MK5 Golf GTI

All Things Mk5 => Mk5 General Area => Topic started by: candy turbo on November 30, 2009, 09:50:25 pm

Title: tyre pressures
Post by: candy turbo on November 30, 2009, 09:50:25 pm
how do you work out your tyre pressure ?  i have gone from 7.5 x 18 with 225/40/18 to 8x19 with 225/35/19 how do i calculate the correct tyre pressure ?????  any one  :happy2:
Title: Re: tyre pressures
Post by: bacillus on November 30, 2009, 11:15:08 pm
This is a smart ass reply but see if you can locate the recommended tyre pressure for the Golf R as iirc it comes with 19" rims. Apart from that you just have to experiment...
Title: Re: tyre pressures
Post by: stealthwolf on November 30, 2009, 11:40:33 pm
What does the tyre manufacturer advise?
Title: Re: tyre pressures
Post by: Andy on November 30, 2009, 11:47:50 pm
i would try 34psi front and 32psi rear-take it for a drive and see how it goes
Title: Re: tyre pressures
Post by: gazbutS3 on December 01, 2009, 07:02:53 am
I've played around with the pressures on mine. The book says something odd like 34.5 front and 30 rear for the std 225/40/18's can't remember exactly. I've tried this on the 19's and didn't get on with it, tried 34.5's all round, no good either. I now run 32.5 front and rear and I'm happy with it. I think sometimes the make of tyre can make a difference to finding pressures your happy with as the stiffness can vary from make to make :smiley:
Title: Re: tyre pressures
Post by: candy turbo on December 01, 2009, 09:13:49 pm
someone once told me that for every increase in size or tyre width how to work it out but cant remember , guy i had the wheels off says 32 psi so ill put them all to that and see how we go  :happy2:
Title: Re: tyre pressures
Post by: xxx_mojo_xxx on December 02, 2009, 09:06:49 pm
I've got 32psi all round... seems to be ok.
Title: Re: tyre pressures
Post by: RedRobin on December 02, 2009, 09:32:03 pm
....

I run 37 psi in 225/40/18 Goodyear Assymetrics on OZ 18x8 lightweight 8 Kg Alleggerita's. Happy in both wet and dry.
Title: Re: tyre pressures
Post by: Andy on December 02, 2009, 09:42:50 pm
....

I run 37 psi in 225/40/18 Goodyear Assymetrics on OZ 18x8 lightweight 8 Kg Alleggerita's. Happy in both wet and dry.
just keep a watch on the center tread of the tyres if you are running them at that pressure RR,as it will wear it down quicker
Title: Re: tyre pressures
Post by: RedRobin on December 02, 2009, 11:15:27 pm

I run 37 psi in 225/40/18 Goodyear Assymetrics on OZ 18x8 lightweight 8 Kg Alleggerita's. Happy in both wet and dry.


just keep a watch on the center tread of the tyres if you are running them at that pressure RR,as it will wear it down quicker


....Will do. I check the tyres very regularly.
Title: Re: tyre pressures
Post by: JPC on December 02, 2009, 11:36:56 pm
I run 33-34 all round. I found Goodyear eagle f1s very sensitive to lower pressures. Anything under 32 and it felt rubbish.
Title: Re: tyre pressures
Post by: RedRobin on December 03, 2009, 12:11:32 am
....

I know that having a TyreSure monitor is a completely unnecessary gadget but I have to say that I really enjoy having it and having the unadulterated luxury of constantly knowing exactly the tyre pressure (and temperature) in each wheel.

It has shown me how much pressures can fluctuate.
Title: Re: tyre pressures
Post by: xxx_mojo_xxx on December 03, 2009, 12:17:20 am
....

I know that having a TyreSure monitor is a completely unnecessary gadget but I have to say that I really enjoy having it and having the unadulterated luxury of constantly knowing exactly the tyre pressure (and temperature) in each wheel.

It has shown me how much pressures can fluctuate.

RR try inflating your tyres with nitrogen - I'd be interested to compare tyre temperature and pressure fluctuations. 

I've been told that nitrogen doesn't expand unlike compressed air....
Title: Re: tyre pressures
Post by: JPC on December 03, 2009, 12:18:57 am
It will be but it's not affected by the sort of operating temps found on a road tyre. To the point where it hardly changes
Title: Re: tyre pressures
Post by: Janner_Sy on December 03, 2009, 08:39:28 am
....

I know that having a TyreSure monitor is a completely unnecessary gadget but I have to say that I really enjoy having it and having the unadulterated luxury of constantly knowing exactly the tyre pressure (and temperature) in each wheel.

It has shown me how much pressures can fluctuate.

like the idea of knowing the temps, that would be especially good if you had toyo R888s which need a bit of heat in them if its not that warm out. what s the norm temp for tyres in normal driving and in hard driving then?
Title: Re: tyre pressures
Post by: RedRobin on December 03, 2009, 10:16:55 am

like the idea of knowing the temps, that would be especially good if you had toyo R888s which need a bit of heat in them if its not that warm out. what s the norm temp for tyres in normal driving and in hard driving then?


....Which is exactly why Hurdy got his TyreSure as he runs on R888's at times.

Yesterday my tyres started off at only 4ºC and rose to about 22ºC - It really depends on the day's weather and also because you don't tend to push your luck too much on public roads if the weather and conditions are restrictive.

I need to make some records of such info. Perhaps Hurdy already has some info - He's great at data.
Title: Re: tyre pressures
Post by: animal on December 03, 2009, 03:50:21 pm
I run 33-34 all round. I found Goodyear eagle f1s very sensitive to lower pressures. Anything under 32 and it felt rubbish.

I'll second that! Makes a huge difference if they drop off a bit.
Title: Re: tyre pressures
Post by: xxx_mojo_xxx on December 03, 2009, 05:02:51 pm
What tyre pressure are you guys running/recommend for Michelin Pilot Sport 2s?
Title: Re: tyre pressures
Post by: edition_30 on December 03, 2009, 05:57:56 pm
I'm currently running 45 all round.. seems fine to me
Title: Re: tyre pressures
Post by: xxx_mojo_xxx on December 03, 2009, 06:13:43 pm
I'm currently running 45 all round.. seems fine to me
Is this on the michies?
Title: Re: tyre pressures
Post by: bacillus on December 03, 2009, 07:24:33 pm
I'm currently running 45 all round.. seems fine to me

Seems a bit excessive...   
Title: Re: tyre pressures
Post by: edition_30 on December 03, 2009, 09:45:02 pm
I'm currently running 45 all round.. seems fine to me

Seems a bit excessive...   

Do you think? the ride feels okay.. little stiff but generally feels OK.. im currently on factory tyres, dunlop @ the front & contis & thee back.. any ideas on what sort of pressures i should be running?
Title: Re: tyre pressures
Post by: xxx_mojo_xxx on December 03, 2009, 09:45:56 pm
I thought it was 34psi all round
Title: Re: tyre pressures
Post by: Oli on December 03, 2009, 10:12:32 pm
I think I ran 40 allround on my S3 with 19s. Have you asked over on Audisport.net, I'm sure that's where I got my answers last time - lot of S3 drivers over there.
Title: Re: tyre pressures
Post by: Andy on December 04, 2009, 01:42:52 am
I'm currently running 45 all round.. seems fine to me

Seems a bit excessive...   

Do you think? the ride feels okay.. little stiff but generally feels OK.. im currently on factory tyres, dunlop @ the front & contis & thee back.. any ideas on what sort of pressures i should be running?
the tyre pressure's are inside the fuel flap
think yours will be 34psi front & 32 psi rear
Title: Re: tyre pressures
Post by: matsu on December 04, 2009, 08:49:56 am
i now run 40 all round anything less is awful on these falkens and the lm reps.
there was a big thread not so long ago about using higher pressures which TT had a big input on i seem to remember! thats why i decided to go higher and also a bit of trial and error with these new rims.
ride feels better and i dont feel every bump and cornering is much better also.
lets see how the tread lasts but i,ll be changing brands soon as i ca anyway