Author Topic: PSI for low profile tyres? (Read 6741 times)

Black_Serenade · « **on:** Jul 23, 2007, 12:58AM »

hey guys i just got some nice new 17s for my bluey and of course ive got some low profile tyres on there..well they are 215/45/17 But im totally unsure of what PSI they should be inflated to... i forgot the ask the pals at the tyre place and the tyres dont have it printed on them ..they have a max PSI of 50 and a max weight allowance on it ..they are Kumho

Jason · « **Reply #1 on:** Jul 23, 2007, 03:16PM »

Id put around 40 pound in them, there should be a recomended tyre pressure on the tyre wall.

Kranzy · « **Reply #2 on:** Jul 23, 2007, 04:01PM »

I run 215/40 r17 with 42psi daily, my mech recommended between 40-44psi.

CORz4CoNCeRN · « **Reply #3 on:** Jul 23, 2007, 08:55PM »

Yup what he said..any lower than 40 screws the inner walls of ur tyre leadin to cracks/bubbles/pinches...and theres no warranty for that sh!t....

What sorta rims u get??

Budgie · « **Reply #4 on:** Jul 23, 2007, 09:31PM »

Indeed, I run 40psi in my bluebirds tyres (215/40/17).

CORz4CoNCeRN · « **Reply #5 on:** Jul 23, 2007, 09:38PM »

Heres a pic of my Rims n Rubber...haven't seen anyone else with the same type..think they're Italian??Advanti Atomics- Lite weight as..set the car off 2!!

xxxx · « **Reply #6 on:** Jul 23, 2007, 10:08PM »

thats some farkn hot rims man! + karma because i just creamed my pants

Budgie · « **Reply #7 on:** Jul 23, 2007, 10:16PM »

Yeah not bad. A shot from a better angle would be nice tho champ!!

Black_Serenade · « **Reply #8 on:** Jul 23, 2007, 11:26PM »

Quote from: CORz4CoNCeRN on Jul 23, 2007, 08:55PM

Yup what he said..any lower than 40 screws the inner walls of ur tyre leadin to cracks/bubbles/pinches...and theres no warranty for that sh!t....
What sorta rims u get??

I got some of these babies ..17s ..i dont have a picture of them on my car yet..for the fact that im waiting for my springs to come in and time to get my car to my mechanic to do it for me.. and it looks crap floating 40ft in the air at the moment lol.. but yeah those

The only difference is that my centre things looks different..its just flat with a starcorp logo on it ..

CORz4CoNCeRN · « **Reply #9 on:** Jul 24, 2007, 05:50PM »

Aww cheers..them ones u lookin at look hella stealth...I love machined faced rims-sex on wheels!!
New Rims just set your car off ten fold ai...end up doin laps lookin for shop fronts to check out ur reflection! LOL

Heres a better pic of my Rims..

And..

Black_Serenade · « **Reply #10 on:** Jul 24, 2007, 10:40PM »

nice rims mate

CS2rex · « **Reply #11 on:** Jul 25, 2007, 07:17PM »

Quote from: CORz4CoNCeRN on Jul 24, 2007, 05:50PM

I love machined faced rims - sex on wheels!!

im sure there was no pun intended haha

Carbon-goodness · « **Reply #12 on:** Jul 25, 2007, 10:57PM »

Quote from: Black_Serenade on Jul 23, 2007, 11:26PM

I got some of these babies ..17s ..

hehe, i considered gettin these rims, but then realised i got no $$$$

now considering a couple of others....

http://www.tempetyres.com.au/products_closeup.asp?part=&part_no=1159

or

http://www.tempetyres.com.au/products_closeup.asp?part=&part_no=818

we'll see how much tax we get back....

Black_Serenade · « **Reply #13 on:** Jul 26, 2007, 02:42AM »

ghetto ass pic on my phone lol ..kinda get the idea.. i just got it lowered today. the springs should sag another .5 inch too . it looks mean as hell now...pic doesnt do it justice

BILL*69 · « **Reply #14 on:** Jul 26, 2007, 07:59PM »

Nice choices in both cases. Very sexy.

Now, i have no idea about anything, and i dont want to get flamed for this, im looking for honest information...

My old man was a mechanic for his whole life, its what he did until he injured his back and needed urgent surgery, and continuing his work was too painful. He tells me to run about 33PSI or something like that.. I will double check with him soon and go pump them up tonight. Is there anything wrong with this pressure?? Pros (if any) and cons would be nice.. As i said, i have no idea, just keeping gramps happy, so any informative replies are appreciated.. Thanks guys.

Kranzy · « **Reply #15 on:** Jul 26, 2007, 09:39PM »

Far to low for low profile tyres. You'll find with low pressure there is more stress on the sidewall as they need to be pumped up to support the weight better.

I really didnt explain that very well but you will find poor economy, increased wear, and overall bad handling. 40-44psi is what you want for 215/40r17 or even 45 profile tyres.

BILL*69 · « **Reply #16 on:** Jul 27, 2007, 05:51PM »

Thanks Kranz. Had a chat to the old fart today, he said 30 again. Then i said what about higher pressures eg 40, and he said theres nothing wrong with it, and went on explaining his side of the argument. ALl in all, the result being he said 'Try different pressures and see what you personally like'.. So i will be hikin them pressures up very soon to have a feel!!

Once again, cheers.

bogan_bob · « **Reply #17 on:** Jul 30, 2007, 09:58PM »

ah good timing for this thread. Was wondering what psi my new tyres (i think they are 17s) would need, i was assuming the old 32 psi like the r31 needed

BILL*69 · « **Reply #18 on:** Jul 30, 2007, 10:28PM »

I was advised to run 40 to 44 psi Dion. i also have 17's

Marty · « **Reply #19 on:** Jul 31, 2007, 04:23PM »

Im sure mine say max 40 on the side, and never above 50
I have it on 38 front 36 rear (215/40R17)

CORz4CoNCeRN · « **Reply #20 on:** Aug 1, 2007, 01:14PM »

50 psi is a bit extreme..my mates a tyre fitter n had a low profile tyre blow up nxt to his head..apparently ur ears natural defense to that is massive wax build up or "EAR BooGERS"..thats shits nasty but even just goin out ravin gives em to ya....mite go get my ears cleaned out...
Sick and tired of sayin "WOT?" and tryin to lip read at work..

Yeah when my tyres were new I gave my mates bike a tow on a trailer from motorvation...and i had way too low psi-like 32.. anyway just changing lanes and hittin a cats eye made the hugest slam and I had pinched the inner wall leavin a nice lil egg on $300 rubber...

I thought i get warranty for this shit but nope...VOID cos U RAN IT FLAT!!

Expensive Lesson Learnt....

dave-trx · « **Reply #21 on:** Aug 7, 2007, 04:27AM »

Quote from: Budgie on Jul 23, 2007, 09:31PM

Indeed, I run 40psi in my bluebirds tyres (215/40/17).

Jeez that must give a hard ride. I run 36psi in the Navara 265/75/16 and that harsh enough of a ride. Plus your car being lowered.

BILL*69 · « **Reply #22 on:** Aug 7, 2007, 09:01PM »

I am now running 40 PSI, and no problems whatsoever.

Budgie · « **Reply #23 on:** Aug 7, 2007, 09:05PM »

Quote from: dave-trx on Aug 7, 2007, 04:27AM

Jeez that must give a hard ride. I run 36psi in the Navara 265/75/16 and that harsh enough of a ride. Plus your car being lowered.

I consider it to be a 'strong' ride dave

Plus the tyres seem to have worn well considering the angry camber on the front end of the car.

w0057663 · « **Reply #24 on:** Aug 11, 2007, 02:43PM »

it seems like this question has been answered...however, i have a slight dilemma...they tyre blokes (who fitted my new 17" chromies yesterday has labeled them to be inflated to 36psi...)

i have a 7.5inch rims therefore runnin 215/40r17's...
what u reckon?

Carbon-goodness · « **Reply #25 on:** Aug 11, 2007, 10:08PM »

well, condsidering what has been said in this thread, amp it up to 40psi

i run 36psi on me stocko trx wheels (195/65/14)

Vithy · « **Reply #26 on:** Aug 12, 2007, 06:13PM »

im running 35psi on my stocks....couldnt find recommended pressure on the freakin tire so i went by the sign at BP lol

slim · « **Reply #27 on:** Aug 12, 2007, 08:21PM »

Everyone here is aware that your tyres pressure's increase depending on the tyres temperature and alter the pressures.
Nitrogen is used as to prevent changing tyre pressures.
I have nitrogen and the pressures at 35psi fronts and its a sensitive ride picking up the majority of bumps on my travels.
There is no noticeable difference from winter to summer, and short to long drives, in the hardeness of the tyres.

Just my 2 cents