Which tire would offer more grip a ADO8r 215/40/17 or a more narrow 205/40/17 R888? If price and wear is not a factor. Thanks
I am not aware of any formal definition for the term "R compound" (although you may be right). From my experience, the term "R compound" is normally used for tires designed for track/competition/autocross use and not designed for street use, such as all of those in the three Tire Rack performance categories:FWIW "R compound" is starting to mean less and less eveyday. It's an arbitrary UTQG rating of 140 or less... so if your tire is 150, it is not technically an "R compound" anymore but a "street" tire.
I assume you are using the term "ultra high performance" generically, and not the specific way the Tire Rack does (where it's a budget/performance category for summer tires, and the highest performance category for all-season tires).Ultra high performance street tires keep inching closer to dedicated track tires all the time, and "track day" tires are inching towards more of a street tire all the time as the owners like to drive their cars to and from the track, in the rain, etc.
Okay. I'm sure those going to the track will continue to use the term to apply to tires not designed for street use.Ken most clubs and sanctioning bodies are now defining R comp specifically as "any tire with a UTQG rating of 140 or less". They had to give the term definition because the classes requiring R comp or street was getting too vague.
You heat cycle NT01s out sooner than R888?
How many heat cycles? IMO the nt01 is one of the more consistent tires out there.
That's probably the issue. 6 cycles is nothing for them and they shouldn't fall off significantly.
The R888 was warmed up by the time my truck was in operating temps.
maybe Dave's heat cycle is really just a warm cycle:tongue:
Batman, R888s optimum grip is when the tire is in 160°F to 220°F range (per Toyo). There is NO WAY you can get a tire up to these temps just driving without extreme aggressive cornering, ie creating a slip angle which causes friction and thus heat. This is why you see race cars weaving back and forth aggressively before restarts.
If your tires don't have a gravely appearance and texture to them like this pic, then you aren't even close to getting them up to the optimal temps.
<img src="http://members.rennlist.org/m758/_tHC3-RR.jpg"/>.....