Put on new rear tires, now my car handles terrible! WTF? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

996garage · 12-02-2014, 07:48 PM

So after 1.5 years of running with Continental ExtremeContact DW tires, my rears go bald. I change the rears only(with identical tires), and kept the fronts still had nearly 50% of tread left. Now my car handles like total crap with the rear end floating around like crazy causing the traction control to kick in all the time now.

Has anyone else ever experienced this? I've been driving for over 100 miles on the new rear tires, and they are still causing the traction control to activate all the time on fast corners. On freeway interchanges where I normally can drive 50mph, I can't drive more than 35mph without traction control flashing non-stop.

I already took it back to my shop to confirm they had the wheels balanced properly. Is it relatively common for new tires to require a long break-in period, or is there anything particular with the BRZ/FRS balance when just changing rear tires?

I should add that I'm running a staggered wheel setup on Work Emotion Kiwami's 245/35-18 rears & 225/40-18 fronts, & KWv3 coilovers. (My BRZ basically looks exactly like this Chargespeed car) Thanks for any advice.

Tcoat · 12-02-2014, 07:50 PM

Same tires as on it before?

YangerD · 12-02-2014, 08:00 PM

I personally would have went with 4 identical tires, but I dunno if that would have helped you in your case. Sure the balance all is in check right?

ashtray · 12-02-2014, 08:01 PM

Your back tires are taller than your front. Were your last set of rear tires that way too?

FlamingRectumSyndrome · 12-02-2014, 08:07 PM

Ummm... what kind of tires did you buy? If you got some all-season radials with a 60,000 mile wear rating they're not going to stick like a good UHP tire.

eddieflyinv · 12-02-2014, 08:11 PM

Quote:

Originally Posted by ashtray

Your back tires are taller than your front. Were your last set of rear tires that way too?

this, our traction control thinks all our tires are the same total diameter,
idn how far out f&r have to be from each other to confuse the system though

http://www.1010tires.com/Tools/Tire-Size-Calculator <- could enter the sizes there to see how far out they are exactly

FirestormFRS · 12-02-2014, 08:23 PM

Give the rears time to lose the grease from the newness then try again. I had the same problem with a new set of S04's but after a few weeks they started holding like I expected.

996garage · 12-02-2014, 08:47 PM

Thanks for all the input. I should clarify that I replaced the rear tires with the identical brand & size tires as before.

Sorry, I stated the incorrect profile for the fronts... they are actually:
Front - 18x8.5 +38 with 225/40 tires
Rear - 18x9.5 +38 with 245/35 tires
(corrected original post)

These tires are Max Performance Summer Tires:
http://www.tirerack.com/tires/tires....remeContact+DW

Since I've double checked everything, I'm crossing my fingers that it just has a very long break-in period before the new tires start gripping like the worn-in fronts do. Maybe it's time to start doing burnouts!

VakaGT · 12-02-2014, 08:53 PM

well its winter now...

Tcoat · 12-02-2014, 09:27 PM

Quote:

Originally Posted by VakaGT

well its winter now...

Not yet it aint. Oh god not yet!!!!!!!

navanodd · 12-02-2014, 09:33 PM

I found it took nearly 1000 km of driving on my Xi3's before they gripped the way I expected. ABS kicked in stopping normally for a crosswalk on the way home from the tire shop it was so bad at first.

BlaineWasHere · 12-03-2014, 01:05 AM

New tires don't stick well. And it's never winter in California!

904FRSlow · 12-03-2014, 01:10 AM

Go burn some tire

LXXXV1 · 12-03-2014, 01:30 AM

50% in the front? Either you're forgetting to rotate or you're having way too much fun...

12-02-2014, 07:48 PM	#1
996garage Senior Member Join Date: Jun 2012 Drives: 03' NSX & 13' BRZ 6spd Ltd white Location: LA Posts: 108 Thanks: 8 Thanked 40 Times in 21 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Put on new rear tires, now my car handles terrible! WTF? So after 1.5 years of running with Continental ExtremeContact DW tires, my rears go bald. I change the rears only(with identical tires), and kept the fronts still had nearly 50% of tread left. Now my car handles like total crap with the rear end floating around like crazy causing the traction control to kick in all the time now. Has anyone else ever experienced this? I've been driving for over 100 miles on the new rear tires, and they are still causing the traction control to activate all the time on fast corners. On freeway interchanges where I normally can drive 50mph, I can't drive more than 35mph without traction control flashing non-stop. I already took it back to my shop to confirm they had the wheels balanced properly. Is it relatively common for new tires to require a long break-in period, or is there anything particular with the BRZ/FRS balance when just changing rear tires? I should add that I'm running a staggered wheel setup on Work Emotion Kiwami's 245/35-18 rears & 225/40-18 fronts, & KWv3 coilovers. (My BRZ basically looks exactly like this Chargespeed car) Thanks for any advice. Last edited by 996garage; 12-02-2014 at 08:48 PM.

12-02-2014, 07:50 PM	#2
Tcoat Senior Member Join Date: Jul 2014 Drives: 2020 Hakone Location: London, Ont Posts: 69,841 Thanks: 61,656 Thanked 108,295 Times in 46,456 Posts Mentioned: 2499 Post(s) Tagged: 50 Thread(s)	Same tires as on it before? __________________ Racecar spelled backwards is Racecar, because Racecar.

12-02-2014, 08:53 PM	#9
VakaGT Senior Member Join Date: Feb 2014 Drives: None Location: Tracy, CA Posts: 629 Thanks: 121 Thanked 133 Times in 74 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	well its winter now... __________________ My Build Thread Instagram: neel.vaka

12-03-2014, 01:05 AM	#12
BlaineWasHere Grip>Drift Join Date: Jun 2012 Drives: FRS Location: NorCal Posts: 3,472 Thanks: 782 Thanked 1,749 Times in 918 Posts Mentioned: 53 Post(s) Tagged: 2 Thread(s)	New tires don't stick well. And it's never winter in California! __________________ My FR-S Build Thread!

12-03-2014, 01:30 AM	#14
LXXXV1 Senior Member Join Date: Feb 2014 Drives: 2014 FR-S Monogram, Whiteout 6MT Location: 626, Socal Posts: 593 Thanks: 469 Thanked 408 Times in 230 Posts Mentioned: 37 Post(s) Tagged: 0 Thread(s)	50% in the front? Either you're forgetting to rotate or you're having way too much fun... __________________ 2007 Honda CBR600RR-Pearl White/Silver - Totaled 2014 Scion FR-S Monogram-Whiteout - #LXXXV1 (build) φφκα

12-02-2014, 08:00 PM	#3
YangerD Senior Member Join Date: Feb 2012 Drives: 2017 Toyota 86 Location: Toronto Posts: 187 Thanks: 159 Thanked 55 Times in 48 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	I personally would have went with 4 identical tires, but I dunno if that would have helped you in your case. Sure the balance all is in check right?

12-02-2014, 08:01 PM	#4
ashtray As Seen On The Internet Join Date: Apr 2011 Drives: 2003 WRX, 2013 BRZ, 442 Location: SoCal Posts: 852 Thanks: 23 Thanked 251 Times in 159 Posts Mentioned: 1 Post(s) Tagged: 2 Thread(s)	Your back tires are taller than your front. Were your last set of rear tires that way too?

12-02-2014, 08:07 PM	#5
FlamingRectumSyndrome Shriveled Old Member Join Date: Apr 2014 Drives: 14 Hot Lava FR-S Location: Central California Posts: 179 Thanks: 49 Thanked 176 Times in 81 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Ummm... what kind of tires did you buy? If you got some all-season radials with a 60,000 mile wear rating they're not going to stick like a good UHP tire.

12-02-2014, 08:23 PM	#7
FirestormFRS Senior Member Join Date: Jul 2012 Drives: 2013 FR-S Location: Anytown Posts: 920 Thanks: 73 Thanked 643 Times in 302 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	Give the rears time to lose the grease from the newness then try again. I had the same problem with a new set of S04's but after a few weeks they started holding like I expected.

12-02-2014, 08:47 PM	#8
996garage Senior Member Join Date: Jun 2012 Drives: 03' NSX & 13' BRZ 6spd Ltd white Location: LA Posts: 108 Thanks: 8 Thanked 40 Times in 21 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Thanks for all the input. I should clarify that I replaced the rear tires with the identical brand & size tires as before. Sorry, I stated the incorrect profile for the fronts... they are actually: Front - 18x8.5 +38 with 225/40 tires Rear - 18x9.5 +38 with 245/35 tires (corrected original post) These tires are Max Performance Summer Tires: http://www.tirerack.com/tires/tires....remeContact+DW Since I've double checked everything, I'm crossing my fingers that it just has a very long break-in period before the new tires start gripping like the worn-in fronts do. Maybe it's time to start doing burnouts!

12-02-2014, 09:33 PM	#11
navanodd Senior Member Join Date: Nov 2013 Drives: 2013 BRZ Sport-tech WRB Location: Nova Scotia Posts: 308 Thanks: 95 Thanked 171 Times in 102 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	I found it took nearly 1000 km of driving on my Xi3's before they gripped the way I expected. ABS kicked in stopping normally for a crosswalk on the way home from the tire shop it was so bad at first.

12-03-2014, 01:10 AM	#13
904FRSlow Senior Member Join Date: May 2014 Drives: '13 FR-S Whiteout Location: Saint Augustine Posts: 304 Thanks: 39 Thanked 88 Times in 59 Posts Mentioned: 2 Post(s) Tagged: 2 Thread(s)	Go burn some tire

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