As the title really. I'm looking to to use 245/35/18 tyres on the track and was wondering if anybody else was using this size, or even on the road?

My car (narrow track blob sti) has been lowered a fair bit, but the arches have been rolled and will be set up for the track with a decent amount of camber. The wheels I want to use are 18x9 et35 so I know it's going to be close

Cheers

Kev

 

It seems that there is not alot of members who run that size,it should be fine though as long as you can get them to fit without any rubbing,it must be the cost for decent make tires at that size,they would be quite expensive.SJ.

 

That's my concern. I don't mind paying a little bit extra for tyres if they give me the grip and fitment I want, but I'd be highly pissed off if they caught the arches and I couldn't use them

 

Hi there

We run on our wagon 255/40 R17 with 9JX17" without the issue,yes we are raised at back bit ride height,because they started to rub in very tight corners on track or on the road

And about the 245/35 R18,we run Vredestein Ultrac Sessanta 245/40 R18 too on the track on our wagon and we are never have any issue with rubbing as above we are raised bit ride height at back to be just sure

Wagon is bit more narrower than yours STI and you shouldn't have any issue with 245/35 R17 at track with right camber and ride height

Thanks,Jura

 

i run 245 40 18 on my widetrack blob using avon ZZ5 all round. not used them on track yet but r spot on on the road

 

Thanks for the info Jura but, the reason I'm asking if they'll fit is because I want to get the car set to a height I'm happy with looks wise then get it corner weighted and hope it isn't adjusted too much. I obviously don't want to do that then be raising it for a track day.

What was the offset of the wheels you were using with the 245/40/18's?

 

Do you have any pics mate and what are the specs of the wheels?

 

Hi there

Our car has been raised at back I think just one inch which is not so much,I would suspect if car will be slammed or will be very lowered then you will have issue with rubbing mainly at back in corners or when you will be going through the speed bumps/sleeping policeman

You will see how this will be going,but I would suspect you will need adjust them at least bit at back,in our case on wagon we are needed to raise ride height,on saloon/sedan not sure,but I know friend have fitted 245/40 R18 with Rota Grid Drift 9.5JX18 ET38 and he raised at back too one inch,because he have rubbing at back

We run on 245/40 R18 Grid Drift 9.5JX18" with ET38 and XXR 530 8.75X18" ET20

Hope this helps there

Thanks,Jura

 

This is my current ride height. It is the same height all round, the slope on the drive makes the front end look high (Ignore the colour of the wheels, they're getting re-done in actual white)

 

they are the same as on the RB320. I think they are prodrive GT 1. Mine are in gunmetal grey on WR blue car. sorry but havent any pictures yet

 

offset et53 and 8.5x18. mine is running standard suspension also

 

I would say on yours you will need bit raise at rear,maybe inch would help

Here is how it looks previously on our wagon











Sometimes very lowered car on track is not the best idea,we are several times adjusted ride height to find best ride height,please speak with Chevron or other companies which knows track day setup more than those at wheel alignment centers

Thanks,Jura

 

thanks for the pics. I'd rather use a narrower tyre than run it at that height though

I might just buy a set of cheap tyres in the size I want and have a play to see if I could make it work

 

Kev
This is the height the walls should be , give or take a fraction for diff manufacturer's

245/35 - 85.75mm
225/40 - 90 mm
245/40 - 98 mm
235/45 - 105.75 mm
Giving how low you want the car to sit
Suspension may have to be altered freq ,

Regards mic

 

Thanks for that It's the width I'm concerned about though, not the height.
I have a feeling that with a little bit of camber I'll be ok, but we'll see

 

Hi Kev

As I've said,we run 245/40 and 255/40 on the wagon and on the saloon/sedan you shouldn't need to do raise ride height,but you will see how you get on

My friend run 245/40 on his STI and he raised just inch at rear,but he didn't run aggressive camber,he run just -1.3 at back/rear,we run only -1.5 at back/rear,with higher camber at back you should get away with it

Do you know what tyres you want to run on the track days?

On the pictures you will see difference between the AD08R and Vredestein,both are 245/40,but seems AD08R have higher/bigger sidewall than Vredestein

But in yours case you are thinking to run 245/35,please have look on the first picture,there wagon sits on the 245/35 Continental ContiSport

Thanks,Jura

 

I realise different tyres are slightly different sizes/shapes so I need to have a look around to see which will work best for me.
With regards to which tyres I want to use, it depends on ^^^^ and which I can get for reasonable money. I'm not set on any particular make/model

Thanks for the info

Kev