I have Nankang NSIIs 215/35/18s I wanna check the pressure on them make sure its all good does anyone know what the level should be?

 

it should say the max PSI on the side wall. i recommend putting somewhere NEAR that, but not over for normal driving. remember, if you measure your tires cold (meaning you havent driven on them to get them up to normal operating temp), then your PSI will be lower. make sure to get a reading when your tires are warm, then put in air accordingly..

 

THeres no psi on the tire itself, i spent like 30 mintues looking for it its not there bro.

 

Could be anywhere between 35-45PSI, but that's a pretty broad range. LOL. I would try looking up something on the internet about the tires. You have to find the information somewhere.

 

ok..well with a low profile tire like the one you have, im guessing the max PSI is somewhere like 51 psi..but thats just a guess..u sure u cant find it? sometimes it's easy to miss. try looking on the sidewall again tomorrow cause i thought max PSI was a required info that needs to be on the sidewall..

EDIT: o btw, i think the max PSI written on the sidewall is actually cold tire pressure..

 

Well what i do know is that when i measured the tires they were at 30 lbs on my little measure thingy so where should the right ammount be? I think 51 would blow up my tires.

 

with lower profile tires, u need a higher tire pressure usually..i think 30 is really low for those tires. i would go AT LEAST 35, maybe even 40.

 

I have the same tires and I couldn't find the psi either.I remember a thread about tire pressure not to long ago and the consensus I think was that all tires should basically be between 30 and 35.I could definity be wrong on this.I have mine at 34 on each tire. I hope that is enough...

 

I've seen on Speedvision TV where they say to put it half way between the max PSI in your door and max PSI on the tire. I keep mine around 35 to 40 PSI max. They are Hankook Ventus HRII 205/40/R17's.
I get nice even tread wear and a firm ride. I think it depends on the tire and personal preference. Test it out by going around sharp curves and see when your wheel starts to skid at different speeds. Thats how I gauge my tire pressure. If it starts to roll over, it needs more air. If it starts to skid really easy, then it needs less air.

 

^yes that's actually a good way of doing it. when i autocross, i chalk up the tires, meaning i put a couple lines of chalk that goes from the tread to the sidewall. after i take the run, i check out how much of the line has disappeared. if the line on the sidewall has disappeared, then i need more air. if it hasnt, it's good. hope you understand what i mean..it's kind of hard to explain right after i woke up

 

I'm also surprised they don't list a max PSI on your tires, but for daily driving you really want whatever will wear evenly. But as said above, considering your low profile I would go with about 40-45 cold. Keep it at the same pressure checking twice a week for about 10-15k miles, then check the wear. If the sides of the tires are wearing more than the middles, you need more pressure. If the middles are wearing more, you need less pressure. Take it from me, a person who got 45k miles on those crappy stock Yokos!!!

 

I'd keep it at 40 myself to start just to lessen the chance of a blowout. But Brian knows a hell of a lot more than me in this department, so if he says I'm wrong...I'm wrong.

 

You're wrrrrrriight! On low profile tires such as that, 40 would be a minimum because it will keep you from pinching the tire, which will then tansfer the impact to the rim and bend it.

 

Are u guys sure i can put 40 pounds of air in my Nankang NSIIs 215/35/18s?

 

I dunno man, here in michigan we grow our potholes big and deep. I've seen lots of people putting 40-50lbs of air in their low pro's and getting blowouts when hitting a pothole. Thats why I keep mine at 35-40 max, plus it handles better. I have to take some pix of the potholes here. Some of you guys would not believe it. lol. I just drove by one today that was 7in deep, 8in wide, and over 10 feet long. It looks like a fault line, rofl. I'll go one of these days and just take pictures of some of the roads around me.