Help - tyres (again)
Discussion
I'm really puzzled by this whole tyre thing. Problem: I need new rear tyres.
Wheels: Mk1 GT3 10x18s.
On the front, I'm running PZero System Corsas (Direczionales) in a slightly oversized 235/40-18. After 1 day at Oulton, these are still doing fine - I was impressed how they gripped like a leech to steak, while they also helped me plough through the torrential downpours on the way to Castle Combe today.
I'm hesitant to go to the matching System Corsas (Assimetricos) on the rear as they only come in 295/30-18s and based on the grip offered up by the front tyres, I suspect that the 295 Corsas may make the car feel "over-tyred". The other problem is that I believe these will fit on the 10" rims, but it will not be optimal as the tyres fit ideally on either 10.5 or 11" rims.
I would ideally like to stick to the 285 width tyres... but NOT ROSSOs. I was really disheartened by them as they went completely off after the 4/5th lap at Oulton. Sliding around like a wet fish, they definitely are NOT a match for the sticky Corsas on the front.
So what are my options for a tyre which offers more grip than the Rossos, and are a suitable match for the Corsas without making the car feel over-tyred?
I was thinking of switching to the Pzero System Assimetricos on the rear which are available in 285 as these tyres are stickier than the Rossos... or do I go with Corsa Rs (same compound as System Corsas, but not as much wet weather assurance - but avail in 285)? Alternatively, how about Toyo R888s? Met someone running them at Castle Combe earlier today who gave them the thumbs up... Switch to Bridgestone S02As all round?... will these hold up on track or melt like the Rossos? Or should I just go for the matching System Corsas in 295 on the rear?
Advice welcomed...
Cheers -
>> Edited by polarexpress on Sunday 2nd April 01:42
Wheels: Mk1 GT3 10x18s.
On the front, I'm running PZero System Corsas (Direczionales) in a slightly oversized 235/40-18. After 1 day at Oulton, these are still doing fine - I was impressed how they gripped like a leech to steak, while they also helped me plough through the torrential downpours on the way to Castle Combe today.
I'm hesitant to go to the matching System Corsas (Assimetricos) on the rear as they only come in 295/30-18s and based on the grip offered up by the front tyres, I suspect that the 295 Corsas may make the car feel "over-tyred". The other problem is that I believe these will fit on the 10" rims, but it will not be optimal as the tyres fit ideally on either 10.5 or 11" rims.
I would ideally like to stick to the 285 width tyres... but NOT ROSSOs. I was really disheartened by them as they went completely off after the 4/5th lap at Oulton. Sliding around like a wet fish, they definitely are NOT a match for the sticky Corsas on the front.
So what are my options for a tyre which offers more grip than the Rossos, and are a suitable match for the Corsas without making the car feel over-tyred?
I was thinking of switching to the Pzero System Assimetricos on the rear which are available in 285 as these tyres are stickier than the Rossos... or do I go with Corsa Rs (same compound as System Corsas, but not as much wet weather assurance - but avail in 285)? Alternatively, how about Toyo R888s? Met someone running them at Castle Combe earlier today who gave them the thumbs up... Switch to Bridgestone S02As all round?... will these hold up on track or melt like the Rossos? Or should I just go for the matching System Corsas in 295 on the rear?
Advice welcomed...
Cheers -
>> Edited by polarexpress on Sunday 2nd April 01:42
polarexpress said:
I'm really puzzled by this whole tyre thing. Problem: I need new rear tyres.
Wheels: Mk1 GT3 10x18s.
On the front, I'm running PZero System Corsas (Direczionales) in a slightly oversized 235/40-18. After 1 day at Oulton, these are still doing fine - I was impressed how they gripped like a leech to steak, while they also helped me plough through the torrential downpours on the way to Castle Combe today.
I'm hesitant to go to the matching System Corsas (Assimetricos) on the rear as they only come in 295/30-18s and based on the grip offered up by the front tyres, I suspect that the 295 Corsas may make the car feel "over-tyred". The other problem is that I believe these will fit on the 10" rims, but it will not be optimal as the tyres fit ideally on either 10.5 or 11" rims.
I would ideally like to stick to the 285 width tyres... but NOT ROSSOs. I was really disheartened by them as they went completely off after the 4/5th lap at Oulton. Sliding around like a wet fish, they definitely are NOT a match for the sticky Corsas on the front.
So what are my options for a tyre which offers more grip than the Rossos, and are a suitable match for the Corsas without making the car feel over-tyred?
I was thinking of switching to the Pzero System Assimetricos on the rear which are available in 285 as these tyres are stickier than the Rossos... or do I go with Corsa Rs (same compound as System Corsas, but not as much wet weather assurance - but avail in 285)? Alternatively, how about Toyo R888s? Met someone running them at Castle Combe earlier today who gave them the thumbs up... Switch to Bridgestone S02As all round?... will these hold up on track or melt like the Rossos? Or should I just go for the matching System Corsas in 295 on the rear?
Advice welcomed...
Cheers -
>> Edited by polarexpress on Sunday 2nd April 01:42
I am running rosso's as my standard road tyres...I am seriously unimpressed...with Dunlop SSRS on my track rims....Good but not incredible.
The toyo r888 is just about to be released in the 285 size...and looking at the price of the front 225/235s , (elite direct quoted me £140ish) , we may have a replacement for the great value but deceased Dunlop SSRs....however I have heard that they are not a wet tyre.
Go for matching 295's P Corsa and fine tune your handling from there with the sway bars. You HAVE to have a similar tyre on the rear to keep the car's handling the same on all conditions, dry/wet/cold,etc). The extra wide tyres in the front will give you the edge in terms of grip but if you feel its not enough, stiff your rear sway bar one hole and get a more agressive wheel alignment (go to JZ Machtech or Parr) with a slight increase of negative camber in the front to take full advantage (and better wear)out of your corsas and if its still not right for you go one hole stiffer but beware that you MUST have some understeer in some situations on a 911 (such as accelerating too soon out of a turn as the front lifts up and the tyres lose traction)and very high speed turns... the reason I refer this is that if you dial out ALL understeer the car will become dangerous both on the road and track. Bottomline is get 295 Corsas, dial out 90% of your understeer and drive the car differently (trail braking, etc) to get the rest of the 10% off.
Concerned to hear that the toyos aren't a wet tyre - the SSRs i use now are not the best track tyre but are great for the price and are okay in the wet. Although i have a spare set of wheels, i'm too lazy to swap over so use the SSRs on road too.
I'd be interested to hear of more experience on the Toyos.
Adrien - you might also consider the Kumho V70As - but they're more track focused i think.
FWIW the S02s are a good road tyre (i had them on my 993) - but you won't like them on trackdays.
Ajit
I'd be interested to hear of more experience on the Toyos.
Adrien - you might also consider the Kumho V70As - but they're more track focused i think.
FWIW the S02s are a good road tyre (i had them on my 993) - but you won't like them on trackdays.
Ajit
singh911 said:
Concerned to hear that the toyos aren't a wet tyre - the SSRs i use now are not the best track tyre but are great for the price and are okay in the wet. Although i have a spare set of wheels, i'm too lazy to swap over so use the SSRs on road too.
I'd be interested to hear of more experience on the Toyos.
Adrien - you might also consider the Kumho V70As - but they're more track focused i think.
FWIW the S02s are a good road tyre (i had them on my 993) - but you won't like them on trackdays.
Ajit
ajit,
with regards to the R888 being a poor wet tyre,
this is only what i hear from reading forums based on reviews from other cars (Subaru, and integra).. I dont think many 911 owners will have used the Toyo R888s yet, as they have not been available in the 285 size..until very soon hopefully.
Kuhmos get great reviews on US track forums, (i had a set on a Honda Integra...and they are awesome, but they start with onyl about 5mm of tread, and really dont last long). You can get them fairly cheap from Protyre who will do a 225/285 set for about £750.
Tif
kiko said:
Go for matching 295's P Corsa and fine tune your handling from there with the sway bars. You HAVE to have a similar tyre on the rear to keep the car's handling the same on all conditions, dry/wet/cold,etc). The extra wide tyres in the front will give you the edge in terms of grip but if you feel its not enough, stiff your rear sway bar one hole and get a more agressive wheel alignment (go to JZ Machtech or Parr) with a slight increase of negative camber in the front to take full advantage (and better wear)out of your corsas and if its still not right for you go one hole stiffer but beware that you MUST have some understeer in some situations on a 911 (such as accelerating too soon out of a turn as the front lifts up and the tyres lose traction)and very high speed turns... the reason I refer this is that if you dial out ALL understeer the car will become dangerous both on the road and track. Bottomline is get 295 Corsas, dial out 90% of your understeer and drive the car differently (trail braking, etc) to get the rest of the 10% off.
My car's been setup by JZM and I'm very happy with their setup (track setup, road tyres). I'm very happy with the car's balance with the 235 front, but the problem is purely down to the rear tyres lack of grip.
PeterPeter - it's good to know that I'm not the only one who doesn't rate the Rossos... they really are a poor tyre when compared to the N3 System Assimetricos (I hear these are being phased out).
A posting on Titanic recently suggested a full set of 225/285 Toyo R888s were <£600. This seems a bargain for the drier summer days... is anyone here willing to take the plunge and tell of it's wet weather abilities?...
polarexpress said:
Go for matching 295's P Corsa and fine tune your handling from there with the sway bars. You HAVE to have a similar tyre on the rear to keep the car's handling the same on all conditions, dry/wet/cold,etc). The extra wide tyres in the front will give you the edge in terms of grip but if you feel its not enough, stiff your rear sway bar one hole and get a more agressive wheel alignment (go to JZ Machtech or Parr) with a slight increase of negative camber in the front to take full advantage (and better wear)out of your corsas and if its still not right for you go one hole stiffer but beware that you MUST have some understeer in some situations on a 911 (such as accelerating too soon out of a turn as the front lifts up and the tyres lose traction)and very high speed turns... the reason I refer this is that if you dial out ALL understeer the car will become dangerous both on the road and track. Bottomline is get 295 Corsas, dial out 90% of your understeer and drive the car differently (trail braking, etc) to get the rest of the 10% off.
My car's been setup by JZM and I'm very happy with their setup (track setup, road tyres). I'm very happy with the car's balance with the 235 front, but the problem is purely down to the rear tyres lack of grip.
PeterPeter - it's good to know that I'm not the only one who doesn't rate the Rossos... they really are a poor tyre when compared to the N3 System Assimetricos (I hear these are being phased out).
A posting on Titanic recently suggested a full set of 225/285 Toyo R888s were <£600. This seems a bargain for the drier summer days... is anyone here willing to take the plunge and tell of it's wet weather abilities?...
did the post actually say these were available now?? because I was told by elite direct.com that they would be out in the next couple of weeks.??the 265s are available now.
polarexpress said:
Erm... I assumed so? Dave quoted the price when asked for 225 and 285, and he didn't say anything about them not being available yet...
adrien,
looks like you were right..the R888s are in now.
I have just ordered a set and I am having them fitted on Friday with a view to using them at spa on monday. not sure on total price yet, but expecting sub 750 fitted.
Tif
singh911 said:
Adrien - you might also consider the Kumho V70As - but they're more track focused i think.
Ajit
Burzel reckons these Kumho's are too soft for GT3's to the extent that even the hard compound will actually cost you more per mile than the MPSC's.
I've got some DZ02G's to try - compromised sizes - 235's & 265's
Having had these on the Carrera 3.2 CS I know they are more of a dry weather only tyre & I expect them to be very noisy, but they are grippy & as long as the weight / power of the GT3 doesn't overwhelm them they should be pretty good.
If the forecast looks good for Spa, I'll report on them after that. If it looks iffy, I'll be on SSR's.
Gassing Station | Porsche General | Top of Page | What's New | My Stuff