Avon CR6ZZ tyres - Anyone with experience of these?
Discussion
I'm looking to fit a set of Avon CR6ZZ tyres onto the Vixen as a road legal track tyre. They are the only such item available in 185/70 R15 size, so keeping the original (ish) tyre circumference. They're more commonly used by road going Healey's, XK's, MG's & TR's which are also used for track work such as hill climbs.
They are MSA list 1b tyres and are available in a medium & soft compound.
Before getting the cheque book out, it would be good to know if anyone here has experience of, or thoughts about these tyres.
The two main questions on my mind are :
1) which compound to go for - used as road car (2,000 miles / year) April thru October & competing in 6-8 hill climbs / sprints each year
2) how much additional stress on components such as diff, from using much softer compound tyres
Moto
They are MSA list 1b tyres and are available in a medium & soft compound.
Before getting the cheque book out, it would be good to know if anyone here has experience of, or thoughts about these tyres.
The two main questions on my mind are :
1) which compound to go for - used as road car (2,000 miles / year) April thru October & competing in 6-8 hill climbs / sprints each year
2) how much additional stress on components such as diff, from using much softer compound tyres
Moto
They are a great historic racing tyre especially good in wet weather. they are good if you need to run a historic tyre but there are many other tyres which are better. In a 185 you should be able to use a Yoko AO48 or similar semi slick road legal tyre. It depends on how much road / competition bias you need.
Good but v expensive tyre but only based on whether you absolutely must have a historic tyre. On my race car they are approx 4-5 seconds slower per lap when compared to a Yokohama AO32 as an example.
If you are using std vixen rims then a 185 / 65 is a better bet and opens up much more choice, mini lights you can go to a 195 60 or 65 !!
If you want to be quick then you need to junk any notion of a 70 or 80 profile tyre
N.
Good but v expensive tyre but only based on whether you absolutely must have a historic tyre. On my race car they are approx 4-5 seconds slower per lap when compared to a Yokohama AO32 as an example.
If you are using std vixen rims then a 185 / 65 is a better bet and opens up much more choice, mini lights you can go to a 195 60 or 65 !!
If you want to be quick then you need to junk any notion of a 70 or 80 profile tyre
N.
Edited by Dollyman1850 on Friday 1st June 10:34
Nankang NS-2R is available in 195/55/15 and I really like the tyre. Good price, great (comparatively) in the wet and a full 8mm tread. I use the 'hard' compound and they do take a lap to warm up. Not used the soft so can't say whether they warm up quicker. If you're doing sprints and hill climbs then I'd say get the soft.
Thanks for the info - very helpful.
In response to Neils point, I don't need to go historic tyre route and yes they are stupid money. It's just that all the obvious tyres (Yoko's , R888's, Kumho's etc) are not available in any size taller than a 55 profile. As I was planning to run std Vixen (fin) rims it would reduce the tyre circumference by ~10%. That's OK for the track (possibly even good as a sprint / hill climb car) but it would screw up the car for road use - especially as I have the 4 speed box.
I did think about getting a set of minilites in 16" with a lower profile tyre but they are only available up to 15". Any suggestions on a period 16" rim and if so would this be a better option ?
Alternatively the other option is to stick with 1a's. Much much cheaper route but also getting limited for choice on taller profiles. Rainsports for example are max 55 profile.
Moto
In response to Neils point, I don't need to go historic tyre route and yes they are stupid money. It's just that all the obvious tyres (Yoko's , R888's, Kumho's etc) are not available in any size taller than a 55 profile. As I was planning to run std Vixen (fin) rims it would reduce the tyre circumference by ~10%. That's OK for the track (possibly even good as a sprint / hill climb car) but it would screw up the car for road use - especially as I have the 4 speed box.
I did think about getting a set of minilites in 16" with a lower profile tyre but they are only available up to 15". Any suggestions on a period 16" rim and if so would this be a better option ?
Alternatively the other option is to stick with 1a's. Much much cheaper route but also getting limited for choice on taller profiles. Rainsports for example are max 55 profile.
Moto
Moto said:
Thanks for the info - very helpful.
In response to Neils point, I don't need to go historic tyre route and yes they are stupid money. It's just that all the obvious tyres (Yoko's , R888's, Kumho's etc) are not available in any size taller than a 55 profile. As I was planning to run std Vixen (fin) rims it would reduce the tyre circumference by ~10%. That's OK for the track (possibly even good as a sprint / hill climb car) but it would screw up the car for road use - especially as I have the 4 speed box.
I did think about getting a set of minilites in 16" with a lower profile tyre but they are only available up to 15". Any suggestions on a period 16" rim and if so would this be a better option ?
Alternatively the other option is to stick with 1a's. Much much cheaper route but also getting limited for choice on taller profiles. Rainsports for example are max 55 profile.
Moto
min 6j x 15 inch minilites and fit a 205 60 15 Yokohama AO48 ??In response to Neils point, I don't need to go historic tyre route and yes they are stupid money. It's just that all the obvious tyres (Yoko's , R888's, Kumho's etc) are not available in any size taller than a 55 profile. As I was planning to run std Vixen (fin) rims it would reduce the tyre circumference by ~10%. That's OK for the track (possibly even good as a sprint / hill climb car) but it would screw up the car for road use - especially as I have the 4 speed box.
I did think about getting a set of minilites in 16" with a lower profile tyre but they are only available up to 15". Any suggestions on a period 16" rim and if so would this be a better option ?
Alternatively the other option is to stick with 1a's. Much much cheaper route but also getting limited for choice on taller profiles. Rainsports for example are max 55 profile.
Moto
There are a number of other performance tyres in 60 profile providing you are not going beyond 205 width.
I bet you could buy a set of rims and yokes for almost the same price as a set of CR6ZZ's ?
N.
I have a Healey 3000 on CR6ZZs (185/70R15 89H), was used for road rallies (including forests and tarmac) and the occasional hillclimb. Good in the wet and they last well, but now I need to replace two of them and am thinking of going to XASs instead as I no longer compete so much with the car. Is the XAS an option for you ?
Moto said:
Neil.
Interesting comparison on lap time difference between A048 & CR6ZZ. Any data on much slower a 1a tyre would be compared to these?
Moto
Most modern road tyres will be on a par with the CR6ZZ or possibly even slightly better.Interesting comparison on lap time difference between A048 & CR6ZZ. Any data on much slower a 1a tyre would be compared to these?
Moto
I would switch to a 6j or 7j Minilite and then use a 195 / 65 / 15 tyre which opens up a myriad of choice and in real terms not much in it for rolling radius.
Have a look and talk to Dougal at Longstone Tyres many of the old patterns are getting re-manufactured for Historic cars but be careful. mixed stories regarding the quality of the tyre construction since they are made under license..
I like the Vredsteins on Dads car.
N.
Edited by Dollyman1850 on Saturday 23 June 19:59
That's good news. I've just put on a set of Conti Premium 5's in 195/65 x 15 as an interim for the rest of this season. The existing C-drives were 8 years old and the rubber was hard, good fun in the corners but not doing much for times.
My thinking is along the same lines as you suggest - a set of Minilites in 6"or/ 7" probably running a set of R888's as the Kumho V70a, A032 & A048 are all now restricted in 1b to OE fit cars. I've spoken with Minilite and although not shown on their site, they will supply a set of 16" rims in 7", so that would enable a 55 profile with a similar circumference as a 15" in 65 profile.
Getting there slowly....
Moto
My thinking is along the same lines as you suggest - a set of Minilites in 6"or/ 7" probably running a set of R888's as the Kumho V70a, A032 & A048 are all now restricted in 1b to OE fit cars. I've spoken with Minilite and although not shown on their site, they will supply a set of 16" rims in 7", so that would enable a 55 profile with a similar circumference as a 15" in 65 profile.
Getting there slowly....
Moto
gothatway said:
I have a Healey 3000 on CR6ZZs (185/70R15 89H), was used for road rallies (including forests and tarmac) and the occasional hillclimb. Good in the wet and they last well, but now I need to replace two of them and am thinking of going to XASs instead as I no longer compete so much with the car. Is the XAS an option for you ?
A friend of mine also has a Healey 3000 phase 111 and he has fitted XAS and he is well pleasedAlan
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