Tire Pressure Question

[Roadkill]

Hey all,

I've got the stock Diamaris 19's and was curious about what pressures everybody else is running. The car came with over inflated tires so I reduced the pressures to the stock setting of 32psi. However, at that pressure, the tires have a somewhat flat look to them particularly in the front. Is this normal or have you guys added a few pounds? TIA.

P.S. Tires were measured in the morning. Cold, no driving on them.

[bobby]

32 psi seems about right

[FSETH]

Personally, I run what the door jam recommends for my partucular wheel setup and typical passenger/cargo load.

[dkl]

Originally Posted by dinan e39

Hey all,

I've got the stock Diamaris 19's and was curious about what pressures everybody else is running. The car came with over inflated tires so I reduced the pressures to the stock setting of 32psi. However, at that pressure, the tires have a somewhat flat look to them particularly in the front. Is this normal or have you guys added a few pounds? TIA.

P.S. Tires were measured in the morning. Cold, no driving on them.

That's typical of radial tires. They will always look somewhat flat...that's why you can't really judge just by looking at them. You just have to trust your calibrated tire gauge.

[Roadkill]

thanks guys for the responses. just wanted to make sure.

[x5pdx]

i thought the same thing as you with 32 psi. When I took my car to a bmw indy shop in for an oil change last november, they inflated it to 48 psi and my tpms came on. i checked the tire pressure and then called them to ask why it was at 48 psi. they told me it's better to run my tires at max during the winter. i deflated back to 35 psi and never went back there again.

those diamaris tires lasted about 1 year/22k miles for me. didn't like them.

[Roadkill]

that's interesting because mine had 42psi in them when checked. i just thought that the rough ride was due to the sport suspension. what a difference 10 psi made! anyway, good to know that many others are having the same experience as me.

[x5pdx]

Originally Posted by dinan e39

that's interesting because mine had 42psi in them when checked. i just thought that the rough ride was due to the sport suspension. what a difference 10 psi made! anyway, good to know that many others are having the same experience as me.

it's probably is due to sport susp. it's a stiffer ride. more air = more cushion = uneven tire wear.

[FSETH]

Originally Posted by x5pdx

more air = more cushion

More air = less cushion/firmer ride...

[crasshh]

Originally Posted by x5pdx

i thought the same thing as you with 32 psi. When I took my car to a bmw indy shop in for an oil change last november, they inflated it to 48 psi and my tpms came on. i checked the tire pressure and then called them to ask why it was at 48 psi. they told me it's better to run my tires at max during the winter. i deflated back to 35 psi and never went back there again.

those diamaris tires lasted about 1 year/22k miles for me. didn't like them.

Interesting, I went to the BMW dealership and they inflated my fronts to 36. When i questioned them about this they replied that is normal, this isn't what the manual recommends (had me question if the BMW rep knew wht he was talkin about). The ride is somewhat bumpy now. I will scale back to about 33-34. 32 looks too flat for me.