Stock tire PSI for the Speed 3?

haha

I sold my stock tires with 12k on them. They still had 6/32nds at the lower point. I could have easily gotten 25k out of them. I rotate every 5k during my oil change. My 235/40s look new after another 12k. Chewed to s*** from the inside of my rear fenders.....but the tread is great!

ha Did you roll them or wait for the tires to conform to the fender? ha
 
It seems most all high speed summer tires are directional, if you do your own tire rotations and the arrow on the sidewall is not apparent just look at the tread pattern it is easy to see. And silver ectasy i belieive you are on track about pressures. Just look at the front rear weight bias, very heavy front. I am amazed it doesn't understeer much more.
 
Our stock tires are **NOT** directional. You can put what ever rim/tire on what ever side you want. The mounting of the tire is what needs to be done right. There is an *inside* and *outside* marking on the tire but the tread pattern is not directional. Go look. The stock tire PSI from ALL car manufacturers is for good handling and comfort. Not for getting the most out of them wear wise and highway cruising. I have run the MAX PSI on my tires for 16 years and have never once wore out the center of any tire ever. I put over 60,000 miles on a set of tires that were on my 96 VW GTI. I ran them at 41psi front and 39psi rear. Tires had a max pressure of 44psi. They wore perfectly. On my Lightning I had over 30,000 miles on my stock tires before I took them off because I changed rims. They even wore perfect up front. Out back well…………..truck had a little over 500ft/lb torque so the tires were punished.
Running close to the max PSI on the tire is not going to wear the center of the tire. I have proven that to myself over years of doing it. Actually you get more miles out of a tire this way. Over inflating the tire past the max PSI will make it wear the center. Running more PSI will kill handling and give you a very HARD ride. But, you have much less rolling resistance on the freeway.
But, these tires become rocks at 45PSI and up so. As of now I have 39PSI front and 36PSI rear and it feals good all around. This is were I will stay.
 
I just can't fathom the max psi as safe.

If the tire's maximum pressure is 44 psi and you're running 40 psi, you're running real close to the limits of the actual tire. Atleast here in MI, one pothole and you'd wish you never had it at full psi. The most I think i'd run mine on the MS3 is 38 psi.
 
I just can't fathom the max psi as safe.

If the tire's maximum pressure is 44 psi and you're running 40 psi, you're running real close to the limits of the actual tire. Atleast here in MI, one pothole and you'd wish you never had it at full psi. The most I think i'd run mine on the MS3 is 38 psi.


I agree ...


"max psi" is a precaution and not a suggestion.
 
Exactly. That's why I think Mazda is so smart. They know that most people buying the MS3 are going to redline the engine consistently being it's a turbo'd 4cyl. So to prevent damage, they restrict power 500 rpms before redline begins.

Somewhat similar analogy.

Either way though, yeah I've ruined a set of Yokohama AVS-E100 because they weren't properly inflated for atleast 8,000 miles. I was young and didn't know any better, and they came out wavy as hell. I learned my lesson and check my tire pressure constantly.
 
Rule of thumb on the motorcycle racetrack was to set a cold pressure which than showed an increase of 10% when hot...for ex., 36 cold...39.6 when hot. If hot psi is too low, make the tire softer cold and viceversa.
 
Andrade youre being a dumbass. Why the hell did you start this thread if you aren't going to listen? You seem very ignorant. You get a performance car and try to get longetivity out of the tires? Something doesn't make sense to me here. CHEERS!
 
Read every post and still have no idea what the best PSI should be....You guys Fail!!!! :)

Dude Its on the door. If when you open the door and look directly aww f IT is 34 32 and you can vary that a couple pounds for personal preference. More pressure =a bit stiffer ride. Less pressure= softer over bumps, but more sidewall flex when turning imo. peace
 
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