How Toyo's new Proxes R compares to the outgoing RR | Tire Test

Great info. Now how about a test between the "R" and the new Hoosier ECS? 

barthayes said:

Great info. Now how about a test between the "R" and the new Hoosier ECS? 

Yiou mean RCES? 

ECS is a Conti product -- Extreme Contact Sport

And then there's ECF - Extreme Contact Force

Hoosier RCES stands for Road Course Endurance Spec -- which is basically a harder R7.

Will we test it?  Maybe.  Contemplating an "All Things Hoosier" vertical taste test once the new tire testing slows down. Slick vs A7 vs R7 VS TAP VS ????  Kinda like we did with Yokohama last year.  Nice to know what you're getting when you step up a level.

In reply to Andy Hollis :

Yes Andy, sorry I wasn't spot on. In SE46 we are currently faced with both tires (RCES and the R) this season, depending on the sanctioning body. It would be interesting to see a real controlled comparison. 

Hi to all,

I am new to this forum and this is my first post. 

I have a US-built Brammo Ariel Atom2 with a supercharged Ecotec motor putting out 300HP.

I am planning some autocross and some track days at Weathertech Raceway in Monterrey, California this May.

Since my car is street licensed, I'm currently running Toyo R888R'S - 275/40/17 rear, and 205/50/15 in the front mounted on Konig Hypergram wheels - 17 x 9 rear and 15 x 7.5 in the front.

I would appreciated any advice on all subjects, and particularly which race tires to use on the track. I'm hearing good things about the new Toyo Proxes R, but I haven't found any data on a super lightwieght car like the Atom.

Thanks so much,

Bob Smith in Northern California

p4smitty said:

Hi to all,

I am new to this forum and this is my first post. 

I have a US-built Brammo Ariel Atom2 with a supercharged Ecotec motor putting out 300HP.

I am planning some autocross and some track days at Weathertech Raceway in Monterrey, California this May.

Since my car is street licensed, I'm currently running Toyo R888R'S - 275/40/17 rear, and 205/50/15 in the front mounted on Konig Hypergram wheels - 17 x 9 rear and 15 x 7.5 in the front.

I would appreciated any advice on all subjects, and particularly which race tires to use on the track. I'm hearing good things about the new Toyo Proxes R, but I haven't found any data on a super lightwieght car like the Atom.

Thanks so much,

Bob Smith in Northern California

1) Anything will be better than the R888R, in all ways -- except for drag racing.  Super old tech tire.

2) Look at the tire Guide chart column labeled "Warmup" and select something with an A.  Light car will have trouble turning on the compound for anything else.

3) Now select based on desired Pace, price and size availability.

4) Proxes R is a solid choice but needs some heat to turn on.  You may have trouble with that, especially in the front.

In reply to Andy Hollis :

Thanks for the feedback - I'm only running the R888R'S on the street, as slicks are illegal. That's why I want to use some high grip tires for the track...I'm really looking forward to my track time in a couple of months. I'm not looking to break any track records - just to have maximum challenge and fun!

I'm also considering buying a driver training/helper device - what do you think of the Garmin Catalyst?

p4smitty said:

In reply to Andy Hollis :

I'm also considering buying a driver training/helper device - what do you think of the Garmin Catalyst?

This is a tire thread.

Here's a story and discussion thread on the Catalyst: https://grassrootsmotorsports.com/forum/grm/what-makes-a-better-driving-co/271270/page1/

I did the NCM HPDE yesterday in my Cadillac ATS-V sedan.  In the third session I corded my RF 285/30R18 RE71RS that had *nine* total sessions on it.  I think the lack of life is a combination of the ATS-Vs 3800lb weight and me overdriving, but for the afternoon I threw on a sticker set of 275/35f 295/30r Toyo Proxes R. I had previously considered using the RR as a DE tire, but with Andy's test of the Proxes R it became a no-brainer.

Now to disclaim - I'm not that fast :-)

First session on the Proxes R I ran a 2:19.8 - fastest single lap of the day on the 71RS was 2:19.26 but they were well out of pressure/temp window after that. In the second/final session on the Proxes R I went 2:19.67 but was able to consistently run back-to-back 2:19-2:20s (traffic notwithstanding).  Only tire I've ever driven that was that fast/consistent was Pirelli DHB scrubs.

I tried 28psi cold and targeted 34psi on the Proxes R, and I think both are at least 1psi too high on the ATS-V. The rear 295/30R18 Proxes R had a *lot* more slip angle than the 71RS of same size, but the Toyo's slides were gentle & predictable.  The Proxes R needs more warmup too, but that's not a surprise compared to a pointy-end Super 200 that is good at autocross.  Coming off track, my Longacre pyrometer showed 160 outer and middle and 167 inner on the left front (car has -3.0 front camber) 

The ATSV is a heavy beast that is hell on fronts, so hopefully the Proxes R can provide better longevity/consistency and similar pace to the 71RS.  I did have the Proxes R mounted per Toyo's recommendation (fronts with DOT date left, rears with DOT date right).  I can only rotate side-to-side so I'll update about the tread splice issue if it arises as well.