P Zero front, Cup 2 rear on a 981 Spyder for the track?

[W12JFD]

As per title - any harm in mixing brands front to rear? Cheers

[Harris_I]

You are about to get the full spectrum of opinion on this one.

Your car will understeer a little if all 4 tyres are of a similar age and condition. If you can manage the behaviour, then no problem.

[Porsche911R]

Just don't do it.

P zero are a crap track tyre any way, but with a cup 2 on the back it will be a understeering mess, esp as you have no front camber on the Spyder either with a stock oem geo.

you will kill the tyres In a few laps and bend all the tred back and have so much vibration it will shake the car loads.

[Harris_I]

Actually scrap that. I agree with P911R. Cup 2 is very sticky.

[W12JFD]

Yep, always been very happy with cup 2s on other cars but they don't make a 235/35/20 for the front - any other tyre suggestions for track work?

[Fish]

If you are doing track work Don't mix tyres... Have the same front and rear! I won't mix tyres ever and replace at the appropriate time. Whiel mixed tyres may generate a certain dynamic in one circumstance ie understeer in thabove case it can go horribly wrong in others ie the above case will give you oversteer in the wet!!

[MDL111]

W12JFD said:

Yep, always been very happy with cup 2s on other cars but they don't make a 235/35/20 for the front - any other tyre suggestions for track work?

get a set up OZ Allegerita (or whatever the cheapish light ones are called) in a size that allows you to run the tyres you want?

[W12JFD]

MDL111 said:

get a set up OZ Allegerita (or whatever the cheapish light ones are called) in a size that allows you to run the tyres you want?

It's a possibility - any significant drop in performance moving from 20 to 19 fronts?

[Porsche911R]

you could keep the same tyre drop the wheel to 19" and in theory have shorter ratio's ;-) (19" all round though)

or upsize tyres to 245/275 for track on the Spyder

or go oem size on Pilot SS and have the best road tyre which can do a few track days also, but get the top mounts adjusted for max camber.

many options

[Steve Rance]

Absolutely do not do it. It will ruin the handling balance of your car and as you up your pace will be outright dangerous.

[W12JFD]

Helpful comments - Any deterioration in ultimate grip by dropping fronts to 19 and keeping same width?

[BubblesNW]

If I remember correctly your Spyder has ceramics, if so I suspect nothing short of 20 wheels will fit over the discs.

[W12JFD]

BubblesNW said:

If I remember correctly your Spyder has ceramics, if so I suspect nothing short of 20 wheels will fit over the discs.

Went for steels due to bias toward track use and there seems to be room to drop down (incidentally steel braking performance is exemplary)

[BubblesNW]

W12JFD said:

BubblesNW said:

If I remember correctly your Spyder has ceramics, if so I suspect nothing short of 20 wheels will fit over the discs.

Went for steels due to bias toward track use and there seems to be room to drop down (incidentally steel braking performance is exemplary)

I stand corrected (thanks to the insoles) and have experienced your Boxster at Oulton when you also had the Lotus in attendance. Yes, the steel brakes work fine.

[W12JFD]

BubblesNW said:

I stand corrected (thanks to the insoles) and have experienced your Boxster at Oulton when you also had the Lotus in attendance. Yes, the steel brakes work fine.

Cheers Bubbles - Lotus 211 semi retired at the moment as Spyder is much more fun in the rain!!