Road legal track tyres

[Cerberus]

Does anyone use R888's or have any comparisons with these against other makes (avon-yoko's-etc):?: i have used T-1S Toyo's on both of my TVR's and was happy with them for road use, but i would like something stickier for the RT

Phil

[stylussprinter]

YOKO A021R , AO32R , AO48R road legal and the A021R is a good wet/dry
AVON ACB10 (CROSSPLY) , AVON CR500 and the CR500 is a good wet/dry also both road legal
TOYO T1S , TOYO R888 both road legal

I've used all but the AVON's . Tim gets good traction even in wet conditions with the CR500's and can supply. I currently use R888's but may change this year. They all have different charactoristics in the way they grip so it depends on your driving style. R888's rely more on ' wall ' construction than soft compound and opperate best between 120 and 200 degrees.(quite hard to reach that temp')YOKO's run best cooler than that.

They're all better than road tyres -- list1A but have they limits when damp/wet.
Rob.

[kevp]

Found This information. It is for Caterham 7s, so perhaps its relavent to us.


Tyres Types For Sevens
There are a wide range of tyres commonly used on sevens. Wheel size should also be considered, larger wheels may look sexier but ride quality and handling both benefit from smaller wheels. 205/45R16 are therefore purely for looks, 195/55R15 are sometimes used as they are the smallest size that Potenzas can be found in - see below. 185/60R14 is perhaps the best size as it still has the same ground clearance as 15" and 16" due to its 60 profile. 13"/60 are best but give an inch or so less clearance, ACB10s and CR500s can only be found in this size. In rough order of descending dry grip:


Avon ACB10


These tyres are the same as used on Formula Ford race cars although there are 15 different compounds. The usual one for sevens, and indeed standard equipment on SLRs, is the A30 compound that gives about 3000 road miles on the rear and 2 or 3 times more on the front. An abrasive track session can wear them out in a day though. The are of rubber and glassfibre construction and so are exceptionally light, they do however require very different camber settings compared to normal tyres. They provide little grip in the wet and are very susceptible to aquaplaning. They cost around 100 quid a corner. More details at the Avon website .


Yokohama A032R


The 32 is the standard tyre for the discerning road sevener (When my 21s wear out I'm going to get some). They provide levels of grip approaching the ACB10 but are of conventional construction and so require no special set up but are much heavier. They also give similar levels of wear. They are rumoured to be a bit sharp on the limit compared to a 21R. They are around 75 quid a corner from George Polley Motorsport for 14"


Yokohama A038R


This was developed for the Lotus 340R Elise derivative. I believe it to be similar to a 32R in performance and it has a similar tread pattern.


Avon CR500
This was developed specifically for the Superlight R500. It is a conventional construction tyre that offers reasonable dry grip but reports from other sevens seem to suggest its wet grip is as good as a 21R in the dry. It has a tread pattern designed to shift water. Very expensive in the region of 125 quid. More details at the Avon website .


Yokohama A021R
The 21 has a conventional tread pattern but softer rubber than a normal tyre. This gives it much improved grip in the wet (unless very wet) and dry and 6000 miles per rear. They offer very progressive on the limit behaviour allowing a novice (me ) to hold huge slip angles with ease. George Polley do them for around 50 quid a corner. A very popular choice - I have them at the moment.


Bridgestone Potenza
This is an interesting case. Many championships only allow "List 1A" tyres as defined in the RAC blue book. This is to ensure only standard road tyres are used to keep costs down. However, the Potenza has a layer of softer rubber under the surface designed to ensure grip even on old tyres that have hardened somewhat. Thus many racers buy these and scuff them down to this soft layer. The problem is that they are only available in 15" so everybody had to buy new wheels to be competitive...


Michelin Pilot SX
Standard equipment on older Caterham dedion models. An unremarkable road tyre - my old ones are destined for the cavalier. 80 quid or so from any tyre dealer - don't do it, buy something from the list above


Avon ZZ1


The new standard equipment for all Caterhams (except SL/SLR/SLR500) this is very hard and is chosen to ensure that the scholarship race series drivers don't ever have to replace their types to keep costs down. Some people have apparently done two complete seasons of racing on the same set of tyres.


Michelin "Hard as rock"
Standard on Xflow Caterhams, most people give up trying to wear them out, 40,000 miles is nowhere near long enough...

[Cerberus]

Thanks for that chaps, budget won't allow for Avons at £120ish per corner, Toyo's i was happy with their road tyres so i will give them a go at £280 ish for a set it seems quite reasonable.

Phil

[stylussprinter]

Is that R888 or T1S Rob.

[Cerberus]

Is that R888 or T1S Rob.

R888's Rob, 195-55-15 and it's £283.00


Phil

[stylussprinter]

Is that R888 or T1S Rob.

R888's Rob, 195-50-15 and it's £283.00


Phil

That's bloody cheap Phil' Ask for a 205 or 215 price I paid £104 / wheel fitted

Rob

[Cerberus]

Is that R888 or T1S Rob.

R888's Rob, 195-55-15 and it's £283.00


Phil

That's bloody cheap Phil' Ask for a 205 or 215 price I paid £104 / wheel fitted

Rob

Rob, 205-50-15 are £310.00

Phil

[Cerberus]

R888's 195 50 15 i've found them for wait for it £269.99 for a set of four

Phil

[stylussprinter]

A very good deal Phil. Just spoken to tim on his mobile and he's tried to contact you

[Cerberus]

A very good deal Phil. Just spoken to tim on his mobile and he's tried to contact you

Thanks Rob, i will call him tomorrow, if he hasn't posted them yet i will go and collect them if i can and see if i can have a go in the Orange car , everybody else has so i would like to

Phil


PS Rob, do you have a special red phone to call Tim on: LOL

[gnalist]

I think it's more like the sign the Chief of Gotham uses to signal Batman, only it has the SSC in the middle instead of a bat!

[stylussprinter]

Well it's probably that I have more time than the rest of you to keep trying all his numbers through the day .Then he gets pissed off finding my voice on all his answerphones
Rob.

[Cerberus]

They can't get any cheaper or can they £249 for 195 50 15 at that price i'm going to buy a set.

Phil