K_Squared

Hey guys fairly new owner of a 2007 TL-S. The car came with Hankook Ventus V12 evo K110's all around. The dealer I bought from pumped these to 32 psi all around according to the maintenance check they did before giving me car. I heard that these tires are really soft so people recommend pumping them to a higher psi (~36, even up to 38). Factory specs are at 32 psi. The thing is the winter season is here and I keep getting a warning light from the TPMS in the mornings saying my tire pressures are low (~28) esp on the driver side.

Should I pump these to 36 all around or leave them at 32? Should I be getting a lower tire pressure on the driver side? Also I'm hearing that the front should be pumped ~2 psi higher than the rears for a better ride. Thoughts anyone?

Undying Dreams

iTrader: (3)

Last night I brought my fronts to 35, rears to about 32.

K_Squared

I would like to add that I think my mpg is suffering due to the tires being at 32 psi. The driver side is always lower according to the monitor. I would like to know the optimum tire pressure for best mpg and ride quality for these tires if anyone knows based on experience.

Undying Dreams

iTrader: (3)

My MPG has suffered with these tires alone. They are high performance summer tires, which in return are a low treadware, meaning they are sticky. I had some other tires (sucked) when I bought it, I was making 24 easily, now I get 21-22 MPG.

Don't get me wrong, I love these tires, very quiet, grip well, great in the rain, ect.

K_Squared

I'm getting about the same MPG as you. I really don't have anything to compare to though since these are the first set of tires I'm driving with.

Undying Dreams

iTrader: (3)

In all honesty, it was only ~2 MPG so I'm not all that worried about it.

I came from BFGoodrich tires which make my TL sound like a lifted truck. They were so loud, it drowned out my radio so I view these as a fair trade lol.

If I were you I'd keep the tires at no less than 32 psi. If you see signs of wear in say...the middle, they're over-inflated, if you see wear on the outside edges, they're under-inflated.

Will Y.

First, street tire pressures should be set when the tires are COLD, so make sure put in at least 32 psi in the morning before the car has been driven. This will stop the TPMS alerts, too.

Second, I would increase the tire pressure above recommended if it helps with steering feel, response, etc. as long as the pressures are below 40 psi and there are no wear issues (make sure to rotate, and align as necessary).
My TL tires (currently RE970 Pole Positions) have almost always been set to 37-38F/34-35R for street purposes.

BTW, the differential in the front and rear tires is for tuning the balance of the car, i.e. minimizing understeer. Acura uses different front and rear pressures with the manual trans cars, but not the auto trans cars.

Welcome to AZ.

pohljm

I run 35 all around on mine

K_Squared

Thanks. Yeah mines an auto trans. So I guess this front and rear differential doesn't apply.

Acura-OC

Page 345 of Car manual for 2008 TL

Front 33 psi
Rear 32 psi

Type S
Front 35 psi
Rear 32 psi

Higher psi is mostly to make sure tire will not collapse during sharp turns at high speed.

36 psi vs. 32 psi will have ZERO effect on MPG but it sure will make you feel like you are driving rattling carriage and not a luxury car.

4drviper

they have soft sidewall. when i had them on 380hp tiburon i had them 40/37 cold for better ride,,,,,,, 50/40 hot for street racing b/w 100-150mph

gatrhumpy

iTrader: (1)

Why does this look like this thread?

https://acurazine.com/forums/3g-tl-tires-wheels-suspension-97/michelin-pilot-sport-ps2-recommended-psi-873768/

Will Y.

'Cause you've got really bad eyes and didn't notice the different tire type mentioned in the title?

Sutitan

I used to run 36 all around.

I loved these tires, but I went through them too quickly. I drive pretty spiritedly, and I believe they lasted me about 12k-15k miles (with an autocross or two on a couple of sets). They went a little over a year in between changes. Mileage wasnt really affected. I got 32hwy with them. I still get 32 hwy with Hankook Ventus V4's, which are all seasons. I really do miss my old tires, but I couldn't handle changing them so often. The V4's are ok, but they dont respond as quickly and dont have anywhere as much grip as the V12's did. I guess ive been spoiled.

Rsoetidjo

I run 36-37 on the front (because of the engine weight) and 33 on the rear.

Chad05TL

ya the V4's and the V12 do not compare in the slightest. V12's are Z rated and the V4's are H, I think. My handling was drastically improved when I switched from the V4 to the V12. And my gas mileage went up and rolling resistance was decreased. The side walls are stiffer than the V4's. And for a factory Base TL suspension, the V12's are a bit overkill. I felt more bumps with the V12 because the sidewalls are stiffer. But thats how many sport tires are. The stiffer they are , the more you will feel. And from what I understand, a higher speed rated tire typically has a stronger sidewall to support higher speeds. This translates into better handling as well because the side walls dont collapse as easily.

DC2many

Mine are 255/40/17 k110 v12

37/38 psi front cold and 33-36 rear cold I believe

Also have to make up for "possible" tire bowing in the center but 255 seem to actually be the perfect limit on the x8 wheel and kind of looks oem that way



I've only been on these for less than 100 miles so anyone else who has ran these in same size what do you have for psi

Love these tires so far

Chad05TL

If you look on the tire I think the max psi is 50. That is pretty high. but I don't run mine that high. 40psi is hard enough. Seriously, these are strong tires. Anything more than 40psi and it is a rough ride for a TL. I think the tire is overkill for the TL. Especially for stock springs or even the a-spec springs. I have the aspec springs. And the tires still jar more than the suspension gives support. Meaning, the suspension sways a hellova lot more than tires give away. So its not matched properly. I've never felt the tires give out but the suspension leans a lot and thats even on aspec springs.

Anyway, Like any tire, if someone really wants to make a Z tire buckle, you'd have to hit a corner really hard .. but if you want to do that safely, then you'd have to upgrade the the springs and sway bar to match what the tires are doing and then you might have a system that works together. But the TL, in its natural form, and even modified somewhat, still these Z rated tires are more than enough performance for street use. They dont even make a sway bar bigger than 27 or 28mm for the front for these TL's if you were to max out the TL performance..

However, My camaro had a 35mm on the front and I think 25 on the rear. ( I cant rememebr what I installed now). Anyway, all i'm saying is that it's not even possible to mod these cars to a level like a sports car (non-4-door sedan) so why drive it where the tires are buckling? But if you can get these Z-rated tires to buckle, then you're doing some serious G's and you should stay off the road. These V12's are great tires. And the look damn good too.

csmeance

The tires aren't going to "buckle" but rather the higher air pressure will make the tire bow out to the point where a minimal amount of tread is actually on the road. If the pressure is "low" 100% of the width will be on the ground, but the sidewall will be flexing a lot. If the pressure is too high the sidewall will be rigid, but then the contact patch of the tread will be about 65%. If the pressure is at the OPTIMAL level, then 90-95% of the tread will be on the ground with the sidewall being stiff enough to not wobble (and cause a sloppy steering feel) and will be flexible enough to be able absorb rough roads and potholes without damaging the bead.

Chad05TL

so any tire will bow or buckle or whatever you want to call it if pressure is low. so I don't know what's that point of that is... but regarding the pressure and contact area you mentioned, if any of those are actually accurate that is one thing, but besides that, let's say your figures are correct, and if so, then what are we supposed to do, go outside and measure the contact area of our tires and then figure out what that value is? sounds like a bunch of poo poo to me. especially since if I look at the contact area of my tire, or if I even could measure it, the difference between 20 psi and 40 psi might be 5%. So in my opinion your making a big to-do over nothing or at most 5%.

I tell ya what.. you go waste time and effort measuring your contact patch and i will set mine at 40 and be done with it. and spare time for a Margarita. haha

but thanks for the tip

paperboy42190

iTrader: (7)

+1

hansolo2k2

Those Hankook evo V12 tires are the most soft side wall tires I have ever experienced. Very easy to get bubbles if you hit pot holes. I rather stay away from them.

K_Squared

Yeah I can notice it. Looking to get rid of these after I wear them down. Gonna purchase a new wheel and tire set instead.

96SC4

They're ok tires. I got the V12s too...
Will prob get something different next time.
I must say though...they do handle well in the rain. Was surprised by that.

Undying Dreams

iTrader: (3)

I'm still pretty happy with mine. For having 10k miles they're wearing nicely.