IS F (2008-2014) Discussion topics related to the IS F model

Tire Wear Question

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Old 02-12-09, 09:16 PM
  #31  
flowrider
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Originally Posted by IS-Fast!
From my personal experience the PS2's will wear much faster than the Potenzas! The PS2s are much better, but not justifiable IMHO for street driving only.
The UTQG wear rating for the Bridgestones is 140 for the Michelins it's 220.

Lou
Old 02-12-09, 11:46 PM
  #32  
lobuxracer
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Originally Posted by lowrideraz
The UTQG wear rating for the Bridgestones is 140 for the Michelins it's 220.

Lou
Comparing across manufacturers is usually pointless. The numbers aren't traceable to a repeatable standard.
Old 02-13-09, 07:03 AM
  #33  
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Originally Posted by lobuxracer
Comparing across manufacturers is usually pointless. The numbers aren't traceable to a repeatable standard.
Your right, and I usually agree. But with such a gross difference, it's certainly worth looking at.

Lou
Old 02-16-09, 03:47 PM
  #34  
stash84
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ive had my is350 for about 2 years. the first set of front tires needed to be replaced at around 20k because of inside tire wear. i took my car to an alignment specialist and he informed me that most lexus' have the "camber" set a certain way and it causes the inside of the tire to wear. i bought new tires and had him align it correctly (not lexus spec) and the tires are wasting evenly so far. ive also taken it easy around turns but not a major change. Anyways, today, i noticed the same problem Houston is having with the inside and outside wear on my ISF. i actually had 42psi on my front tires ! the rest of the tire looks great (more than 50% life left). i have an appt tomorrow to get the "camber" adjusted (i have no clue what that is) and it seems to be the problem with these cars. he also says that the car is not going to handle as good but the tires will wear evenly, like they do in my 350. Anyone have any good tire recommendations???
Old 02-16-09, 08:17 PM
  #35  
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Originally Posted by stash84
ive had my is350 for about 2 years. the first set of front tires needed to be replaced at around 20k because of inside tire wear. i took my car to an alignment specialist and he informed me that most lexus' have the "camber" set a certain way and it causes the inside of the tire to wear. i bought new tires and had him align it correctly (not lexus spec) and the tires are wasting evenly so far. ive also taken it easy around turns but not a major change. Anyways, today, i noticed the same problem Houston is having with the inside and outside wear on my ISF. i actually had 42psi on my front tires ! the rest of the tire looks great (more than 50% life left). i have an appt tomorrow to get the "camber" adjusted (i have no clue what that is) and it seems to be the problem with these cars. he also says that the car is not going to handle as good but the tires will wear evenly, like they do in my 350. Anyone have any good tire recommendations???
Adjust the camber? Really? How about - that's a flagrant lie. There is no camber adjustment on any RWD 2IS unless you buy the Megan suspension pieces. There are special bushings you can buy if your car doesn't meet factory spec, but your problem isn't going to be solved with camber anyway.
Old 02-16-09, 11:03 PM
  #36  
rominl
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Originally Posted by lobuxracer
Adjust the camber? Really? How about - that's a flagrant lie. There is no camber adjustment on any RWD 2IS unless you buy the Megan suspension pieces. There are special bushings you can buy if your car doesn't meet factory spec, but your problem isn't going to be solved with camber anyway.
agree, camber is not adjustable on any 2is and 3gs.

that's why i also questioned chrisburke's post in #21 about positive camber. i'd be surprised if lexus put hard positive camber in the front?
Old 02-17-09, 09:09 AM
  #37  
houstonT
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The only plausible explanation is underinflation, which I know is NOT the case on my car as I'm very picky about checking my tire pressures... I always have them set to 36 f/r cold.
Peter
Old 02-18-09, 09:11 PM
  #38  
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Adjust the camber? Really? How about - that's a flagrant lie.

Whoa...calm down..like i said before..i have no idea what these things are yet but i was mistaken. it has to do with the "toe". what i do know is that my 350 doesnt wear the inside anymore and my isf does
Old 02-18-09, 09:15 PM
  #39  
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Originally Posted by chrisburke
And for your info I just got back from the dealer and there settings for the F is set so the front has Positive camber. Therefore the front outter tread wears faster.
This is complete hogwash. No modern car has positive camber. See attached for IS-F alignment specs: (Also note the toe in specified at the rear is identical to the MkIV Supra spec, and I found it to be an inside edge killer so I came up with these specs.)
Attached Thumbnails Tire Wear Question-isf-alignment.gif  
Old 02-19-09, 12:24 PM
  #40  
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Looks like someone at the service department is telling stories. Definitely no such thing as positive camber, especially on the F. Positive camber will give really terrible handling abilities.
Old 02-19-09, 06:25 PM
  #41  
IS-Fast!
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I have 3k miles on my current Bridgestones, and currently there is no uneven wear on the tires. Is there anything I can do to prevent the inside tire wear? Should I request different specs?
Old 02-19-09, 11:13 PM
  #42  
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Originally Posted by IS-Fast!
I have 3k miles on my current Bridgestones, and currently there is no uneven wear on the tires. Is there anything I can do to prevent the inside tire wear? Should I request different specs?
No, just drive the car and check it every 3k or so to see if it is developing an issue. If it is, take it to someone with a clue, not just a computerized rack, and have them take out a millimeter of toe.
Old 08-23-10, 07:44 PM
  #43  
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Just wanted to make sure we're all on the same page, it's the toe, NOT camber that's causing uneven (interior front tire wear) on most of us?

I really think Lexus should let F owners know about this tendency early on and give them the option for a free LESS toe out alignment! This is absurd to have to replace tires with all kinds of tread left everywhere else, no?
Old 08-23-10, 10:50 PM
  #44  
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It's the toe. Camber isn't usually a problem until you exceed -2.5 degrees. Mine came from the factory at -1.0. I run my Supra at -1.5 on all four corners without any wear issues at all.

Get the toe right and all will be well.

It seems there's a LOT of variability in the factory's alignment for the 2IS models. My 350 wore tires perfectly except for my driving. My F has not, despite my driving.
Old 08-25-10, 09:57 AM
  #45  
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Originally Posted by lobuxracer
It's the toe. Camber isn't usually a problem until you exceed -2.5 degrees. Mine came from the factory at -1.0. I run my Supra at -1.5 on all four corners without any wear issues at all.

Get the toe right and all will be well.

It seems there's a LOT of variability in the factory's alignment for the 2IS models. My 350 wore tires perfectly except for my driving. My F has not, despite my driving.
Have you done many adjustments on alignment to your F to prevent abnormal wear?


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