tires, bearing, or one of those being loose, the only thing I can think of is your axles are messed up, but that wouldn't require speeds in excess of 65 for you to feel it.

Change your wheels, then drive. Adjust your suspension, then drive. Then report back

AGreen

I second the shock theory. From what I read, you didn't lose air pressure right away after hearing the psssh? And the car rides like shit, so you're probably rolling on a blown out shock. Unfortunately, since you have coilovers, the bounce test may not work, but you can still give it a try. Just bounce like hell on each corner, then let off. If the car doesn't stop bouncing immediately, you've got a blown shock. You even said you have some shitty brand coilover.

BTW, did you shake down your front end? Check for loose parts like tie rods, wheel bearings, or ball joints. It *may* be one of those, so do that before replacing the struts.

FlyRyde

I'll swap my front wheels tomorrow and see how that goes. Then I'll try some other stuff. I just now read about the neon with the same prob. Tires aren't very new anyway, so if it IS them, at least its an easy fix smile.gif

Tires swapped, prob still the same, only my car is now half an inch lower, which brings it like 50% closer to the ground, lol. I need to swap my passenger coilover and see whats up. Then go from there. But first I need to undo what took me a friggin hour to do this morning and get my regular wheels on.

SO all your tire theory dudes, any ideas now that we KNOW its not tires. Thanks all.

Ericy321

DTN, the whole speed bump thing makes no sense. Ya at that psi if you rammed a speed bump it wouldnt hurt the rim. But who does that anyway? 40psi is really high either way. 35 is more like it. Losing a little accuracy on the speedo is a price you pay with bigger wheels.

Cypher

I run my 225/50/15s at 38psi all around because they grip better that way.

As for your issue, take your car to a shop that has a hunter road force balancer. Its possible that a belt may have shifted inside the tire and, while a normal balance won't detect it, a road force balancer can correctly pick up on it and tell you if thats where your pull is coming from.

crap, just saw that you swapped wheels and it persisted. Another thing that I could recommend is taking it to a shop and sticking it on the alignment rack. Looking at the different measurements on the screen may help narrow down the possibilites. If you pull your coils off, you're going ot need an alignment anyway so I guess you could swap them first to see if it gets better.

netsniper

Sounds like a broken belt in one of your tires..