Toyo 888 or ZZSs for class 3?

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Stevecaterham7
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Toyo 888 or ZZSs for class 3?

Apologies for a question which I'm sure is a can of worms, but tried search and was still a bit confused.

Next year will be my first year back in class 3 after a long time out. I'm only looking to learn the ropes again not worry about every 10th in the car yet. 

I've currently got 888s on the car but a chance to buy some wheels with ZZSs on. Should I go with the Avon's for all races (as I gather they're good in the wet as well) or use Toyos in the dry and swap to ZZSs if it's wet.

is there much in it between the 2?

Dobson_justin
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(Almost) Everyone in the class uses ZZS, and it helps keeps a level playing field.  You are right, they are good in wet and dry, so it saves having to carry spare wheels around.

The 888's are on the 1B list so are ok from a regulation perspective but I could not advise on the difference between the two, but I would recommend ZZS. 

Stevecaterham7
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Thanks for the reply. Are there any different compounds of ZZS or are they all the same? Just need to know if I need to check anything on Saturday when I go to look at the wheels and tyres.,,

Dobson_justin
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Good point on compounds. There are two it seems on the Caterham website, but only 1 will be correct for us. One is a softer compound I think - but hopefully someone will come along with some advice on that as I want to know too, before I buy a new set.

Richard Price
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ZZS's are available in a compound (RT7) specifically for race use in wet weather. However, the Avon suggest that the RT7 compound is list 1c rather than the required list 1b for class 3.

There is actually a misprint in the 2021 blue book. It lists "ZZR RT7" in list 1c, and should read "ZZS RT7".

david nelson
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Richard, sorry can you clarify the compound that is OK for class 3. You post has confused me, although it does not take a lot for me to be confused Thanks David

" The Legend" Low flying Oct 2021

 

Richard Price
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David,

The 13" road legal (list 1b) ZZS's are product codes 7718 and 7719  for the 185 and 215 sizes. See here:-https://caterhamparts.co.uk/98-zzs

The EU labels can be seen on the links from the chart at the bottom of this page here :- https://www.avontyres.com/en-gb/tyres/zzs?cartype=motorsport

david nelson
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Richard thanks know understand.

What is the life expectance in competition. Are they a one season tyre or do they continue to give performance?

" The Legend" Low flying Oct 2021

 

Richard Price
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David,

the tyres I used to set a new class record at Loton this year were three and four years old.

The oldest we're still good enough to sell on as legal road tyres!

I bought a new set mid season, but I wouldn't say they are noticeably different in performance to the old set.

 

david nelson
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Richard

Thanks for that. I will be driving to events next year so its good that it looks as if they last. 

" The Legend" Low flying Oct 2021

 

robj
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Hi Steve,

 

I think your suggestion of competitors needing two sets of tyres to be competitive is exactly what most competitors would like to avoid, due to cost (an additional set of wheels an tyres would cost about the same as a season of entry fees) and in addition feeling the need to change suspension setup for different tyres. Currently we have a gentleman’s agreement in Class 3 that we all run on Avon ZZSs. This has leveled the playing field, and in general is well respected.

I, and I believe, several others have suggested changing the regs to read something like:

"For Class 1 and 2 the recommended tyre is YOKO A539, for classes 3 and 4 the recommended tyre is Avon ZZS. To obtain class awards at individual events any MSUK List 1A or List 1B permitted tyre can be used in class 1 and 2, and class 3 and 4 respectively, however, to score championship points the recommended tyres must be used, and the championship scores will be awarded relative to the fastest driver who is using the recommended tyres. "

Note, this does not preclude a newcomer to the dabbling with whatever tyres they have on their car, just if they want to get serious then they would need to buy the recommended tyre. 

The aim is remove the risk of a costly and unnecessary tyre war [which would put off some current and possibly some new competitors] and ensure that the awards decided against PBs and records are not won by a new tyre advantage. 

It would seem unfair given how the championship, Edward Lewis etc. are decided to have a class (or two) where everyone in that class suddenly goes significantly faster due to a tyre change. It would mean great performances in other classes would not stand a chance. For instance if a substantially better list 1A was found then the championship would realistically only be between class 1 and 2, do we want to fall into a situation like that?