ZZS replacing CR500.. they are wider, is this a problem? Ans: Apparently not.

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anthonym
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ZZS replacing CR500.. they are wider, is this a problem? Ans: Apparently not.

I am on my last set of CR500s... which are probably now a bit old already.

and ZZRs.. any road utility?

I gather ZZx tyres are heavier. Are the sidewalls also stiffer? I am of course accustomed to my CR500 tyres having been specifically designed for my R500 car, so not enthusiastic about in future having to use what amount to generics. Has 20 years allowed advances relevant for me and my car?
 

Anthony

 


 

rj
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I've found my car to be faster on the circuit using ZZS rather than ZZRs under most conditions.

It could be due to setup of the car.

Being wilder may need you to re-set the rake and maybe to add a little more toe-out to make the car want to turn in again.

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StevehS3
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The only downside to ZZS that I've noticed is the weight. I think they are a bit better all-round than CR500. Wet grip seems surprisingly good and they don't crack!

John Vine
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Width (at the front) wasn't a problem on my R400D when I changed from CR500 (195/45-R15) to ZZS (195/50-R15).  To my surprise, the ZZSs just squeeze under the wings, as the shoulders are more sloping than the CR500.

Also discussed here.

JV

 

anthonym
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175 to185 seems to be the increase, or 12mm i i u c. I have added specs to the o.p.

190mm to 202mm

my CR500s have never cracked a f a i k. Possibly lucky as regards storage.

 

John Vine
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These were my CR500 cracks (in 2017, on 4yo tyres):

Apparently, the cracks are just cosmetic, although they'd likely have failed an MOT due to the carcass being visible.

To their credit, Avon were very responsive. 

JV

 

ScottR400D
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I have ZZRs on my 2015 R400D. When I got the car it had CR500s but I also had a set of ZZRs on other rims for on track. 

The car was set up for the ZZR and wasn’t much changed for road use with the CRs. I just altered the toe and camber. (With the track settings for ZZRs I found it twitchy and susceptible to tramlining on the road)

I now run ZZR all the time and avoid the rain. I’ve fitted JWM rose jointed top joints so it’s a quick job to go from high camber/toe out to less camber and parallel which I find better on road. 

The ZZRs do weigh more and ride harder, especially when new, so I guess they are stiffer. 

No problem with clearance. 

anthonym
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Ok so that raises anyroad difference ZZR v ZZS

ScottR400D
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Never used ZZS, I guess they must be better at shifting water. 

7 wonders of th...
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R888R's are well worth a look.... Thumb Up 

anthonym
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https://www.pistonheads.com/gassing/topic.asp?h=0&f=101&t=1566751&i=20

compares CR500 ZZS ZZR 

The final three posts express concern. About the ZZS tyres developing flat spots over as little as 8 werks.

R888s not mentioned. Need more on those.