Too many variables.

Type of competition
Weight
ride height
driving style
NA or NB
wheel width
spring rate
sway bar diameters
toe
rake
power
driving style
surface
ambient temp
surface temp

Before you start listing your params, no one here has a master spreadsheet of all possible combinations. Tire mfrs list cambers but they are worthless as they do not differentiate between strut and unequal length control arms.

You won't learn anything if you aren't sticking a temp probe into the tire. You can take some good guesses and might stumble on something that works but you'l never really know unless you do at least a little data gathering and testing. Or you can just say screw it, -3.0° and worry about other stuff.

Just start somewhere between -2.5 and -4.0° and take temps. Record G and lap times if you can.

Thank you, now I know where you're coming from. Only reason I asked is that Hoosier gives a suggested camber setting to get you started. I'll go with my 3.2/2.7 starting point and tune from there.

I saw this asked but I don't think answered. How many track hours were you getting with these?

Can I get some clarification on the 225/45-15 Rival S variants? Tire Rack currently has that tire in a W81 ZR rating They have on order but have no expected delivery date another version, "V-rated". I'm assuming the latest and greatest autocross compound is that not yet available V-rated tire? I'm basing this on an old tire test article from Grassroots.

I think you're just seeing a typo in the specs or something, there is only one rival S, they just changed the internal construction mid stream with no good way to tell which is which.

No, the V rated one is supposed to start coming out as tires go out of stock after solo nationals. They're stiffer and stuff.

I asked Andy Hollis about this in another thread and he said there was no obvious marking difference..... So maybe that's changed since he got the first set.

I re-read the August Grassroots test and they just referred to them as 2016 Rival S's vs 2015 Rival S's. I can't tell from that if we're talking a running and invisible change, or the new V designation.

In the Maxxis thread there is a comment that the new RivalS has the V rating.

I am looking for additional feedback on these Rival-S tires for street use. I am considering using them on a different (non Miata) weekend sports car that sees about 2k-3k miles a year.

Noise?
Expected life cycle?
Ride quality?

You'll get about 2 years worth of use out of them. Noise, ehh it's a convertible nothing passes up the wind noise. They have a fairly stiff sidewall so not as good as a normal street tire.

You're the completely wrong application for this tire. Grip is so out of this world you can't experience the limits of the car without risking losing you license. I put the stock 14's back on the race car just to have fun on the street.

I did 4-5k street miles on my set last year. Not any noisier than any other max-performance 200tw, certainly not a mud-swamper like the NT01 is. Expect 4-5k miles, far less if you do any track days. Ride quality is fine, street-tire-esque. They are a good low-miles max-effort street tire. I will say that if you can get the RE71R in your sizes, do that instead.

It's not a convertible but I always run with the windows down. I know the tire is not targeted for guys like me but if life cycle is reasonable (1-2 years 5k miles) why not. I primarily drive coastal Hwy 1 through the twisties so grip does equal fun. I tried street driving NT01's. Not to bad when new (bit harsh though) but after a few track days man did they howl.



No RE71R's in my size. Everything else you said sounds perfect.

Thanks to both of you for taking the time to reply.

RE71R
 

It sounds like RE71R is a great tire esp if I might run into occasional wet weather. Im currently using 225/45/15 NT01s on my 949 9 inch wheels. Is there a RE71 tire size that would be appropriate ? I cant seem to locate ie on Tire Rack

Nope...... Which is why the rival is preferred over the re71, the 205 re71 on an 8" wheel is darn close but solidly behind the 225 rival on a 9. If they make an re71 in a 225 it'll trump the rivals, but so far no dice.

"Solidly behind" is too strong a wording. My testing showed the 225 Rival to be less than half a second behind the RE71R. On faster courses, the RE71 would absolutely be faster.