MR2 Roadster Owners Club

The Workshop => Maintenance, Problems & Troubleshooting => Topic started by: pjp on January 20, 2014, 21:16

Title: Winter tyre wear / geometry check
Post by: pjp on January 20, 2014, 21:16
I shod my mr2 with Michelin Aplins all round at the end of October, hoping they would see me through the winter but the rear 215 45 16 tyres are now spent, that's not even three months usage and less than 5000 miles.
I enjoy driving the car (which is unmodified) and the tyres are brilliant on the wet roads but surely two sets of rear tyres per winter is a bit excessive.
I had a full geometry check and I was hoping someone on the forum could interpret the data for me to see if it reveals a problem other than my spirited driving.

Ta
Title: Re: Winter tyre wear / geometry check
Post by: pjp on January 20, 2014, 21:27
Rear Axle                                <--      -->|<--     -->

Total Toe                             +0'39'      +0'49'    +0'58'
Rear Toe Partial                   +0'20      +0'24'     +0'29'
Rear Camber                        -1'20       -0'45'      -0'10'    
Thrust Angle                        -0'15'      +0'00      +0'15'
Title: Re: Winter tyre wear / geometry check
Post by: trickyD on January 21, 2014, 09:14
Spirited driving will do it, plus driving when it's warm (15 degrees) just melts the compound.
Mine have stood up well.

They must have been used tyres, to wear in a season?
Title: Re: Winter tyre wear / geometry check
Post by: StuC on January 22, 2014, 12:54
Toyota specs for geometry: (from here (http://www.mr2roc.org/phpBB3/viewtopic.php?f=11&t=564&p=6956&hilit=rear+toe+geometry#p6956))

FRONT GEOMETRY

TOE:-                0° 09´ ±12´
Acceptable Range:-  -0° 03´ ->  0° 21´

----------
CAMBER:-             0° 47´ ±45´
Acceptable Range:-  -1° 32´ -> -0° 02´
L/R Error:-         30´ MAX
----------
CASTER:-             3° 08´ ±45´
Acceptable Range:-   2° 23´ ->  3° 53´
L/R Error:-         45´ MAX
----------
SAI:-               14° 52´ ±45´
Acceptable Range:-  14° 07´ -> 15° 37´
L/R Error:-         ********
----------
WHEEL ANGLE:-       38° 00´ ±2° 00´
Acceptable Range:-  36° 00´ -> 40° 00´

--------------------

REAR GEOMETRY

TOE:-                0° 18´ ±12´
Acceptable Range:-   0° 06´ ->  0° 30´
Individual Toe:-     0° 03´ ->  0° 15´

----------
CAMBER:-            -1° 05´ ±45´
Acceptable Range:-  -1° 50´ -> -0° 20´
L/R Error:-         45´ MAX
Title: Re: Winter tyre wear / geometry check
Post by: SilentMiaow on January 22, 2014, 17:32
Quote from: "StuC"Toyota specs for geometry: (from here (http://www.mr2roc.org/phpBB3/viewtopic.php?f=11&t=564&p=6956&hilit=rear+toe+geometry#p6956))

FRONT GEOMETRY

TOE:-                0° 09´ ±12´
Acceptable Range:-  -0° 03´ ->  0° 21´

----------
CAMBER:-             0° 47´ ±45´
Acceptable Range:-  -1° 32´ -> -0° 02´
L/R Error:-         30´ MAX
----------
CASTER:-             3° 08´ ±45´
Acceptable Range:-   2° 23´ ->  3° 53´
L/R Error:-         45´ MAX
----------
SAI:-               14° 52´ ±45´
Acceptable Range:-  14° 07´ -> 15° 37´
L/R Error:-         ********
----------
WHEEL ANGLE:-       38° 00´ ±2° 00´
Acceptable Range:-  36° 00´ -> 40° 00´

--------------------

REAR GEOMETRY

TOE:-                0° 18´ ±12´
Acceptable Range:-   0° 06´ ->  0° 30´
Individual Toe:-     0° 03´ ->  0° 15´

----------
CAMBER:-            -1° 05´ ±45´
Acceptable Range:-  -1° 50´ -> -0° 20´
L/R Error:-         45´ MAX

Does anyone happen to know if these settings are the same for JDM 2's?

I have had exactly the same problem with mine - new boots on 29th September, completely worn smooth now, after 5000 miles. I'm taking it back in for a full geometry check but the guy at the tyre place suggested I try and get the correct settings beforehand. He said it looked like it was toeing in, just on a visual inspection.
Title: Re: Winter tyre wear / geometry check
Post by: StuC on January 22, 2014, 17:35
Not sure why they would be different for JDM Imports.
Title: Re: Winter tyre wear / geometry check
Post by: pjp on January 23, 2014, 21:44
Thanks for the replies.
Is it worth having the geometry adjusted front and rear. The garage wants 100 quid.
Probably worth it if I keep ripping through Alpins at about 200 quid a corner.
The front tyres still look brand spankers.
Title: Re: Winter tyre wear / geometry check
Post by: trickyD on January 23, 2014, 22:02
Is the wear uneven? If not I'd argue it's probably your driving and the lack of really cold weather this year
Title: Re: Winter tyre wear / geometry check
Post by: james_gt3rs on January 24, 2014, 15:20
£200 a corner?! So you've burned through £400 worth of tyres in less than 5000 miles?   s:shock: :shock: s:shock:
Title: Re: Winter tyre wear / geometry check
Post by: trickyD on January 24, 2014, 19:41
There was a set on here for £150 I think (part worn)
I'm happy with my Falkens at about £70 a pop
Title: Re: Winter tyre wear / geometry check
Post by: ChrisGB on January 24, 2014, 21:03
Looks like to much toe at the rear. This would cause a elevated wear.
Title: Re: Winter tyre wear / geometry check
Post by: trickyD on January 24, 2014, 23:03
Also this might be helpful for anyone who needs rear Alpins (£130 for FL)
 m http://www.mytyres.co.uk/cgi-bin/rshop. ... eugart=ALL (http://www.mytyres.co.uk/cgi-bin/rshop.pl?s_p=Michelin-ALPIN-A4-215_45-R16-90H-XL&details=Ordern&typ=R-205182&cart_id=29762148.110.20324&ranzahl=4&Breite=215&Quer=45&Felge=16&weiter=0&kategorie=6&Ang_pro_Seite=20&Transport=P&dsco=110&sowigan=Wi&m_s=3&x_tyre_for=ALL&rsmFahrzeugart=ALL) m
I haven't checked the loading a or speed rating ...caveat emptor