Unusual Tire Wear - Test - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

xdavidx · 10-10-2019, 02:09 PM

Just got my 86 serviced and the dealer noted with confusion that my front tires were significantly more worn than my rear. They had not been rotated. Who knows why?

DarkPira7e · 10-10-2019, 02:16 PM

Rear tires get changed much more frequently than the fronts ,and you have scrubbing from toe out for turn on response?

This is my final answer. Definitely am expecting increased wear from autocross usage - I know my fronts get hammered quick compared to the rears

Leonardo · 10-10-2019, 02:21 PM

Your alignment is off?

ZDan · 10-10-2019, 02:24 PM

I suspect track or autoX use + possibly sub-optimal setup.

My car wears fronts WAY more quickly than rears at the track. But my setup is not optimal... Bottoming on cut-down front bump stops results in heavily loading the outside front in corners. Lost a ton of front bump travel due to camber plates and -1.25" ride height with springs...

TunaNoCrust · 10-10-2019, 04:07 PM

Quote:

Originally Posted by ZDan

My car wears fronts WAY more quickly than rears at the track

I think I know why

PS, I am bringing the Motive Bleeder cap from my Porsche up to NHMS if you didn't get one already.

ZDan · 10-10-2019, 04:21 PM

Quote:

Originally Posted by TunaNoCrust

I think I know why

PS, I am bringing the Motive Bleeder cap from my Porsche up to NHMS if you didn't get one already.

Thanks man, I got it yestiddy but haven't trial-fitted it yet...

strat61caster · 10-10-2019, 04:21 PM

I too fail to achieve 'slow in, fast out' far too often.

xdavidx · 10-10-2019, 04:29 PM

Quote:

Originally Posted by ZDan

I suspect track or autoX use + possibly sub-optimal setup.

My car wears fronts WAY more quickly than rears at the track.

Correct! No power and understeer (no front camber adjustment), the fronts get lots of abuse and the rears get very little.

I found it kind of funny that the service techs didn't recognize why.. I mean my RE-71rs look like I put a blow torch to them they are so melted... Can't imagine I am the only 86 that comes in this way.

Leonardo · 10-10-2019, 04:42 PM

Quote:

Originally Posted by xdavidx

Correct! No power and understeer (no front camber adjustment), the fronts get lots of abuse and the rears get very little.

I found it kind of funny that the service techs didn't recognize why.. I mean my RE-71rs look like I put a blow torch to them they are so melted... Can't imagine I am the only 86 that comes in this way.

For what those tires cost, wouldn't a set of camber bolts be a no-brainer? Or are class regulations keeping you from modifying your suspension?

xdavidx · 10-10-2019, 04:46 PM

Quote:

Originally Posted by Leonardo

For what those tires cost, wouldn't a set of camber bolts be a no-brainer? Or are class regulations keeping you from modifying your suspension?

I have a set of camber bolts in the glove box.... Doesn't seem to help

Leonardo · 10-10-2019, 05:00 PM

Quote:

Originally Posted by xdavidx

I have a set of camber bolts in the glove box.... Doesn't seem to help

Cool!

I have tried camber bolts in the bottom hole, top hole, and both holes on the strut; I haven't tried them in the glove box.

How much camber do you get from them in that location?

strat61caster · 10-10-2019, 05:09 PM

Quote:

Originally Posted by xdavidx

Correct! No power and understeer (no front camber adjustment), the fronts get lots of abuse and the rears get very little.

I found it kind of funny that the service techs didn't recognize why.. I mean my RE-71rs look like I put a blow torch to them they are so melted... Can't imagine I am the only 86 that comes in this way.

The upside to swapping between DD and autox tires - every event gets a rotation.

I'm still wearing the fronts faster with -4° but that's a nut behind the wheel problem... well at least my setup changes haven't moved the needle a bunch yet.

ZDan · 10-10-2019, 06:32 PM

Quote:

Originally Posted by xdavidx

Correct! No power and understeer (no front camber adjustment), the fronts get lots of abuse and the rears get very little.

Not to mention 55/45 weight distribution! Doesn't seem that terrible until you realize that the fronts carry ~20% more weight than the rears do

There should be a cab-rearward 2-seat version of this car, with rear wheels shoved about 10"-12" forward for 50/50 distribution!

xdavidx · 10-10-2019, 08:49 PM

Quote:

Originally Posted by Leonardo

Cool!

I have tried camber bolts in the bottom hole, top hole, and both holes on the strut; I haven't tried them in the glove box.

How much camber do you get from them in that location?

I only get about -0.0000000000000000000000001 due to a slightly lower ride height from the added weight.

Have noticed a strange rattling noise coming from the glove box though ever since I put them in. Super easy install though.

10-10-2019, 02:09 PM	#1
xdavidx Emperor McDuck Join Date: Sep 2018 Drives: 2019 86 GT; 2018 BMW S1000RR Location: Pasadena, CA Posts: 275 Thanks: 131 Thanked 293 Times in 135 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Unusual Tire Wear - Test Just got my 86 serviced and the dealer noted with confusion that my front tires were significantly more worn than my rear. They had not been rotated. Who knows why? __________________ Instagram: @s1kmotodragon YouTube: S1KMotoDragon

10-10-2019, 02:16 PM	#2
DarkPira7e Rust bucket enthusiast Join Date: Feb 2017 Drives: 2013 Turbo Firestorm FRS Location: Vermont Posts: 4,063 Thanks: 3,323 Thanked 4,210 Times in 2,116 Posts Mentioned: 33 Post(s) Tagged: 0 Thread(s)	Rear tires get changed much more frequently than the fronts ,and you have scrubbing from toe out for turn on response? This is my final answer. Definitely am expecting increased wear from autocross usage - I know my fronts get hammered quick compared to the rears Last edited by DarkPira7e; 10-10-2019 at 02:26 PM.

10-10-2019, 02:21 PM	#3
Leonardo Country Boy 4 Life Join Date: Jul 2012 Drives: 19' & 06' Ridgelines, 13' FR-S Location: EUGENE Posts: 5,228 Thanks: 6,719 Thanked 5,293 Times in 2,720 Posts Mentioned: 47 Post(s) Tagged: 1 Thread(s)	Your alignment is off? __________________ I LIKE TIRES!

10-10-2019, 02:24 PM	#4
ZDan Senior Member Join Date: May 2011 Drives: '23 BRZ Location: Providence, RI Posts: 4,672 Thanks: 1,439 Thanked 4,012 Times in 2,098 Posts Mentioned: 85 Post(s) Tagged: 0 Thread(s)	I suspect track or autoX use + possibly sub-optimal setup. My car wears fronts WAY more quickly than rears at the track. But my setup is not optimal... Bottoming on cut-down front bump stops results in heavily loading the outside front in corners. Lost a ton of front bump travel due to camber plates and -1.25" ride height with springs... Last edited by ZDan; 10-10-2019 at 02:41 PM.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
How does my tire wear look?	R_E_L	Wheels \| Tires \| Spacers \| Hub -- Sponsored by The Tire Rack	14	09-08-2018 08:34 AM
tire wear	oppiee	Tracking / Autocross / HPDE / Drifting	9	08-29-2017 01:55 PM
Tire Wear?	Flo	Wheels \| Tires \| Spacers \| Hub -- Sponsored by The Tire Rack	12	01-10-2017 04:19 PM
Tire Wear Help	babykwiss	Tracking / Autocross / HPDE / Drifting	10	07-14-2014 12:31 PM
Unusual tyre wear? (pics included)	jourdanc	Wheels \| Tires \| Spacers \| Hub -- Sponsored by The Tire Rack	11	05-09-2014 07:34 AM

User Name		Remember Me?
Password