im about to order front tyres but thinking.shall i widen my

[V8Dom]

ok
lets have a proper discusion

Ive had kumo and they are great but the tram lining on the roads so dangerous

Ted has told me Mitchelin are the way to go and i respect that and appreciate the advise as he knows more than me.

but i dont want to loose front end grip.... i can control the rear with my right foot but front is accident or keep on the road.

so shall i widen my front rims... is there room without lengthening front arms

what will fit and who has tried

Martins Steve Smith car runs an amazing 285 front 888 tyres and there is NO tram lining at all, i know as ive been in it many times

thanks guys

dom

yo

[macgtech]

V8Dom said:

ok
lets have a proper discusion

Ive had kumo and they are great but the tram lining on the roads so dangerous

Ted has told me Mitchelin are the way to go and i respect that and appreciate the advise as he knows more than me.

but i dont want to loose front end grip.... i can control the rear with my right foot but front is accident or keep on the road.

so shall i widen my front rims... is there room without lengthening front arms

what will fit and who has tried

Martins Steve Smith car runs an amazing 285 front 888 tyres and there is NO tram lining at all, i know as ive been in it many times

thanks guys

dom

yo

Tramlining is often caused by the tyres and/or poor geometry setup.

You can fit 285's on with 10.5 or 11 inch front rims - a bit of a restriction on the steering lock maybe necessary to stop rub on full lock though.

Jonny

[deadscoob]

Not just poor setup, but if it's setup for track use too?

Mine has quite aggressive geometry and with Kumhos it's exciting on bumpy roads, but that's not because the geometry is poor. Just setup for track.

It's difficult to get the best of both worlds.

If anyone has any ideas how to have the performance and grip you get from kumhos and track biased geometry, and keep it nice on road with good grip I'm all ears.

2 sets of wheels and tyres is not an option, so am interested in responses to Doms post too.

[Storer]

You are asking a lot.

The Khumo's are a very grippy tyre (in the dry and when they are warm).

Going up in width without the lengthened wishbones will restrict lock and add considerable weight to the steering.

Tyre make (and therefore design) will affect tramlining and grip and the Michelins and new Pirellis are better than the Goodyears.
One of the reasons the Khumos are so good on the track is their square edge and flat tread, which is also why they tramline like a bh.

Two sets of wheels and tyres are a good answer. You need the water removal ability of a full road tyre for an unexpected downpour when enjoying those booked trips. On the track you want that 'bite' that a track biased tyre can give.

I should be able to answer a few of your questions early next month when I re-tax my car and test out wheel width combinations to try to eliminate tramlining. My car has been fully aligned using a laser alignment setup so it is down to wheel width and tyres.


Paul

[V8Dom]

be intersted in results guys.. ive tried all geo options, both track and road...camber, caster toe in etc im now so bored of it

it must be the tyres..

mitchelin do some nice track tyres but restricted speed rating the rep has advised not to use them only the ps2

i must be able to get the same level of grip with a wider tyre, the only problem is generating heat into them as the width is wider and loading per square mm smaller


dom

[845ste]

i try in my gtr:
for me also depends by the height of the shoulder of the tyre.

however, more widen tyre and more to worst, and steering very hard and more nervous.

i working with geometry

you have to find a compromise between track / road

gtr is sport car gruppo c......

[deadscoob]

Are PS2s the only half decent road tyre in our sizes? Super sports not available?

Are there any track day tyrea which are almost as grippy as the Kumhos but with better road manners? Presumably as they should all have stiffer sidewalls they'll all be pretty bad?

[F.C.]

deadscoob said:

Are PS2s the only half decent road tyre in our sizes? Super sports not available?

Are there any track day tyrea which are almost as grippy as the Kumhos but with better road manners? Presumably as they should all have stiffer sidewalls they'll all be pretty bad?

Horses for courses, stiffer sidewalls will give a sharper response and be less forgiving in the wet, softer walls will give more compliance and will be a better bet in wet conditions.
There's a lot that can be done with the geo but in the end I have found it's down to personal taste.
I have Pirelli Corsas fitted and find the road manners excellent with (almost) zero tramlining.
Another obvious point is tyre pressures can make a big difference as well.

[Storer]

V8Dom said:

be intersted in results guys.. ive tried all geo options, both track and road...camber, caster toe in etc im now so bored of it

it must be the tyres..

mitchelin do some nice track tyres but restricted speed rating the rep has advised not to use them only the ps2

i must be able to get the same level of grip with a wider tyre, the only problem is generating heat into them as the width is wider and loading per square mm smaller


dom

Dom

The temperature of a road tyre does rise especially if you 'use' the tyre as the tread blocks move around more than a track tyre. The compound will be harder, but if worked will get stickier. However, you can't expect the same level of grip, probably not even with a wider tyre.

For me the loss of some grip in exchange for better road manners is a trade off I will gladly accept.

Paul

BTW. If you are using all the grip of a track tyre on the road then you are "A DRIVING GOD"....... well at least compared to me!!!

[confusionhunter]

Storer said:

BTW. If you are using all the grip of a track tyre on the road then you are "A DRIVING GOD"....... well at least compared to me!!!

and probably breaking many, many, many traffic laws..... or at least one, many times over.... or going sideways a lot .....

[V8Dom]

confusionhunter said:

Storer said:

BTW. If you are using all the grip of a track tyre on the road then you are "A DRIVING GOD"....... well at least compared to me!!!

and probably breaking many, many, many traffic laws..... or at least one, many times over.... or going sideways a lot .....

no comment..:0)

[deadscoob]

I need rears and am debating about going for kumhos again as I'm more likely to do more road miles than track this year. Have been looking at what's available and there are no modern tyres in our rear standard size. The best seems to be a michelin ps2 but even these are old and not as good as the modern equivalents imo.

I'm not one for larger diameter wheels, but going to a 19 rear opens up a few more options, albeit in a 325 width, but I suspect that's not a big compromise compared to the additional weight. But then you have the choice of pilot super sports, and sport cup 2s, probably the 2 best road and track tyres around at the mo.

I think as time goes on its gonna be harder and harder to find decent tyres, in our sizes and they'll go up in price as demand hoes down. So what are the best options? I really don't want to go for a 19 rear, but I also dont want to pay over the odds for an out dated tyre.

Unless anyone knows that a modern tyres going to be available in our sizes?

[T-Rev]

Hi Dom, as you know my car is set up for the track and I'm running Kumho's for road and track - even in the wet! I left the Kunho's on for a drive to Goodwood breakfast club Vee Power Sunday last Nov in biblical torrential showers with out any problems to speak of, so long as you're sensible? Likewise, I've also suffered with serious tram-lining on the roads with the track set up. Some of this is very likely to be down to the roads in the South East which are 'so bad' I now rarely drive on the road. But I found by having the roll bars connected all of the time actually improved the situation, less tram-lining but a more uncomfortable ride - everything is a compromise! I think from memory you have the same roll bars as me, so why not try leaving them connected (medium/front - soft/rear), you might find this helps. My shocks are also set to 10 clicks (25%). I would suggest that by going for wider tyres will only make things worse - not to mention clearance issues and tyre roll on the rim. Best regards, Trevor.

[V8Dom]

hi trevor

ive tried the bars on the road and they are about the same.. they run very very close to the steering arms too which is a worry

what holes doe you run on the bars amatter of interest.. i can only fit nine on the middle holes due to the above.

dom

[T-Rev]

Hi Dom, for some reason I have two mounting options for my front roll bar - possibly to clear the steering arms? My front are set to centre (medium) and rear are set to rear/end (soft), here are some pictures;











You can hopefully just about make out the other front bar mounts (inside of existing mounts-flat bar with threaded holes sit forward a bit) which if used would cause a problem clearing the steering arm when using the front/nearest the bar (hard) setting? I hope that makes sense. Cheers.

[F.C.]

T-Rev said:

Hi Dom, for some reason I have two mounting options for my front roll bar - possibly to clear the steering arms? My front are set to centre (medium) and rear are set to rear/end (soft), here are some pictures;











You can hopefully just about make out the other front bar mounts (inside of existing mounts-flat bar with threaded holes sit forward a bit) which if used would cause a problem clearing the steering arm when using the front/nearest the bar (hard) setting? I hope that makes sense. Cheers.

A banana shaped drop link would cure the problem of steering clearance surley?

[V8Dom]

i think i need longer rose jointed arms... my flat plat with the 3 holes is about 1 cm above steering arms..

too close for comfort

dom