Size of tyres for a V8Vantage 4.3L

[Jedi4727]

Hi everyone,

My V8 has the 10 spoke "spider" OEM alloys, Front 8.5"x19" ans Rear 9.5"x19"
Current tyres are Front 235x40x19 and Rear 275x35x19
Could anyone advise on whether I can fit Front 245x40x19 and Rear 285x35x19 on my current alloys
I hear various contradictory opinions and would appreciate other Aston drivers views
PS : I'd like to go for the Michelin Super Sport instead og the Potenza
Many thanks for your input

[yvr]

I put F 245x40x19 and R 285x35x19 on my DB9, 8.5/9.5 wheels. No fitting or running problems. The difference in size is quite small.

[Jedi4727]

Hi there,
Thanks for the heads up
But what are the size of your alloys?
My concern is whether or not I can fit 285/35/19 on 9.5x19 alloys ?
Any recommendation ?

[yvr]

My alloys are DB9 15 spoke, front 8.5" x 19", rear 9.5" x 19" (same sizes as yours).

[BingoBob]

Excellent idea for the PSS.

No problem with those sizes. It even says it in the manual:

manual said:

Factory Install
Front Bridgstone RE050 235/40 ZR 19 (92Y)
Rear Bridgstone RE050 275/35 ZR 19 (96Y)

Sport Tire (Dealer Install Option)
Front Pirelli P-Zero Corsa 245/40 ZR19 (98Y) XL
Rear Pirelli P-Zero Corsa 285/35 ZR19 (103Y) XL

However your rolling radius will increase by about 7 or 8mm.

[Jedi4727]

Many thanks guys
BingoBob, you got me lost now about the rolling radius....What do you mean by that ? Or rather what are the consequences ?
I'm thinking or slightly lowering the car and fitting those new Michelin enlarged tyres. Besided a new geometry, will I need to do another thing ?
Thanks for your advice

[GlynV8]

Jedi4727 said:

You got me lost now about the rolling radius....What do you mean by that ? Or rather what are the consequences ?

I think it was meant to say rolling circumference. Have a look at this tyre circumference calculator, it affects your gearing slightly, but possibly more noticeably your speedometer accuracy.
But with your proposed change it is negligible, so not a problem.

Edited by GlynV8 on Sunday 14th October 10:11

[yeti]

GlynV8 said:

Have a look at this tyre circumference calculator, it affects your gearing slightly, but possibly more noticeably your speedometer accuracy.

Dead on! If you have a TomTom or Garmin, check your car's speedo against it afterwards. My digital speedo is PRECISELY accurate with satnav now after fitting DBS wheels and tyres to my DB9. Makes no odds, just good to know. Doubt you'll feel the gearing changes but they will be there...

[Jedi4727]

Superb. Very useful tool and explanations
In France, we have what we call the "controle technique" ie technical control, every two years. And they do check all theses things. If the car doesn't pass the test, no sticker....and you can't drive it until you've sorted out the issue. Is it the same thing in the UK ?
So I'm just taking all the precautions ahead of the purchase
Thanks to all of you for the input

[BingoBob]

Since the manual mentions that the sizes you want are valid, then I can't see it being a problem.

I will be doing exactly the same as you, Jedi, and I don't anticipate a problem with the CT. The tester would have to be a real knob to fail your car on that. Worst case, I know a friendly tester...

[GlynV8]

I was checking my tyre pressures today and the information label on the door pillar gives pressures for 235/40 R19 & 275/35 R19 as well as 245/40 R19 & 285/35 R19. So in that is put there by the factory, one can assume thatyou will be just fine

[Jedi4727]

Thanks guys.
For what it´s worth, and especially for the french users, I checked today with the CT (Technicacl Control - compulsory) and there is no issue on fitting these tyres.
No issue either with its impact on the speedometer (2 km/h error) as we would be within the tolerance margin.
Only need to remember this where approaching radars....

[g55dxb]

Not sure the Michelin PSS is available in those sizes. I used to have the PZero Corsas in that size, but they are no longer available. At present I have Yokohama Advan Sport in that size on my 2006 V8 Vantage and have been quite happy with them. I'm considering alternatives now like the Bridgestone Potenza RE-11 (live in Dubai, no rain or snow) but need to do a bit more research.

[yeti]

My next shoes will probably be Michelin Pilot Sports - but do they have the same tread depth as the Pirellis? Once I had my exhaust switch ftted, with the roof up... all I can hear is tyre noise!! Very surprising.

Or the MPS more of a 'Corsa' tyre, soft compound, shallow tread, wear-out-soon/hedgefinder-in-the-cold fitting?

[Jedi4727]

Hi Yeti, Michelin have a couple of tyres now for sport cars, amongst which is the new Michelin Super Sport Cup+. At least this is how it´s called over here. Soundwise, it is in the 65db tone, so should be somewhat forgotten vs other tyres which are in the 71 - 73db range. On rainy conditions, a pal who test drove them in Le Mans tells me that versus the Michelin Super Sport (version 3)´ the distance to stop from 150 km/m down to 0 was shorten by 3m. Wheel design reduces a little aquaplanning risk versus the MSS3, but it's not as massive as the reduction in braking distance
Hope that helps

[PUMPMAN1860]

[quote=Jedi4727]Hi Yeti, Michelin have a couple of tyres now for sport cars, amongst which is the new Michelin Super Sport Cup+. At least this is how it´s called over here. Soundwise, it is in the 65db tone, so should be somewhat forgotten vs other tyres which are in the 71 - 73db range. On rainy conditions, a pal who test drove them in Le Mans tells me that versus the Michelin Super Sport (version 3)´ the distance to stop from 150 km/m down to 0 was shorten by 3m. Wheel design reduces a little aquaplanning risk versus the MSS3, but it's not as massive as the reduction in braking distance
Hope that helps[/quote
Very useful gentlemen.... It looks like the nice spare set of refurbished wheels I have will be having some slightly wider Michelin pss'f itted after a rather expensive run out last Sunday.. I was hoping to get another 3000 out of the existing tyres until I noticed this