Noob Question On Tyres

[Acehole]

thanks

acehole

[Meister]

Hi RIB

That's interesting I run mine 26 Front and 28 Rear. This is based on a American manual I downloaded from the internet ( As they were fitted as standard on 111R ).

 

 

 

Out of interest where did you get your pressure recommendations from?

Mark

Tyres.tiff

[M@r]{]

Steve Guglielmi (sp?) advised me 22 and 24 when I had my Elises. One thing I can't remember is if that was when the tyres are cold or not. If so after you've driven and warmed them up it would be more like 24 ams 26

 

Therefore I have been no help whatsoever

[scatty]

I tend to have mine 25 all round or 24 front and 26 rears...

[Meister]

I am really interested in this tyre pressure question.

Any more offers on what pressure you use on your AD07's ?

Mark

[R.I.B.]

I find just a change 1-2psi of pressure makes a massive difference to the way the car feels. You might get better MPG with them higher but I've had these tyres at 22 and 24 psi (cold) on the advice from Mike at sports car services and he definitely knows a lot more than me with his history in racing teams etc

 

I use my car every day with 2-3 track days a year and my ad07 tyre wear from new at 22-24psi are very evenly worn and give great balance between understeer and oversteer.

My first set of tyres I got through with the factory pressures was much more worn in the middle of the tyre, the second set of tyres running a bit under factory settings was also more worn in the middle of the rear tyres.

If it tends to want to oversteer you could just add a couple of psi in the front to run 24-24.

 

It's all about getting the tyres to be at the ideal pressure when they're being used. Loads of things can change the cold tyre pressure settings like driving styles, geo set up, track temperature, air temp etc.

[Meister]

I find just a change 1-2psi of pressure makes a massive difference to the way the car feels. You might get better MPG with them higher but I've had these tyres at 22 and 24 psi (cold) on the advice from Mike at sports car services and he definitely knows a lot more than me with his history in racing teams etc

 

I use my car every day with 2-3 track days a year and my ad07 tyre wear from new at 22-24psi are very evenly worn and give great balance between understeer and oversteer.

My first set of tyres I got through with the factory pressures was much more worn in the middle of the tyre, the second set of tyres running a bit under factory settings was also more worn in the middle of the rear tyres.

If it tends to want to oversteer you could just add a couple of psi in the front to run 24-24.

 

It's all about getting the tyres to be at the ideal pressure when they're being used. Loads of things can change the cold tyre pressure settings like driving styles, geo set up, track temperature, air temp etc.

 

Thanks for your comments RIB.

Mark

[stockhome]

22 24 for me too

[Hammered]

And me 22- 24 ish dependent on conditions

[Wild]

I am really interested in this tyre pressure question.

Any more offers on what pressure you use on your AD07's ?

Mark

 

I've stuck with 23 front and 25 rear, which seems to have been fine.

[Acehole]

well the tyres are on, already feel much better even though only tootling along at the moment.

thanks to all for the advice and guidance given.

if anybody wants the old front tyres I have taken off they are free to a good home if someone is looking for some fronts to destroy on a track day.

they are bridgestone potenza 175/55 r 16 looks like about 7mm of tread to kill..

acehole

[Howard]

Good afternoon gentlemen. I've just worn out my last set of A048 running at 24psi and as they are expensive I'm trying out some Nankang 225/45R17 NS 2R semi slick in the soft compound - now don't laugh - they are pretty new to this country but are sold as a track day tyre http://www.nankangtyres.com.au/tyre59/ns-2r.php , they seem quite noisy cruising and stiff when cold, light up easily at pull off but when warm quite impressive and at £84.00 plus VAT fitted per unit worth a go. I just hope they have a couple of thousand miles in them as I'm across Europe in a week or two.

[R.I.B.]

Toyo 888's have come down in price too! Russ was telling me it's because of the Avon ZZR's that LOTrdc are running was cheaper. Reading the LOT newsletter about the LOTrdc they say they've broken all the lap records previously set on the A048s.

[Meister]

Guys

I don't want to kick the life out of this tyre pressure question but... checked the handbook for the Protenza and that's 26 F and 27.5 R and as I said earlier the book pressure for AD07 is 26F and 29 R.

 

My question is why have Lotus suggested these higher psi figures bearing in mind all the R&D they must have carried out with the tyre companies?

Do you think it's just the fact you would get better mpg?

Mark

[R.I.B.]

My hand book says 26psi and 29psi on my 2005 elise and that's before they even started to put ad07s on them.

 

My guess would be that Lotus have to consider all possibilities for advising tyre pressures. e.g. There's massive changes in weather conditions over the year in the UK and Europe, getting better MPG, fully loaded car, 2up with full tank and luggage etc etc.

 

The lower the tyre pressure, the harder they work and the more temperature they generate (sounds backwards but apparently that's how it works) so maybe sat at top speed fully loaded comes in to it too?