I searched and I searched ... and i found different answers hence I created this thread.

What is the ideal tire pressure for the A-Spec wheels.
I see some recommend 42psi, the sticker I believe says 34psi, the dealer always returns it to me with 38 or 39 psi.

Any advice ?

 

I run at 40 all around.

 

IIRC, Acura recommended 39F/36R for the A-Specs.
Tire pressure is variable, so going up or down two or three pounds from recommended should not be an issue-- pick the pressure you feel suits the car best-- ride v. response v. MPG based on your tastes, as long as it does not create undue wear on the tires due to over- or under-inflation.

For example, my TL's door sticker recommends 32F/32R, but I am now running 36F/33R on stock wheels with Advan S.4s, and usually run 37F/34R-- the ride is probably stiffer than a lower pressure, but I like the steering response/feel at the higher psi.

 

80% of maximum tire pressure as a rule of thumb.

 

dont mean to jack the thread, but is 32,33 all around too low for type s wheels?

 

Nope, don't think so. If you mean Type-S wheels on the base car, that's about what's recommended.

If you mean Type-S wheels on a Type-S, the recomendation is 35F/32R iirc.


In general most people seem to run a few psi over the recommendation, but it's up to you based on ride/performance quality. Personally I wouldn't go below 32 for mileage and potential wear.

 

im usually running between 38 and 40 psi after the wheels are hot from driving. 08 base wheels btw

 

Tire pressure should be set when the tires are COLD, i.e. car has not been driven for more than a mile in the past 6-8 hours.

 

in that case, cold psi is about 35, after driving for awhile my psi goes up to 38-40

 

I don't really care how much it is. As long as it's above 32 and they're all the same.

 

It's not the wheels, it's the tires that will cause a deviation in pressures. If the tires are the same as the OE tires, size, make, model, load rating, then use the factory specs, but if a tire with a different spec is used, then in some cases the perfect air pressure to equate to the factory specs, can actually be lower, especially with different size/load rated tires.

 

I like keeping around 36 front, 34 rear. I don't really have an explanation as to why. lol

 

I keep my 245/40/18's on A-Specs at 38 front & 36 rear when cold.

 

yes type s wheels on base car, thanks. and just curious, why different between base and type s?

 

Why Acura recommends it I can only speculate.

I guess it's a combination of a bit more power and the changes (firmer mostly) in the suspension in the TL-S. The way they've set the tire pressures (I believe. I know others disagree) increases understeer bias since understeer is easier to correct than oversteer.

IOW - they've set it up so if you get in trouble, it's less likely you'll lose the backend.

 

I have Firestone Firehawk Wide Oval Indy 500's and their max pressure is 50psi...I usually run 36-38psi....summers get crazy and I drive a lot of highway so dont run 40...else I would run 40psi all year long...

 

I found with stock michelin mxm4 on my 07 base that setting tje recommended 240f/220r made the ride very smooth and enjoyable. I think the compurer likes it too.

 

OEM 18 inch aspec is 39 front/36 rear.
OEM 17 inch base wheels 6MT is 35 fr/32 rr.
OEM 17 inch base wheels 5AT is 32 fr/32 rr.
i would assume the type-s numbers would be similar.

depending on the tire, you may run over the OEM numbers as those were spec'd for the OEM stock michelins/bridgestones.

some tire manufacturers have put up tire pressure numbers if you have plus sized your wheels over OEM or using a non-OEM tire size.

i'm running +3 psi on enkei 18's (38/35) with conti DWS tires. so depending on what feel you like, on your tires you can play with the psi's based on how the car feels when you're driving it.

the tech's at the dealer inherently like to put my psi's back at 32 all corners...its automatic for them to do that since they dont' see to many MT. its annoying. if they know its aspec then they will probably set it at 39.

 

Type-S with OE 17" wheels, same as 6MT above.

 

I would NOT care about rims when checking/running a certain pressure...there is a reason its called tire pressure and not rim/wheel pressure....some tires have a max psi of 50 and some have that of 40...When running a tire of max psi of 40, I would NOT recommend running anything above 32 even thow you might be on BBS or Enkei or "whatever" rims...

Again this is COLD pressure....when you walk upto your car in the morning I would suggest checking the pressure and adding/reducing it within a mile of driving....

 

^^^rim size is relative to tire size. The manufacturer spec'd these wheels and tires already for the car. I never said anything about rim size to psi. I could have easily put tire size in place of the wheel size (235/45/17 vs 235/40/18). Is that better? These are for oem specifications. If running a fatter or skinnier tire...psi may change, or stay the same based on those spec's. Yes it is dependent on the tire, which I agree with you on. Sorry for any misunderstanding.

 

^^^ Yeah I think we kinda misunderstood each other....

what i was saying is the pressure completely depends on the tire specs (whats written on the tires) and not on aspec rims or enkei rims or the tire sizes....

 

yup, i hear ya! that's why there is so much variability. i was just giving the OP his "ideal" psi measurements...then he can play with them from there.

to OP- just dont' go below 32. see what you like at or above this number, but i believe the answer for your question has been provided.

 

I know it's been said already but ideal pressures go out the window when you change to a non factory tire especailly one that has a different load rating or is a different size.

I used to go by the max sidewall psi as a rough estimate but going to the track shows otherwise. My NT05s have 50 or 55psi as the max but if they go past 38psi HOT, the grip goes down noticeably. I have them at 32 cold even though the max is 50psi or above. They also wear more in the center even at moderate pressures. You pretty much have to find what's best for you on an individual basis. 35psi as a starting point will always work and adjust from there.

My old BFG G-force Sports liked 42psi FWIW which I think was near the max inflation pressure.

The small changes in F/R distribution on the stock tires on different model TLs is probably because of changes in suspension tuning and expected driving style. If we were all going to use the TL only for the grocery store and never exceed 35mph or corner hard, I'm sure 25-28psi would work fine. To show a huge range, my Hoosiers on the GN are run at 25psi on the street for fun driving but 12psi on the track or for a money street race. You just have to experiment.

 

I always kept then 36 PSI in the summer and 38 PSI in the winter.

 

I've heard this number comes from the sticker that comes with the wheels, but according to Bernardi's official Acura installation documents, the tire pressure should be 38/35 with 18" A-Spec wheels. So +3 from stock.

http://acura.bernardiparts.com/Image...l_BII33639.pdf

 

>58

I'm just kidding. The manual says 33/32 for me, but going a little higher was better for me. Stupid me, filled up the tires on sunny cool day. One side of the car was warm from the sun and other side cool. I was wondering why the hell is one side way higher than the other as I was driving.