[Twt]

Originally Posted by Daytona_550

Yes, as mentioned in my OP, I will be switching the tires left to right, right to left (so the worn-out shoulder on the outside, will now be on the inside).

Barber will be 2-day weekend with 4 x 30min sessions each day. Car will go on a trailer (8-hrs each way. I'm not driving the car).

This is my first experience with tire wear on track, so trying to get a feel for how much degradation I can expect thru one more weekend.

I was hoping to get one more weekend and then replace the whole set but if this tire is borderline going to mess up my weekend, I rather replace it and only have to worry about my driving.

Thanks for any experience you can share.

I have run/raced at Barber and it is a world class track...recently resurfaced. While I think your tires will make it , I would bring a pair of back ups. If Chin is there then Corsa Crew will be on site with a full tire changing set up...they do great track side work.

[dvas]

Originally Posted by Daytona_550

This is my left rear RE71R (dedicated track tires) after a weekend at Sebring.

A brief history... The shoulder showing the most wear was on the outside. Starting PSI was 26-27 and they never got past 36. Rear camber was -1.8. Ambient temp was 96F (June in Florida).

Sebring was the 3rd event for these tires (Daytona and Roebling before).

My next planned HPDE is Barber in November, and I intended to run this tire on the right side of the car to even out wear.

All three other tires look good for another weekend but I'm a little worried about this one.

For those familiar with RE71Rs (and Barber), do you think this tire will make it thru another weekend?

That's some interesting wear. I haven't experienced poor rear tire wear like that on the M2 with any of my tires, including the RE71s I ran last year. The rest of the tire doesn't look like it was abused too badly, so I would guess that your alignment may be off in the rear. Or possibly suspension settings if you have adjustables.

Having said that, I think that as long as you put the wheel/tire on the side that will get less abuse, you should be fine. The wear will probably even out.

I had run the RE71s until all the thread was gone, which was about 4 - 5 days. The grip was gone before the thread but I still ran them as it was a three day event and I didn't have an opportunity to mount new tires.

Fore reference, here are some pics of my front after two short sessions (~35min on track), after 5 days, and a compare to spent NT01s that I ran until the chords started whipping around in my wheel well.

[dvas]

Originally Posted by NY135ivishnu

Good afternoon gents.

I just booked a august 30th track day at NYST. This will be the first course I attend on my M2C. I have an idea of things to do to prep. I'm writing here to see what people do that have frequent track days.

My car has the following

-full bolt ons
-bootmod3 time stage 2
-apracing kit front and read with ds2500 pads fresh flush.

-bc coils
-front sway from afe
-18" apex sm10 265 front, 295 rear nitro nt05

I've ordered fresh oil and csf heat exchanger. Do you guys recommend anything else ?

Gloves?
Fire extinguisher?


Any advice is appreciated.

Nice mods, but I would suggest you forget about all of that for your first track day. Same with the fire extinguisher, unless your M2 has a hidden Ferrari engine under the hood. Gloves are nice, and I use them, but not really necessary.

Rather than worrying about the gear, my suggestion is to focus on prepping mentally. That will go a lot further in your development and the fun you have. Watch some youtube vids to get a sense of NYST. Bring yourself a folding chair, sun screen, a torque wrench and plenty of water. Get a good night's rest and have a clear head for the track day. Leverage an Instructor if they are available as, assuming they are decent, they will help you accelerate driver development..

[Daytona_550]

Originally Posted by dvas

That's some interesting wear. I haven't experienced poor rear tire wear like that on the M2 with any of my tires, including the RE71s I ran last year. The rest of the tire doesn't look like it was abused too badly, so I would guess that your alignment may be off in the rear. Or possibly suspension settings if you have adjustables.

Fore reference, here are some pics of my front after two short sessions (~35min on track), after 5 days, and a compare to spent NT01s that I ran until the chords started whipping around in my wheel well.

I like the even wear on your tires after 5 days. That's what I was hoping to get to after my next event.

I am running stock suspension and had an alignment just before the event. Everything is solid underneath and the car drives fine but I'll definitely do an alignment before Barber (could be that Sebring did what it is famous for, and knocked it out of alignment sometime during the weekend). Or maybe I (or my instructor) just over drove it on initial laps when PSI was still too low. :

[Daytona_550]

Originally Posted by Twt

I have run/raced at Barber and it is a world class track...recently resurfaced. While I think your tires will make it , I would bring a pair of back ups. If Chin is there then Corsa Crew will be on site with a full tire changing set up...they do great track side work.

Thanks for the response!

I keep hearing great things about Barber. My instructor calls it the Disney World of race tracks!

[243Racing]

Speaking of tire wear, here are my R888R's

[243Racing]

It's really weird to me how they don't wear like other R-Comps do (see the rE-71 and NT01s above)

[Bewstd]

Originally Posted by Montaver

Depends on your driving style, if you plough into every corner and overdrive them they will wear much quicker. When they start shrieking back off your steering angle a little bit. If you manage the heat you should have no issues, they are great tires. I have tracked on PS4S a few times and they get a bit soft and squirmy after a few hard laps. If its your first day number one priority should be have your brakes in good order.

thanks man!, about to do a fluid swap

[Twt]

Originally Posted by BeastieBombRacing

Speaking of tire wear, here are my R888R's

Drifting the M2 is also hell on tires:

[243Racing]

R888Rs are hot garbage

[tux2005]

Anyone have opinions on the Nankang AR1s? I've been running RE71Rs and RS4s, the RE71Rs were awesome but wore out too fast, RS4s have lasted ages for me.

[243Racing]

Originally Posted by tux2005

Anyone have opinions on the Nankang AR1s? I've been running RE71Rs and RS4s, the RE71Rs were awesome but wore out too fast, RS4s have lasted ages for me.

For a hot lapping tire, I'm sure it would be fine. If laptime is important, I'd stay away.

[243Racing]

Another question for you guys.

I'm currently running 255/35 and 275/35 track tires.

The next tire I'm going with doesn't come in a 255. So should I run 245 and 265 or keep the 275 out back?

[Daytona_550]

Originally Posted by BeastieBombRacing

Another question for you guys.

I'm currently running 255/35 and 275/35 track tires.

The next tire I'm going with doesn't come in a 255. So should I run 245 and 265 or keep the 275 out back?

From what I have read here, a 245/275 setup would move the balance toward understeer.

I am also running 255/35 and 275/35 and pretty happy with the balance but considering 285/35 rears the next time around to get better grip on corner exit.

In your situation, I would do 245/275.

[243Racing]

What I'm hearing is...get some wider wheels to run 265 up front? Lol

[Megator]

Originally Posted by tux2005

Anyone have opinions on the Nankang AR1s? I've been running RE71Rs and RS4s, the RE71Rs were awesome but wore out too fast, RS4s have lasted ages for me.

I ran the AR1s in 295/30/18 on the rear of my car (with NS2R 265/35/18 in the front) and they are good. Get up to temp nicely, dont get greasy over short stints (20 min or so) and are grippy enough to make the car more neutral and let you get on the power sooner out of corners.

The tires break away pretty nicely and you can even do a slide or 2 on em without much issue/talent.

I only had them on for 2 trackdays one with 20min sessions and 1 with an open pitlane but where I gave my family passenger rides (so stopping ever 15-20 min). So no long session review yet.

They do wear very fast though as they are 80 treadware. They are also not super cheap (I got a deal) and at least where I am for a bit more you can get Cup 2s which would likely be my preference.

I only have exp. Cup 2s as a passenger though. Oh they are also quite noisy as a street tire so keep that in mind.

[PLF69]

Originally Posted by BeastieBombRacing

R888Rs are hot garbage

My R888R are almost done, I wonder how much 245/265(R888R) vs 255/275 (Cup2) size can have an impact but my observations are as followed:

- I did not find more grip in the R888R, I could not be faster, I found them harder to exploit and they felt less confidence inspiring than the Cup2.

- Durability seems similar, I got 10 track days with the Cup2 and I expect the same from the 8r's. NOTE: Cup2 are way more sensitive to shoulder wear.

- I chose the 8r's because I have a special price on Toyo tires but I will not be buying them again, overall I did not find the tradeoffs in wet grip and street manners worth it.(I have to drive many hours to and from tracks)

- I will not be buying R compound tires again unless I start to swap wheels at the track. 200tw tires have come a long way and for the 10 or so track days I do per season It should well enaugh.

- I ordered square Apex 18x10 wheels for track duty. Stagger may be faster but the convenience for non competitive use does it for me.

[243Racing]

I think stagger is only faster if you're doing it to maximize the rear contact patch.

I'm still not sure what to do for my next set of tires but I need to figure it out quick.

Might just yolo it and try a 295 on an 18x11 out back ...

[5.M0NSTER]

I'm still working on maximizing the grip from the 245/265 cup2 setup and turning it into lap time. I picked up ~4s on the 'Ring, and I know I should have picked up ~10s or so. Which tells me I'm too slow in a lot of the corners still. I have worked up the courage to go no brakes through Mutcurve and the little right-hander which follows it. But I'm still at SuperSport speed in many other areas. I need more practice.

Tires themselves are great. Whenever I screw up and need extra grip to save it, they got me. I just need to use more of the margin to turn it into lap times.

[Megator]

Originally Posted by BeastieBombRacing

I think stagger is only faster if you're doing it to maximize the rear contact patch.

I'm still not sure what to do for my next set of tires but I need to figure it out quick.

Might just yolo it and try a 295 on an 18x11 out back ...

You dont need 11s. I run 295/30/18 on 513M 18*10s as I said above. Tire seems happy on the rim. With no weird squirmyness.

@5.M0NSTER the issue with the ring in my eyes is that its not a learners track. Tracks like Assen or any big motorsports one are probably better as they give you the opportunity to exceed the limits of grip without it costing you a car.

I saw last night that the CUP2 is available in 265/35/18 now so I might try and run a stagared setup of 265/35/18 and 295/30/19 in the rear.

Wish APEX wheels had US prices in the EU!

[243Racing]

Originally Posted by Megator

You dont need 11s. I run 295/30/18 on 513M 18*10s as I said above. Tire seems happy on the rim. With no weird squirmyness.

@5.M0NSTER the issue with the ring in my eyes is that its not a learners track. Tracks like Assen or any big motorsports one are probably better as they give you the opportunity to exceed the limits of grip without it costing you a car.

I saw last night that the CUP2 is available in 265/35/18 now so I might try and run a stagared setup of 265/35/18 and 295/30/19 in the rear.

Wish APEX wheels had US prices in the EU!

I was concerned that the 30 sidewall would be too short, it's almost 2" shorter tire than the OEM rears...

Funny you mentioned that because just last night I was wondering if I could go up to a 19" rear wheel so I could go wider than 295 (lots more tire choices)..

[Megator]

Originally Posted by BeastieBombRacing

I was concerned that the 30 sidewall would be too short, it's almost 2" shorter tire than the OEM rears...

Funny you mentioned that because just last night I was wondering if I could go up to a 19" rear wheel so I could go wider than 295 (lots more tire choices)..

Yup the rear on my car is lower but so is the front by about 1cm (only due to the tires).

2 track days on this config and it seems fine. If I had coilovers I would raise the rear a tad to help with turn in (same grip as ever but a little less willing to rotate).

EDIT 305/30/19 would be perfect but maybe too wide for the arches??