tyre pressures?

[G-Lader 0]

Anyone know the correct tyre pressures for a G60 with BBS and 195/50/15 tyres pls

[G-Lader 0]

put 30 in the front and 28 in the back - in the absence of a handbook (those garage air pressure meter's are so in accurate compared to gauges you take yourself!)

[G60Jet 1]

harry1000, there is a sticker on your b-piller that tells you tyre pressures

[G-Lader 0]

doh......41 front/36 rear - thanks (that's high,would never have guessed it!)

[Supercharged 2]

The manufacturers pressures are way too high.... I run mine at 33 front and 30 back - you should just experiment and see which feels best...

 

most tyre places will tell you 41 is way too high especially as this is a cold pressure... when hot this will go up to 47 psi - a two-tonne transit would run on that kind of pressure!!

 

VR's may need a bit more because of the extra weight at the front of the car but i think a difference of about 3psi between the front and back is perfect for the G60

[Andi 2,147,483,647]

The VR states 36 front and 32 rear - thats half-load.

 

I am suprised the G60 sticker states higher, since the VR is a considerably more heavy engine!

 

I'd agree with Supercharged, however, you have to remember that different tyres react in different ways and different pressures. It's not as simple as one pressure is the de facto answer for all G60 owners.

 

I've experimented with mine, and found the recommended 36/32 for the VR works fine - but thats on 205/40/17 Avon ZZ1s. Others may find it different.

 

My neighbour's Celica GT4 runs 40 psi at the fronts, and they still look like they're under-pressured :?

[G60Jet 1]

Supercharged, It is worth pointing out that under inflating tyres is very dangerous and can cause major tyre wall damage and handling problems. if you car handles better on under inflated tyres then you have a suspension problems somewhere else.

 

The same goes for over inflating your tyres, tyre can get to hot and explode in extrame cases.

 

If you dont have standard rims, then i would consult your local wheel and tyre specialist. I.E someone that is trained to do the job.

[CazzaVR 0]

Hopefully getting 17's on this week- what pressure do they need?

[G60Jet 1]

andyg60, Speak to a wheel specialist

[G-Lader 0]

supercharged - think you r right,driving for a couple of days on 41/36 and it feels too hard,felt better at 30/28!

[Supercharged 2]

Well that’s what I found, I did get advice from several garages about this with the corrado and when I had my mk2 golf (same size wheels and tyres) they all recommend 28-30 psi, and also all seem to think the manufacturer recomendations are far too high on most cars!?! - why, I dont know.

 

My car is meant to be 38 front, 34 back on half load - I ran my car at that for 6 months when i first got it as it was fairly original and FVAGSH and wanted it back exactly as it came out the factory before i started to do any subtle modifications\upgrades - passat door handles/wipers etc

 

(it had an awful set off 17's on it and i immediatly changed them for a set of original (optional) BBS splitrim's which improved the ride considerably - alot of people put 17's on as they definetly look better sized for the car but most of these people then miss the handling of the originals and decide to go back to what the car (and the speedometer) was designed around.

 

After the advice, I now run my BBS's 33front\30back - boot is normally loaded with work stuff (not particularly heavy tho...) - I should point out that I have standard suspension, ABS brakes and TOP quality tyres - Yoko A539 195/50/15V (fantastic).

 

G60jet has a good point as well, not every thing written on this forum is necessarily correct or the best thing to do (that goes for the internet as a whole), most of us are enthusiasts passing on knowledge and giving advice based on past experience, and it is worth getting professional advice before doing anything that you are not entirely sure about!!

 

Hope this helps

[G-Lader 0]

yeah supercharged....good starting point to try 33/30,think I'll start there - ride was crap with 41/36!!

Cheers

[spoier 0]

I think I have an ideal why the recommended pressures are higher than they should be - probably for the same reason most oil viscosities are lower than they should be, because it helps the manufacturer squeak by the emissions and miles-per-gallon government requirements. If I'm not mistaken a higher inflated tire will create less drag and a 1 mpg difference can save the factory millions in tax...

 

The correct way to figure out your pressures would be to go out on a skid pad (or a local autocross) and do tire temp tests on the inside, middle and outside of the tread, and also use the "shoe polish" trick to see what kind of sidewall roll you're getting. You want the pressure high enough to have little sidewall rolling, but not so much that the tread is "balooned" out or convex. From a performance perspective that would get you the perfect setting but from a comfort perspective it will probably be way to hard. (for more information go to any autocross bbs like grmotorsports.com)

 

Tire pressures will also change your understeer/oversteer characteristics near the limit so that has to be taken into account as well. So you are dealing with four different requirements: comfort, (cornering) performance, at the limit behaviour, and tire wear and your settings will fall somewhere in that "square" depending on what you are after....

 

Skye