3.3TT Rear tire pressure

[Manaz]

Low profile wheels need higher pressure to keep from bending wheels on potholes.

Higher pressure in the rear will make the car more twitchy (oversteer)
Lower pressure in the rear will make it more stable on the highway (understeer)

Higher pressure makes the ride harder in general.

This is all true. Higher pressure also impacts tyre wear (over-inflated tyres will wear out the centre of the tread, leaving the outside edges less worn). In extremes, it also reduces the size of the contact patch with the road.

Lower pressures also lead to increased fuel consumption.

The 50psi to 60psi that some people are finding their cars are set at is just nuts - I get why it might be done before a car is put on a ship/transporter, but as I've noted, fixing it back to tyre placard settings is something that the dealerships should be doing as part of their pre-delivery work (I'm not sure how it works in other markets, but dealerships in Australia charge a pre-delivery fee as part of the sale).

 

[Manaz]

Those pressures are for the 18" rims.

Is there a separate placard for the 19" rims?

 

[Manaz]

So for those of you obviously bothered by this... What did YOU check on pre-delivery?

I wasn't aware that the dealership was paying me for pre-delivery checks - I thought it worked the other way around.

I do take the point that we're all also responsible for checking basics like oil and water levels, tyre pressures, etc. I've become accustomed to checking my tyre pressures every time I fill up with fuel.

That doesn't excuse the dealerships for releasing cars with 50+psi in the tyres though.

 

[19GT-AWD]

Those pressures are for the 18" rims.

My original post in this thread referred to what I found on my door jam.

In my case, that is for the 18" A/S tire option. Whatever combo people have, the door jam numbers are your reference.

It is what it is ...

 

[19GT-AWD]

Is there a separate placard for the 19" rims?

Check you door jam.

 

[Manaz]

Check you door jam.

I don't have a Stinger with 19" wheels. It will have 19" wheels on it when it arrives, but I am seriously considering going back to 18" wheels for a variety of reasons - cheaper tyres, taller sidewalls providing slightly better ride and avoidance of pot-hole damage (Sydney roads are crap).

I was wondering if Kia was advising a different pressure based on the comment from Silverghost that the pressures in that diagram are for 18" wheels. I'd be a little surprised if they do, 18" and 19" wheels really aren't that different.

 

[Capecod]

Is there a separate placard for the 19" rims?

Yes and if you don't have this then the speed is limited to 130MPH.

 

[RUFFSTUFF]

I wasn't aware that the dealership was paying me for pre-delivery checks - I thought it worked the other way around.

I do take the point that we're all also responsible for checking basics like oil and water levels, tyre pressures, etc. I've become accustomed to checking my tyre pressures every time I fill up with fuel.

That doesn't excuse the dealerships for releasing cars with 50+psi in the tyres though.

You get what you inspect not what you expect.

 

[nhcowboy28]

 

[Manaz]

That's quite interesting. Quite a lot of variation across the various variants.

 

[19GT-AWD]

I wasn't aware that the dealership was paying me for pre-delivery checks ... That doesn't excuse the dealerships for releasing cars with 50+psi in the tyres though.

Well stated.

... I'd be a little surprised if they do, 18" and 19" wheels really aren't that different.

19" rims are staggered, 18" are not. Also, different tires as well.

You get what you inspect not what you expect.

You should get what you expect, not what is given to you.

 

[Manaz]

Yes and if you don't have this then the speed is limited to 130MPH.

That's basically 210km/h. My 2.5L turbo Liberty (Legacy in the US) GT Spec.B with ~200kW at the wheels barely gets to 200km/h down the main straight at my local racetrack (Eastern Creek, aka Sydney Motorsport Park). I've seen 200km/h once on public roads (and legally, in the Northern Territory where there was an open speed limit on some roads for a while).

That 130MPH limit wouldn't restrict too many people I suspect.

 

[Capecod]

That's basically 210km/h. My 2.5L turbo Liberty (Legacy in the US) GT Spec.B with ~200kW at the wheels barely gets to 200km/h down the main straight at my local racetrack (Eastern Creek, aka Sydney Motorsport Park). I've seen 200km/h once on public roads (and legally, in the Northern Territory where there was an open speed limit on some roads for a while).

That 130MPH limit wouldn't restrict too many people I suspect.

True, more bragging rights though

 

[nhcowboy28]

You should get what you expect, not what is given to you.

I’ve seen that in a fortune cookie....

 

[Ozstung]

Yes and if you don't have this then the speed is limited to 130MPH.

View attachment 24415

My Gt (2) premium placard reads 36 front 38 rear.

 

[Ozstung]

I’ve seen that in a fortune cookie....

What about after a hash cookie?

 

[Capecod]

My Gt (2) premium placard reads 36 front 38 rear.

Just one more thing the opposite of what we do did yours come with continental or Michelin tires?

 

[RUFFSTUFF]

Well stated.



19" rims are staggered, 18" are not. Also, different tires as well.



You should get what you expect, not what is given to you.

Nice try, but nope.

 

[Christopher Léger]

Low profile wheels need higher pressure to keep from bending wheels on potholes.

Higher pressure in the rear will make the car more twitchy (oversteer)
Lower pressure in the rear will make it more stable on the highway (understeer)

Higher pressure makes the ride harder in general.

42 psi didnt prevent the pothole from bending my mag.. they tried fixing it and got it to 95%

 

[RLittle]

42 psi didnt prevent the pothole from bending my mag.. they tried fixing it and got it to 95%

Must have been a big hit!
18 or 19” wheels?