Tires turned blue - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

MassTroy · 09-09-2017, 01:34 AM

I took my car to the track 2 weeks ago 6 session of 25 minutes each at Blackhawk Farms over 2 days. I drove the car home and aside from 2 short trips (15-20 minutes) the car has sat since then. Today when I went out to the car I noticed the outer shoulders of all 4 tires seem to be blue. Supposedly this can happen sometimes after high heat in the tires.

Has anyone else seen this with their tires? Does anybody know what exactly causes it? I'm really curious more than concerned.

Tires are RE71R

Clipdat · 09-09-2017, 01:40 AM

This is caused by the scientific fact that RE71Rs are fucking badass tires.

Quote:

Originally Posted by MassTroy

I took my car to the track 2 weeks ago 6 session of 25 minutes each at Blackhawk Farms over 2 days. I drove the car home and aside from 2 short trips (15-20 minutes) the car has sat since then. Today when I went out to the car I noticed the outer shoulders of all 4 tires seem to be blue. Supposedly this can happen sometimes after high heat in the tires.

Has anyone else seen this with their tires? Does anybody know what exactly causes it? I'm really curious more than concerned.

Tires are RE71R

Mr.ac · 09-09-2017, 01:44 AM

It's common. Just basic heat wear. Power sliding much? Lol
My guess, breaking too late while trying to turn.

MassTroy · 09-09-2017, 01:54 AM

Quote:

Originally Posted by Mr.ac

It's common. Just basic heat wear. Power sliding much? Lol
My guess, breaking too late while trying to turn.

Can you really narrow down what my driving style is based on the pattern of blue? I certainly wasn't taking it like a drift course, but maybe a tiny bit of angle. The blue pattern seems to be pretty even front to back and left to right (blackhawk is primarily a right hand course but with a long left sweeper at turn 5).

Ultramaroon · 09-09-2017, 02:48 AM

so much sticky

Clipdat · 09-09-2017, 02:53 AM

TWSS

Quote:

Originally Posted by Ultramaroon

so much sticky

Ultramaroon · 09-09-2017, 03:13 AM

Quote:

Originally Posted by Clipdat

TWSS

Tcoat · 09-09-2017, 03:29 AM

I have never been a track guy but did a pile of drag racing back in the 70s. It is much more impressive when you can manage to get the whole tread (or more accurately, where the tread should be) blue!

Spuds · 09-09-2017, 05:49 PM

Quote:

Originally Posted by MassTroy

Can you really narrow down what my driving style is based on the pattern of blue? I certainly wasn't taking it like a drift course, but maybe a tiny bit of angle. The blue pattern seems to be pretty even front to back and left to right (blackhawk is primarily a right hand course but with a long left sweeper at turn 5).

As I understand it, braking pulls camber out of the rear due to the suspension geometry and when you turn the contact patch moves out to the side more than usual because of the decreased camber angle, thus why the outside edge heats up under those conditions.

wparsons · 09-09-2017, 08:50 PM

Quote:

Originally Posted by Spuds

As I understand it, braking pulls camber out of the rear due to the suspension geometry and when you turn the contact patch moves out to the side more than usual because of the decreased camber angle, thus why the outside edge heats up under those conditions.

Not really... it's the outer edges because of heat from cornering loads.

OP, this is completely normal if you're actually getting heat into the tires. You'll also notice the rubber looks very different between the running surface and the sidewall after a good track day.

B T · 09-12-2017, 02:56 PM

Completely normal. Looks like you may need to increase the air in that tire though, that's a good bit of rollover to the sidewall.

brewdad16 · 09-12-2017, 03:44 PM

You maybe sliding that tire / that end of the car excessively. That's a lot of heat to change the color. Only time I've seen that on my own cars I was overdriving. YMMV though, if your instructor or data or whatever seems to indicate you're doing fine, that's cool

Icecreamtruk · 09-12-2017, 04:52 PM

My RS4 tires have this, all 4 of them, almost all of the contact patch has it except for a tiny wit bit in the middle of it (guess I may be running pressures too low after all). My nittos never turned blue tho, so there is certainly some magic to this "street" tires that makes them stick as much as a "slick" tire (nittos and maxxis, which arent really slicks, no more than street tires are at least).

wparsons · 09-12-2017, 08:22 PM

Quote:

Originally Posted by B T

Completely normal. Looks like you may need to increase the air in that tire though, that's a good bit of rollover to the sidewall.

Or more camber... especially if it's a front tire.

09-09-2017, 01:44 AM	#3
Mr.ac [insert cool phrase here] Join Date: Aug 2015 Drives: BRZ Premium Location: Central Coast CA Posts: 2,369 Thanks: 709 Thanked 1,558 Times in 930 Posts Mentioned: 30 Post(s) Tagged: 0 Thread(s)	It's common. Just basic heat wear. Power sliding much? Lol My guess, breaking too late while trying to turn. __________________ New daily driver - Subaru BRZ Premium Weekend fun/track car - '91 MR2 Turbo Gen3 Old daily driver - '88 MR2 Supercharged

09-09-2017, 02:48 AM	#5
Ultramaroon 義理チョコ Join Date: Sep 2014 Drives: a 13 e8h frs Location: vantucky, wa Posts: 31,868 Thanks: 52,130 Thanked 36,519 Times in 18,920 Posts Mentioned: 1106 Post(s) Tagged: 9 Thread(s)	so much sticky __________________ service manuals

09-09-2017, 03:29 AM	#8
Tcoat Senior Member Join Date: Jul 2014 Drives: 2020 Hakone Location: London, Ont Posts: 69,845 Thanks: 61,656 Thanked 108,283 Times in 46,456 Posts Mentioned: 2495 Post(s) Tagged: 50 Thread(s)	I have never been a track guy but did a pile of drag racing back in the 70s. It is much more impressive when you can manage to get the whole tread (or more accurately, where the tread should be) blue! __________________ Racecar spelled backwards is Racecar, because Racecar.

09-12-2017, 03:44 PM	#12
brewdad16 Junior Member Join Date: Sep 2017 Drives: currently shopping Location: Katy, TX Posts: 5 Thanks: 0 Thanked 5 Times in 2 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	You maybe sliding that tire / that end of the car excessively. That's a lot of heat to change the color. Only time I've seen that on my own cars I was overdriving. YMMV though, if your instructor or data or whatever seems to indicate you're doing fine, that's cool __________________ FRS/BRZ Shopper - for SCCA autox SSC class prior fun cars: 2010 RX8 R3, 2012 C6Z06, 1994 MR2 track car, 1991 MR2 street car, 1989 Fox Mustang

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09-12-2017, 02:56 PM	#11
B T Senior Member Join Date: May 2015 Drives: 15 BRZ, 2003 MR2, '70 Elky, 06 TBSS Location: Mobile, Alabama Posts: 510 Thanks: 194 Thanked 200 Times in 142 Posts Mentioned: 7 Post(s) Tagged: 0 Thread(s)	Completely normal. Looks like you may need to increase the air in that tire though, that's a good bit of rollover to the sidewall.

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