MSA Class 1a & b tyres

[Matt Wills]

Hi all

Any details of the class 1a & 1b tyres eligible for 2010?

I am looking to race in the Classic Tin Tops series in a Saxo VTS running 195/50/15's so any recommendations?

Thanks,

Matt.

[Shaun_E]

Here you go:
http://www.msauk.org/uploadedfiles/msa_forms/blueb...

[andy97]

Do you meen the Classic Sports Car Club's (CSCC) "Tin Tops" series?

If so most seem to use Yokohama A0048s or Toyo 888s

[davspeed]

CSCC have the Adams and Page service truck at most meetings and they supply and fit yokohama and toyo tyres at prices you will find hard to beat. (no connection just satisfied customer)

[Graham]

I've run list 1b's on the tas and the tuscan..

the first were kumho's and they are best used as part of the tyre wall in my experience.. the Dunlops ( doj1 doj2 IIRC) were like night and day to the kumho... crap in standing water but otherwise great if you can get them in the right size.. If i ever get the chim back dunlop list 1b's are going on it for the summer.

We did some testing on soft toyo's and they weren't far off the slick pace.. but lasted soooo much more

G

[Trev450]

I've used Toyo 888's and Yokohama 048's. The Toyo's are better for sprints, hill climbs, etc as thet warm up more quickly, but the 048's are harder and therefore better for repeated lapping. Both however are useless in standing water.

[Graham]

Trev450 said:

Both however are useless in standing water.

To be fair I think any list 1b tyre is going to be hopless in standing water. Do the CSCC allow a wet tyre as well, or is that what the list 1a is for as they are more road biased an work in the wet.

[Trev450]

Graham said:

Trev450 said:

Both however are useless in standing water.

To be fair I think any list 1b tyre is going to be hopless in standing water. Do the CSCC allow a wet tyre as well, or is that what the list 1a is for as they are more road biased an work in the wet.

I'm not familiar with the specific regs for CSCC, but I use List 1A tyres for MSA sprints when 'wets' are required.

[frodo_monkey]

Graham said:

Trev450 said:

Both however are useless in standing water.

To be fair I think any list 1b tyre is going to be hopless in standing water. Do the CSCC allow a wet tyre as well, or is that what the list 1a is for as they are more road biased an work in the wet.

Get more grooves cut into your '48s or 888's by Polleys?

[Graham]

frodo_monkey said:

Graham said:

Trev450 said:

Both however are useless in standing water.

To be fair I think any list 1b tyre is going to be hopless in standing water. Do the CSCC allow a wet tyre as well, or is that what the list 1a is for as they are more road biased an work in the wet.

Get more grooves cut into your '48s or 888's by Polleys?

I didn't think you were allowed to modify a list 1a or list 1b tyre, wouldnt it loose it homolagation then ? Depends on the championship regs I suppose.

[Redlake27]

The new Dunlop Direzza DZ03 is now available. I use these on my racer.

http://www.mrtyremotorsport.co.uk/product.asp?id=1...

[andy97]

Graham said:

Trev450 said:

Both however are useless in standing water.

To be fair I think any list 1b tyre is going to be hopless in standing water. Do the CSCC allow a wet tyre as well, or is that what the list 1a is for as they are more road biased an work in the wet.

You can use whatever tyre you want as long as its in List 1a or 1b. Not sure that anybody has "wets", most just seem to use the same tyres and try to get on with it!

I did read somewhere that Avon CR28s were the List 1B tyre of choice in the wet but I'm not sure how much they are or whether they are still made.

[andy97]

Graham said:

frodo_monkey said:

Graham said:

Trev450 said:

Both however are useless in standing water.

To be fair I think any list 1b tyre is going to be hopless in standing water. Do the CSCC allow a wet tyre as well, or is that what the list 1a is for as they are more road biased an work in the wet.

Get more grooves cut into your '48s or 888's by Polleys?

I didn't think you were allowed to modify a list 1a or list 1b tyre, wouldnt it loose it homolagation then ? Depends on the championship regs I suppose.

I don't remeber seeing anything in the Blue Book about not being able to cut extra grooves in to List 1b tyres.

Certainly Polley will do it if you ask them, & CSCC has no specific regs on this point. Tyres just have to be List 1a or List 1b.

[andy97]

I have checked. Tyres are NOT allowed to be modified in CSCC races.

[NJH]

Graham said:

I've run list 1b's on the tas and the tuscan..

the first were kumho's and they are best used as part of the tyre wall in my experience.. the Dunlops ( doj1 doj2 IIRC) were like night and day to the kumho
G

Was that the V70a? I was planning on getting some in the 225x50-16/245x45-16 size for my 944 S2. I remember chatting to a guy a couple of years back that had switched from the kuhmo to the Dunlops as everyone kept telling him how awesome the Dunlops where, he reckoned he was getting better times on the kuhmo but would probably get more out of the Dunlops with a different suspension setup.

[Graham]

NJH said:

Graham said:

I've run list 1b's on the tas and the tuscan..

the first were kumho's and they are best used as part of the tyre wall in my experience.. the Dunlops ( doj1 doj2 IIRC) were like night and day to the kumho
G

Was that the V70a? I was planning on getting some in the 225x50-16/245x45-16 size for my 944 S2. I remember chatting to a guy a couple of years back that had switched from the kuhmo to the Dunlops as everyone kept telling him how awesome the Dunlops where, he reckoned he was getting better times on the kuhmo but would probably get more out of the Dunlops with a different suspension setup.

I thought it was v700 225/45 r15 but could well be v70 its a while ago we ran them. If i get out into the shed I'll have a look. iirc we ran a fairly hard compound ( same as the Kumho bmw's were using). The main issue was that they wouldnt take many heat cycles i.e about 6, and after that they were hard as nails. they also had a very short sweet spot time... Testing at the old anglesey pushing hard straight out of the pit lane on cold tyres you had 4 laps to get a time in before they went off. That was on the tasmin, circa 1150 with driver and about 150 bhp. The problem may have been down to the compound as the bmw's were heavier. with a softer compound they may have worked better..

in my case bolting a set of do1j's onto the taz made a big difference, and they were usable a lot longer.

[NJH]

Thanks Graham, very interesting. Have heard exactly the same thing with Hankooks.

[Graham]

Sadly I think the only real answer is probably to try the different tyres yourself, and see what works best for your driving style, your car and your pocket !!!