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View Full Version : tire pressure help, MYSTIKAL come in pleaseeee


rodo
04-29-2006, 12:55 PM
hey guys, turns out i have 20% tread left on the back tires, WTF. My fronts are perfect and the backs are ok on the sides but in the middle the tread is really low. AKA over inflation, but i put the PSI that the dealer recommended

Conti Sports
225/45/17 all around
325i

front: 32 PSI
back: 34 PSI

thats if i rememebr correctly what they told me

And ive only ran these in the summer as i use winter tires, so WTF? what pressure should i put on them? Thanks*wave*

roxy9
04-29-2006, 03:24 PM
i run my tires at 27psi, it makes the ride a tad more softer and dosent wear the tires as much

rodo
04-29-2006, 03:43 PM
ya, but don't you drive a pick up truck? if so i bet your not gona drive it spiritedly :P

propr'one
04-29-2006, 03:47 PM
stop doing burnouts in reverse

rodo
04-29-2006, 03:56 PM
i dont. Never tried it with my summers. But now when i gun it the tires spin and the back end swings to the side, but thats probably because of over inflation and less contact area with the pavement, however i just checked hte pressure and i had like 34 out back and lowered it to 31-32, is that good?

propr'one
04-29-2006, 04:30 PM
rodo seriously bro, what does it say as MAX PSI on the tires. just fill it to that

bmw_tech84
04-29-2006, 05:05 PM
rodo seriously bro, what does it say as MAX PSI on the tires. just fill it to that

you shouldn't be setting the tire pressure to the MAX PSI rating on the tire. That is just the max psi that the tire can withstand. Rodo How many kms have u put on your summer tires? Also keep in mind that since you have a rear wheel drive vehicle the rear tires will wear quicker than the fronts

ara325
04-29-2006, 05:16 PM
I usually keep mine ~ 36 - 38 psi...but that's a 16" rim so your 17"'s mine perform better at a different pressue. Try it out for a week then change the pressure for a week and see what pressure your car feels tighter at.

rodo
04-29-2006, 06:53 PM
they probably have 25k or so, wtf, fronts are perfect. This is gay, i dont want to shell out 400 bucks, its a ****ing lease

Furious
04-30-2006, 06:40 AM
rodo seriously bro, what does it say as MAX PSI on the tires. just fill it to that


haha Ivan you kill me..

if he ran that max pressure he would have had to make this thread a long long time ago.



you shouldn't be setting the tire pressure to the MAX PSI rating on the tire. That is just the max psi that the tire can withstand. Rodo How many kms have u put on your summer tires? Also keep in mind that since you have a rear wheel drive vehicle the rear tires will wear quicker than the fronts

this is why

Mystikal
04-30-2006, 01:00 PM
The tire pressure could not be 34psi the entire time.

25k is also pretty fast for Contisports. You must launch hard. Also, if you were paying attention earlier you could have roatated F-R a long time ago and avoided this.

propr'one
04-30-2006, 02:53 PM
Mark, my yokohama's evs' say on the side "Max recommended PSI" 34, which is what i run them at. should i be running them at a lower PSI?

rodo
04-30-2006, 04:26 PM
The tire pressure could not be 34psi the entire time.

25k is also pretty fast for Contisports. You must launch hard. Also, if you were paying attention earlier you could have roatated F-R a long time ago and avoided this.



i know, fack, thats what im pissed off about. I never put them on, the shop always swaped the sets. Ugh, what psi do you recommend i run now? because it seems liek they were over inflated since the middle is a lot more worn than the sides (on the rear) and i can't even launch because my car is auto

propr'one
04-30-2006, 04:31 PM
you can still torquelaunch an auto rodo. remember my lexus?

but seriously guys, rodo and i seem to have the same problem. His are conti's, mine are yoko's, what PSI should they be at

rodo
04-30-2006, 04:54 PM
ya but ive never and will never do that. My car deserves respect

propr'one
04-30-2006, 05:10 PM
so driving your car like a grandmother is respecting it? im not saying you should beat on your bmw like i did the lexus because

A) the lexus was a LEXUS and
B) it was a RENTAL

you should've seen a certain someone with a pickup truck at a meet two weeks ago

but torque launching is (as far as i know) the only way of correctly launching an automatic. dropping into drive just seems like a bad idea

but yeah, tire inflation, anyone?

ara325
04-30-2006, 08:13 PM
34 psi seems low to be a max pressure, but if it is, you should probably keep the pressure at 28-30 psi. Changes of temp cause changes in tire pressure so never keep your tires at max. If you really don't drive your car aggressively then you can keep you pressure lower and enjoy the ride comfort, amd vice versa...just my useless .02

propr'one
04-30-2006, 08:31 PM
cool. i'll go check my PSI when i get home. thanks man

Justin e36
04-30-2006, 08:56 PM
propr'one - I doubt 34PSI is the max pressure..... don't see it anywhere on their chart: http://www.tirerack.com/tires/Spec.jsp?make=Yokohama&model=AVS+ES100

Though if I inflated my tires to max PSI I'd be running 51PSI all arond on my ES100's. :|

I'm at 38PSI all around right now, feels better than ever. 32-34PSI is way too squirmy, and a lot of understeer.

ara325
04-30-2006, 09:26 PM
Though if I inflated my tires to max PSI I'd be running 51PSI all arond on my ES100's. :|

I'm at 38PSI all around right now, feels better than ever. 32-34PSI is way too squirmy, and a lot of understeer.

Hey Justin, my pressure's at ~ 38-40 on my es's and they're not squirmy at all.*th-up* It was prolly your pressure before, because i would find the same thing on my old tires when i'd reduce the pressure for an erand run downtown. But once i inflated them higher, the handling was substantially better and easier to control.

Mystikal
05-01-2006, 07:39 PM
I wouldn't go anything below BMW's recommended specs. They're already too soft for hard driving, going below would just be plain unsafe.

rodo
05-01-2006, 07:40 PM
ok they said 32 up front, 34 at the back, but usually theres just 1 or 2 persons in the car, rarely EVER anyone in the back, so should i do 32 all around? Cuz apparently with what they told me the backs got uneven wear due to over inflation

Mystikal
05-01-2006, 07:48 PM
Check the inflation sticker in your car. 34 is for the minimum people, it only goes up from there.

You could run a lower pressure to get better wear, but you'd be compromising performance as well as safety. Your choice, but there is only one right one.

rodo
05-01-2006, 08:08 PM
on the sticker on the door thing, the pressures it says are for maximum load i think, can't I just swap the backs with teh fronts? I dont think the wear is as low as 20%

Mystikal
05-01-2006, 08:14 PM
Well in general you always want the more worn tires on the front of the car, so yeah.

For those curious, it's because if your car hydroplanes you'll want the front to do it rather than the back.

rodo
05-01-2006, 08:18 PM
oh rly eh? because they guy at the shop said i want the good ones in the front for braking and grip. But ****, they should have rotated the fronts to the back a long time ago. Car is a lease and goes back in feb, i dont want to purchase new tires, obviously. Thanks a lot!

Mystikal
05-01-2006, 09:46 PM
Yeah, most guys that work at tire shops don't have a clue. They're taught to mount and dismount, but the physics behind it is completely missing.

rodo
05-01-2006, 09:50 PM
so its actually better to have the worn ones in teh front? If so im going to love you so i dont have to buy 2 new tires :D

how much is each Contisport 225 45 17 anyways?

Mystikal
05-01-2006, 09:59 PM
Yes.

No idea, but I didn't think you had to replace the tires with the same make. You may want to look into that.

Justin e36
05-01-2006, 10:11 PM
Hey Justin, my pressure's at ~ 38-40 on my es's and they're not squirmy at all.*th-up* It was prolly your pressure before, because i would find the same thing on my old tires when i'd reduce the pressure for an erand run downtown. But once i inflated them higher, the handling was substantially better and easier to control.

Neither were mine at first... give it a few months. City driving is still a pain in the arse, even with limited squirm. I'm going to try 42PSI tonight.

rodo
05-01-2006, 10:20 PM
here i took a few quick pics its an american pennie, i duno if theres any size difference with the candian one??


The last picture IMGP3990.jpg is teh front i believe, doesn't seem like a lot more tread but it is, it looks as if it were brand new

ara325
05-02-2006, 01:24 PM
Is the wear-bar flush with the rest of the tread?

rodo
05-02-2006, 09:59 PM
nope. What do u think from the pics, its not thaaat low is it?

Mystikal
05-03-2006, 01:21 AM
I can't tell.

Get a tire depth gauge one of these days. $3.99 at Canadian Tire. :P

rodo
05-03-2006, 02:04 AM
kk ill get one thursday after my last exam. Does that measure in % or waT?

Mystikal
05-03-2006, 02:45 AM
It has mm and 32nds of an inch.

rodo
05-03-2006, 11:02 AM
kk thx bro!

BennyL
05-04-2006, 04:30 PM
wow, you guys run high PSI's in your tires. maybe I should increase mine?

keep in mind, I've got 15-inch rims, on 205/60/15 tires. the max pressure on them is 44. on the door sticker it says 29 for the front and 32 for the back.

I've been running 30 all around, and it seems like my front tires always look a little bit squishy or slightly low on pressure.

should I run something like 35 all around?

Gamite
05-05-2006, 05:36 AM
wow, you guys run high PSI's in your tires. maybe I should increase mine?

keep in mind, I've got 15-inch rims, on 205/60/15 tires. the max pressure on them is 44. on the door sticker it says 29 for the front and 32 for the back.

I've been running 30 all around, and it seems like my front tires always look a little bit squishy or slightly low on pressure.

should I run something like 35 all around?
\
your tire pressure is fine. But its up to you if you want to increase to 35, its still safe.

rodo
05-05-2006, 04:45 PM
ok i just bought the measuring thing:

front: 7/32
back: 4/32

4/32 is the minimum u can return a lease with.... ****

rodo
05-06-2006, 02:17 PM
can you get me 2 rears? conti sports 225 45 17. How much?

Joli
05-06-2006, 03:57 PM
Alright guys.

You are supposed to fill the tire pressure according to your manufacturerer's specs. Look in your owners manual, it will say the PSI. The PSI on the tire is only the max PSI for that tire. The tires on your car should be filled to the PSI recommended by the car, not the tire. Check your owners manual. I'm telling you, this is how you do it, DO NOT fill it according to what the tire says.

BennyL
05-12-2006, 01:06 PM
ya... i think we know that already dude.

Axxe
05-12-2006, 02:51 PM
Rodo, when does the lease finish? If it were my car I'd throw on Hankook K104's on all 4 corners now, have fun with the car, wear the tires as much as you want, and return them with the Hankooks. Keep the contis, just incase you have too much fun with the new tires, and you can swap them over in a pinch (saves you dealer priced tires). Rocco @ RMP does tire swaps for $15 / corner.

http://www.edgeracing.com/tire/1238/

USD, plus shipping. I have a box in Buffalo that you can ship to if you want, and drive down to pick them up.

rodo
05-12-2006, 03:17 PM
thx a lot bro! :) i duno wat were gona do yet, i mean, the tires have 20k, theres no way they can be shot, so were gona give the dealership shit, and if they don't pull through, i guess we won't be buying another car from them come february (thats when the lease is up). Ill let you know tho, thanks a lot :)