66 replies to this topic

[SteveA]

I noticed a significant reduction in grip going from A048's to AD08's, around a 33% reduction. AD's are a great road tyre and a good track tyre where A0's are the other way round. ETA - My 245 AD08's don't rub on chassis or clam but I have some small spacers.

Edited by SteveA, 08 August 2012 - 07:08 PM.

[Nev]

KUMHO V70A =£640 (whats putting me off these is lee has these fitted to his vx and they have rubbed slightly on the rear)

Hi Haggi,

Which part rubbed? If it was the bodywork/clam, then you can shift the clam abou a bit usually and/or grind a bit of it away on the inside. If its the chassis (ie the inside edges), then you can buy hub spacers that can push the wheel outwards, these are relatively cheap and can be machined down to any thinkness for precission fitting.



2 points of advice would be (particularily as you have a powerful VX) to:

i) buy the best rubber and not think about price. Everything goes through the tyres :- braking, accelerating and cornering.
ii) Buy a road tyre for the road if thats your main use, only go to R888s or A048s when you wil principly be using the car on the track, otherwise you will struggle to get them up to temps on the road and they will vary in grip a lot more depending on hot/mild/cold days.

It was the inside on the chassis/ tub that i could see the tyres had rubbed slightly on hard cornering. Would it not catch on the clam if i got a couple mm spacer fitted.
I am aiming to do a couple of track days a year and the rest is fast road driving, so i was aiming more towards the AD08S for that reason. What would you recommend?

Hi Haggi,

I can't really offer much advice as I have only used R888s and V70a tyres, whereas others have used many different types. All I can say is that the R888s were fantastically grippy when HOT (ie 50 degrees C), however getting that temp into them on the road is almost impossible unless you are constantly cornering on a warm day or belting along in a straight line at top speed. I choose to "drop down" to the V70a on recommendation from various people in the know and am glad I have. They are far easier to warm up, and when cold/cool they offer more grip than the R888s did at the same temp.

[2-20]

I don't think AD08 is comparable to a V70A. A048 and R888 are much more comparable.

BFOD

A V70A is a true 'semi slick' racing tyre, the AD08 is a 'fast' road tyre & totally different!

Absolutely.

The Kumho tyre equivalent to the AD08 is the Ecsta XS also called KU36 (and it is cheaper than the AD08)

[MrSimba]

You really see the difference between a V70A & AD08 here!

[haggi961]

I noticed a significant reduction in grip going from A048's to AD08's, around a 33% reduction. AD's are a great road tyre and a good track tyre where A0's are the other way round.

ETA - My 245 AD08's don't rub on chassis or clam but I have some small spacers.

I think maybe the AD08s are looking to be the ones so far as its going to be best suited for me. What size spacer on the rear did you have and where abouts did you get it from?

[haggi961]

Absolutely.

The Kumho tyre equivalent to the AD08 is the Ecsta XS also called KU36 (and it is cheaper than the AD08)

Il have a look at those one see what reviews they had.

[haggi961]

You really see the difference between a V70A & AD08 here!

Cheers for the side by side picture and those v70 don't look like they have any tread from new. Also the V70 look a little bit wider then the AD08 so maybe they would have less chance of rubbing.

Edited by haggi961, 09 August 2012 - 12:13 AM.

[SteveA]

What size spacer on the rear did you have and where abouts did you get it from?

I have 1 2mm spacer on the passenger side rear and that does the job. GeorgeBC kindly gave me the spacer at the national but before that I had a 5mm one from halfords which made it rub very slightly on very hard cornering.

[Rosssco]

So many options to go for but my sensible head is telling me 235R and 205F.

I run 205/5016 and 235/45/17 RS-R's on TD1.2's. No rubbing except for a little at the front on the wheel arch at full lock, although my front is relatively low.. Seem to get a decent amount of heat in them in just normal, non-hooning, road driving.

Oh yeah, and they come with 6.5mm tread new (although only 5.3mm on the 225/45/17)

Edited by Rosssco, 09 August 2012 - 08:48 AM.

[siztenboots]

just to be clear the OP needs 17" fronts

[SteveA]

Just to add I have 225 17" RSR fronts on 7.5J ET 23 rims and they don't rub. I did have to modify the sill though.

[Nev]

I have to admit the V70a tyres come with bugger all tread on them.

[GeorgeBC]

I have to admit the V70a tyres come with bugger all tread on them.

And in medium compound on a hot track they really dont last long!

[haggi961]

What size spacer on the rear did you have and where abouts did you get it from?

I have 1 2mm spacer on the passenger side rear and that does the job. GeorgeBC kindly gave me the spacer at the national but before that I had a 5mm one from halfords which made it rub very slightly on very hard cornering.

Sounds good, so do you reckon if i get 245/ 215 AD08S with 2mm spacers on the rear and the arch cut outs on the front i wont get any rubbing. Im also just slightly lower on the ride hight then what standard is.

[haggi961]

I have to admit the V70a tyres come with bugger all tread on them.

And in medium compound on a hot track they really dont last long!

This is what is putting me off them with the low tread from new and not lasting very long.

[GeorgeBC]

Dont forget to reroute or cable tie out of the way the handbrake cable or the wider wheels will rub it. Definitely keep an eye on the adjustment knob at the top of the shocks as its super close!

[rob999]

Do you know if this effects the 235 as well George or just the 245s?

[techieboy]

If 80% of your driving is on the road any semi-slick is a waste and the AD08 or R1R is probably a better choice. You'll not get the benefit of semi-slicks but, you'll have all of the drawbacks of cost, fast wear rates and lack of tread. More road friendly tyres won't look as blingtastic though.

[GeorgeBC]

Everyones cars are slightly different then everyone has different ride heights and geos. I have no experience of 235 tyres only what i have seen on others cars but i would imagine on my setup they would be fine. Some shocks dont have the djustment knobs at the top so would be fine. I think you need to way up whether the benefits outweigh the negatives. Haggi has said he only plans on doing a couple of trackdays a year so for me the negatives well outweigh the positives when the car is going to be mainly used on the road.

[GeorgeBC]

Dont forget about tramlining either. My car is all over the place on the road.