VH2 Vantage tyres

[yeti]

Talking tyres in one of the Facebook groups which lead me to 'AI mode' on Google.

My car has almost new Michelin PS4 235/40 and 275/35, no complaints.

AI claims

"Many drivers choose to run the slightly wider 245/40 (front) and 285/35 (rear) sizes on the original 19-inch alloys for a more aggressive stance and improved grip."

Is this a thing on 2010 Sports Pack wheels, i.e these ones? I'm a couple of years off replacing them but always worth having extra rubber on the road.

[LTP]

The 245 and 285 combination, introduced on the 'S' and other sporty variants, then standardised across the range at 12.25MY, was accompanied with an increase of rear wheel width from 9.5" to 10"; the fronts remained unchanged at 8.5"

Images below are taken from an old Continental technical data document, but it'll still be largely applicable across all makes.


No problems with fronts



This shows that you can put 285/35 ZR19 on a 9.5" rim, but the recommended ETRTO fitment would be to use a 10"


And the headings for the columns, plus the ETRTO statement


As for AI "claims"? if an over-promoted, glorified autocomplete told me that tyres were black and round, I'd want to check.

[XMark]

Incase you were wondering what a 245 looks like on an 8.5” wheel…….looks good to me and not at all out of place

[yeti]

Thanks for that LTP.

Can doesn’t always mean should of course and I’ve no intention of changing my perfectly good wheels. So I guess I’ll see how things sit when the time comes.

[Gassmi]

yeti said:

Talking tyres in one of the Facebook groups which lead me to 'AI mode' on Google.

My car has almost new Michelin PS4 235/40 and 275/35, no complaints.

AI claims

"Many drivers choose to run the slightly wider 245/40 (front) and 285/35 (rear) sizes on the original 19-inch alloys for a more aggressive stance and improved grip."

Is this a thing on 2010 Sports Pack wheels, i.e these ones? I'm a couple of years off replacing them but always worth having extra rubber on the road.

Yeah it's a thing but not on those wheels. Your 2010 Sports Pack rims are 9J front and 10J rear. 245 on a 9J is fine, 285 on a 10J is fine too. People do it.

But honestly you won't notice the difference on the road. PS4 in stock sizes already grips like mad on a Vantage. Going wider just adds cost, makes tramlining worse, and messes with speedo slightly. Stick with what works unless you're tracking it hard. The AI answer isn't wrong but it's forum willy waving not real world gain.

[yeti]

Ta for that. I assumed my rears were 9.5".

Must admit, the 275 Michelins have tons of grip and the speedo reads precisely the Waze speed.

[LTP]

Gassmi said:

Yeah it's a thing but not on those wheels. Your 2010 Sports Pack rims are 9J front ...

<snip>

I think you'll find the fronts are 8.5"J

[Handyman2009]

I ran 245 and 285 on stock 2009 Sportspack wheels for years before aquiring my HRE P101 which are 9.5 front and 11 rear, now I run 265 front and 305 rear

[Emilio Largo]

Gassmi said:

Your 2010 Sports Pack rims are 9J front and 10J rear.

No, they are not. They are - with almost certainty - 8.5J front and 9.5J rear. Haven´t you read or understood LTP´s correct breakdown?

[Import]

Have 20 HRE on mine 9 front 11 rear

Edited by Import on Sunday 31st May 18:20