Heat cycled.

[Dezoris]

Originally Posted by glamcem

Are you guys referring to the overheating or heat cycling? This is the first time I am hearing a 200 rated street tire having heat cycling issues Heat cycling generally applies competition tires and heat cycling process is also offered for racing/competition tires. Most of the time people over heat their tires and think they are heat cycled out

Also the initial heat cycling process extends the life of the tires. FYI, many people run their NT01 to the cords ( they typically flip them on the wheel after the outer tire is worn out) and they claim the tires perform better (possibly after the tread is gone)

Here is a good read about the heat cycling if you're interested:
http://www.tyre-technology.com/index.php/heat-cycling

I think what they are seeing is a combo of both, as the tire compound for the Dunlops dont seem to be consistent down to the bottom half of the tread where rubber seems to be much harder. Add on some nasty heat cycling and you have a dead tire.

It's hard to make a tire work for street and hard core competition without some trades off for street or track/autox.

[glamcem]

Originally Posted by Dezoris

I think what they are seeing is a combo of both, as the tire compound for the Dunlops dont seem to be consistent down to the bottom half of the tread where rubber seems to be much harder. Add on some nasty heat cycling and you have a dead tire.

It's hard to make a tire work for street and hard core competition without some trades off for street or track/autox.

yes, and that's the reason why I don't feel the "compromise tires" especially when we can fit an extra set of wheels in our cars (and many other things)





Nitto NT01s cost nothing unlike the more expensive R compounds (such as pirelli trofeo R or Michelin Sport Cup/Cup 2)

[Pat]

Originally Posted by forwallblakmail

Is there a way to tell if a tire is hear cycled out? Is that a thing? I don't know if my Z2's just got too hot today but my last autocross run they seemed to fall off a bit. I only ask because I have a slightly fresher set I can get mounted on before next weekend's ProSolo.

The tires in question have approximately 21 autocross runs on them and 1 track day with 4 20 minute sessions (1.6 mile course, pushed pretty hard).

I realize this is vague, but a shot in the dark for anyone who may have insight.

Thanks!

Do you know about durometers?
http://www.saferacer.com/longacre-tire-durometer

[forwallblakmail]

Originally Posted by Pat

Do you know about durometers?
http://www.saferacer.com/longacre-tire-durometer

Never seen or used one before. Looks like it could be a good buy though.


Slight deviation from topic, what kind of pressures are you guys running in the RS3? I know it will need to be higher than the Z2

[CSG Mike]

Don't cook your street tires. The grip will never quite come back.

If you lose grip without the tires making noise, they're heat cycled out.

[juliog]

Originally Posted by forwallblakmail

Slight deviation from topic, what kind of pressures are you guys running in the RS3? I know it will need to be higher than the Z2

I usually shoot for 37F/36R hot, because it feels right, but it might not be ideal. I need to get a pyrometer and do some testing..

[CSG Mike]

Originally Posted by juliog

I usually shoot for 37F/36R hot, because it feels right, but it might not be ideal. I need to get a pyrometer and do some testing..

You can use ours.... but if you break you buy :p

[solidONE]

I hear the rs3 v1 cycle out pretty rapidly loosing most of it grippiness with more than 50% left. Ever hear of people running tire Warmers on cars at trackdays? I've seen them on go karts.

[TrogDor the Burninator]

I have heard ZIIs give way more warning before breaking loose than RS3's ... true or false?

[CSG Mike]

Originally Posted by TrogDor the Burninator

I have heard ZIIs give way more warning before breaking loose than RS3's ... true or false?

RS3 is more slip angle tolerant, so some people perceive the Z2's lack of tolerance as being more progressive.

Originally Posted by solidONE

I hear the rs3 v1 cycle out pretty rapidly loosing most of it grippiness with more than 50% left. Ever hear of people running tire Warmers on cars at trackdays? I've seen them on go karts.

Don't cook your tires. Most people on RS3 do not know how to preserve their tires.