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      04-26-2019, 02:43 PM   #23
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Quote:
Originally Posted by Dreamer99 View Post
Sounds like this will be my first and only set of RE71R's. I'm hoping to get 10 track days out of a set of streetable tires. What would be a better option, the RS4 or AD08R?
Your screen name is fitting

I have never gotten anywhere near 10 track days on a set of tires. Nor do I know anyone who has - I'm impressed the poster above got 8!. The reality is the longer a tire lasts, the less grip it will have.
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      04-26-2019, 03:27 PM   #24
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I squeaked out 6 track days from my OEM MPSS, but they're enormous and all 6 were at the same track that I know very well -- so I managed the tires.
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      04-26-2019, 03:38 PM   #25
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Quote:
Originally Posted by macdude357 View Post
Is that NT01's on the rear and NT05's on the front?
lmaoo fook. ninja edited now.

dparm this was in context of him saying "What I meant by streetable is at least street legal. I have a 100km drive to one of the tracks I go to."
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      04-26-2019, 04:54 PM   #26
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I would get about 7 days out of BFG R1s. I'm trying to think how many days I got out of the Hoosier R7.........maybe 5 or 6 (not sure).
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      04-26-2019, 05:17 PM   #27
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Quote:
Originally Posted by Dreamer99 View Post
What I meant by streetable is at least street legal. I have a 100km drive to one of the tracks I go to.
I drive many hundreds of miles to go to the track. RE71s still last 6 days.

Still the best streatable tire that is actually fast.
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      04-26-2019, 09:06 PM   #28
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Quote:
Originally Posted by slicer View Post
Your screen name is fitting

I have never gotten anywhere near 10 track days on a set of tires. Nor do I know anyone who has - I'm impressed the poster above got 8!. The reality is the longer a tire lasts, the less grip it will have.
This really speaks to a broader issue of realism. The OP needs to accept track days consume wearables. Tires, brake rotors and pads, etc. Tire wear as Parm aludes to can be managed but it can be a little frustrating you know you are leaving 2-3 seconds a lap in order to preserve wear, but choices are choices. You're not getting 10 days out of track tires unless they are rocks in the end.
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      04-27-2019, 03:14 AM   #29
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Quote:
Originally Posted by macdude357 View Post
I've had good tread life on my RS4's. Hard to say how many days exactly because I was swapping out with another set of wheels. That said, they discontinued the 275/35/18. So your choices are either the 265 or the 285. I think the 265 is too narrow. I ran them last year and they chunked on me in hotter weather. I'm currently using the 285 and like it a lot. We'll see if they chunk when the weather turns hot. I'm hoping the larger size will help with that (it's .8" wider than the 265).

The AD08R is an old tire and won't have the grip of the RS4. It's also really expensive ($384 for their 265/35/18). Looks like Tire Rack has a lot of older stock in some sizes which probably means it's being phased out in favor of the new AD052.
WTF why did they discontinue the 275 RS4!? I was planning to run these for at least a few sets.
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      04-27-2019, 02:01 PM   #30
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Link to my experience with RS-4s and other tires related to track wear and grip.

https://www.bimmerpost.com/forums/sh...php?p=24632850

Can someone confirm that Hankook discontinued production of the 275/35/18 RS-4? That makes no sense.
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      04-27-2019, 02:53 PM   #31
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Maybe the R-S5 is on the horizon. I know that others have mentioned how these things tend to show up in huge batches (on the freighters, probably) and then are suddenly unavailable for a long time.
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      04-27-2019, 04:55 PM   #32
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I hope so, but they only came out in '17 right?
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      04-27-2019, 06:56 PM   #33
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Quote:
Originally Posted by Bartledoo View Post
I hope so, but they only came out in '17 right?
It's a competitive segment though.
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      04-30-2019, 08:25 AM   #34
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Quote:
Originally Posted by dparm View Post
You're dragging the tire across the pavement which is causing that to happen. It's a symptom of incorrect tire pressure. I used to have the same problem until I bumped up my cold pressure by 1 or 2psi.
Quote:
Originally Posted by z3papa View Post
This happens on virtually every RE71R at onset. My guess is it doesn't help to have a camber limited from setup but no this is not unusual.
That results from understeer so could reduced by adding camber or maybe there is an alignment issue. If you add camber then maybe you won't understeer as much. Or maybe you do.

That wear is an indication you're exceeding the limits of the tire and beating it up.

I'm assuming that tire was on the front axle.
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      04-30-2019, 08:02 PM   #35
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Quote:
Originally Posted by bigjae1976 View Post
That results from understeer so could reduced by adding camber or maybe there is an alignment issue. If you add camber then maybe you won't understeer as much. Or maybe you do.

That wear is an indication you're exceeding the limits of the tire and beating it up.

I'm assuming that tire was on the front axle.
To be clear, first and foremost, I interpret dragging a tire across the surface to be a toe issue. As for my observation, I am running in FStreet SCCA which only allows for alignment pins pulled, which means insufficient camber up front. I get -1.6 to -1.8 side dependent. Give me -2.5 or more even, and I'd be really happy and you'd probably never see this wear.
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      04-30-2019, 08:47 PM   #36
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The picture is of a front tire and they both look like this. The rears have similar wear but not as much. -2.25 & -1.9 camber with zero toe up front and a little toe in at rear.
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      05-01-2019, 10:31 AM   #37
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Do you feel like you get understeer?
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      05-01-2019, 10:47 AM   #38
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Quote:
Originally Posted by dparm View Post
Do you feel like you get understeer?
I'm sure I get some understeer. One of my sessions I had an instructor in my car and he said I needed to be smoother on my turn in's.
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      05-01-2019, 11:25 AM   #39
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Quote:
Originally Posted by z3papa View Post
To be clear, first and foremost, I interpret dragging a tire across the surface to be a toe issue.
Could be but understeer essentially does the same thing except it's 3600lbs pushing the tire across the pavement. Really, comes down to generating too much heat and chunking the tire.

People wrongly assume sliding the rear wears your rear tires faster. It certainly doesn't help them last longer but it won't result in significantly more wear as long as you manage the heat you put in them. Sliding through every corner certainly will reduce treadlife.

Case in point, I can get the same 7-9 days from NT01s as everyone else.

Quote:
Originally Posted by Dreamer99 View Post
I'm sure I get some understeer. One of my sessions I had an instructor in my car and he said I needed to be smoother on my turn in's.
That's a clue.
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      05-01-2019, 11:43 AM   #40
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Yes it is a clue but I would have expected the wear to be on the outside tread block of the tire, not the middle one. Was wondering if it was too much pressure (38psi after cool-down lap).
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      05-01-2019, 12:04 PM   #41
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38psi hot does seem high given your cold/starting PSI. Makes me think you're putting too much heat into the tires, which would make sense if you're getting understeer and the instructor is telling you to improve your turn-in.

Full disclosure, I haven't had an M3 on track in over 2 years now so I can't remember exactly what mine used to do, but I don't remember ever seeing as high as 38 on the 255/275 setup.
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      05-01-2019, 12:31 PM   #42
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Quote:
Originally Posted by Dreamer99 View Post
Yes it is a clue but I would have expected the wear to be on the outside tread block of the tire, not the middle one. Was wondering if it was too much pressure (38psi after cool-down lap).
If you're 38psi after a cool down, you're higher than that during the session. Typically, I saw a 6 psi increase on my E90. Sometimes I'd get 8psi on the rears if I was doing a lot of sliding. If you're getting more than that then it's likely you're over driving the tires.
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      05-01-2019, 02:11 PM   #43
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Quote:
Originally Posted by bigjae1976 View Post
If you're 38psi after a cool down, you're higher than that during the session. Typically, I saw a 6 psi increase on my E90. Sometimes I'd get 8psi on the rears if I was doing a lot of sliding. If you're getting more than that then it's likely you're over driving the tires.
Okay, good, this confirms what I see even on my car. I start at 27-28 and end up around 34.

Have had a few sessions where it gets up around 36-37 and when I look at the telemetry, my inputs weren't smooth.
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      05-01-2019, 03:32 PM   #44
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Quote:
Originally Posted by bigjae1976 View Post

Case in point, I can get the same 7-9 days from NT01s as everyone else.
Damn, James, I can't get more than 4 days out of NT01s, and I know you like to slide as much as I do. What does your e46 weigh now? My car's at around 3550 + 220 with driver.

Hope to see you on the 3.1 this weekend.
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