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04-21-2022, 07:45 PM | #23 | ||
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tsk94 defined one heat cycle perfectly above i.e. from the ambient condition bringing the tire up to the operating temperature range (zone) its tread compound(s) and other rubber components were designed to operate within - once - and then allowing the tire to thoroughly cool down to ambient temperature. So one on track session equals one heat cycle IF the tire is exercised hard enough to get it hot enough to "come-in" i.e. into its tread compound's peak grip temperature regime. Sorry for all the words. A tire's rubber compound(s) - especially its tread - are designed (compounded) to perform at peak grip depending upon the environment it's being used in. Example: a winter tire is designed to be supple and provide grip well below freezing in ice and snow, but that same winter tire doesn't do well at a race track during hot laps because the rubber compound in the tread isn't designed to operate at high ambient and hot operating temperatures (it will tear and wear like cheese). The topic of rubber compound operating temperature is discussed in the .pdf file attached - should you need more detailed information (starting on page 8). .
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04-21-2022, 07:47 PM | #24 | |
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Will probably wear a bit quicker but the cheaper cost can help offset that.. |
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04-21-2022, 10:06 PM | #26 |
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I have had a different experience with the NT01 vs RR.
An RR is about 1 to 1.5 seconds faster on a 2.4 mile course on a 1:41-1:43 lap. And the RR falls off after about a 4-6 heat cycles and then eventually is an NT01. The RR is more durable and gets to about 2-3 seconds off the fastest pace. NT01s - they are consistent until corded. Usually run a .5 sec to 1 sec faster lap on the first day. This is my 04 M3 that is 2630lbs dry…I have never corded an RR. Rarely do I cord an NT01. They both eventually heat cycle out after 8 days and become pretty bad.
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04-21-2022, 10:48 PM | #27 | |
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*They did not work on the race car and would have required a bunch of setup changes. |
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04-22-2022, 06:47 AM | #28 | |
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When the rear is 295/30/19 I use 285/30/19 front When rear is 275/35/19 I use 265/35/19 While I don't care about tire manufacture, I do match the type. If I can't match the type I use stickier tire on the rear. Having said that, I break my own rules when I feel like. |
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04-22-2022, 08:19 AM | #29 | |
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I've found the RR to be faster, by only by ~0.5 seconds in my experience. But, different car and track compared to your test so I'm sure it can vary. I suppose the one thing I should note is I always put 1 initial heat cycle on the tire, and let it sit for at least 24 hrs before running it again. Do you do the same, or just run them from new? Perhaps that plays a part in the discrepancy as well. |
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04-22-2022, 08:48 AM | #30 |
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Street use article below from November 23, 2021 - Nitto NT01 vs Toyo R888. On track test data within the video below and at the speed.academy link. Same car, same track, same driver, same day.. See this March-2019 speed.academy article with telemetry data about the R888R: https://speed.academy/100-tread-wear...c1-toyo-r888r/
. . Street and general use article re: Nitto NT01 vs Toyo R888 https://tireterrain.com/nitto-nt01-vs-toyo-r888/ .
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Last edited by DrFerry; 04-22-2022 at 08:57 AM.. |
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04-22-2022, 10:06 AM | #31 |
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I really really like the RR 295/30/19 on the rear when I was able to get them for $208/tire. Unfortunately they don't come in useful size for my front, so I always have to pair them with 200tw tire.
Now that they went up in price, they lost some of the appeal. |
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04-22-2022, 10:14 AM | #32 |
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Anyone know much about the Proxes RS1 slick? It looks like a potential Hoosier R7 competitor. I found only 1 review, but I also found the specs interesting because of the rayon carcass choice (better thermal stability under load) and the steel reinforced sidewall architecture (better lateral stability, yaw damping and steering response).
. https://www.toyotires.com/product/proxes-rs1/. . https://trackdaytire.com/product/toyo-proxes-rs1/ . . https://www.lsxmag.com/news/upping-g...e-tire-lineup/ .
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04-22-2022, 10:24 AM | #33 | |
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https://trackdaytire.com/product/toyo-proxes-rr/ IF you ran an 18inch front wheel then you can get a 275/35R18 RR also at the link above. Perhaps you could buy someone's used OEM 9.5X18in rear axle wheels and use them on your front axle - assuming your brake calipers will allow that. This is quite common with Porsche ALMS where teams run different size wheels on the front and rear axles.
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04-22-2022, 10:30 AM | #34 |
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I can't run 18" wheels.
this issue has been debated enough in other threads and this horse has been dead for two years. :-) I have settled on 265/35/19 as my go forward fronts. Many 200tw choices and good enough. There are no fast tires in 285/30/19 but once in a while a max performance tires (300tw) comes on sale and is cheap enough to add to inventory. My home track, NYST, eats front tires and therefore I go there with as cheap 285/30/19 as I can find and call it good enough. |
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04-22-2022, 11:04 AM | #35 | |
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04-22-2022, 11:04 AM | #36 | ||||
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04-22-2022, 11:09 AM | #37 | |
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04-22-2022, 11:26 AM | #38 | |
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04-22-2022, 11:54 AM | #39 |
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I remember watching that and laugh when he said the I don't get why the internet loves the R888R.
After my RE71R wear out, I'll be in the same boat as Redd. I think ECF, or SC3 would be on the top of my list of HPDE lapper tires.
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04-22-2022, 11:58 AM | #40 | ||
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I am counting thousands of $$ per season. If I were you, I would not assume that you know better about how to spend my money :-) |
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04-22-2022, 12:07 PM | #41 | |
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04-22-2022, 12:08 PM | #42 |
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SC3R for me. I'm on my 2nd set. Great track tire, quiet on the street if you drive on the street. Grip is up there with the Michelin Cup 2 R tires, NT01 and others. Grip also doesn't fall off as it gets hot like other street tires. Even though it is sold as a "street" tire, this is a R compound tire and should be treated as such.
Just be aware they are very bad in cold temperatures - anything under 60 F. You need to warm up the tires before they grip. 1st few laps are always a bit scary as it can slide out as if you're on ice.
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04-22-2022, 12:12 PM | #43 |
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04-22-2022, 12:17 PM | #44 | |
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