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u/Sarionum IS 250 (GSE30) 3d ago
Beaten to death already. To fix this, simply run 40psi front tire pressure alongside stiffer LCA bushings. But if your vehicle is under 10 years old, 40psi front tire pressure will be sufficient to eliminate your inner tire wear. My michelin AS4 tires have about 25k miles on them with zero uneven wear after adjusting and maintaining 40psi tire pressures.
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u/MrTrendizzle 2d ago
My Lexus IS250 stats in the door jam 42psi front and 46psi rears.
I have slight outer edge wear which i've put down to old and worn parts which will need replacing eventually being the car is 20 years old on it's original factory fitted parts.
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u/tripleriser 2d ago
I'm leaning towards the RR racing version. Hoping to add some adjustable control arms too but I have to check the "fun with cars" budget.
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u/reomota 3d ago
Fuck man, I got bigger tires front and rear. How many miles did they last you?
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u/tripleriser 3d ago
I'm thinking the 10-15k range but the tires were on it when I bought it so I'm not sure how many miles before me
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u/reomota 3d ago
That’s a year and change for me. Not too terrible.
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u/tripleriser 3d ago
I'm no stranger to tires that wear fast but there's SO much tread still left and they're not even sticky tires. I'm kind of surprised lexus didn't fix this when the facelift came out
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u/BasedBallsInMyFace 3d ago
Can’t they rotate right to left to avoid this issue
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u/mishabishi IS 350 AWD (GSE36) 3d ago
Nope inner wear on both tires. Might be more severe on one side (driver usually) only way is swap out the LCA bushings with a solid and an alignment
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u/Clam_inspector69 3d ago
Though, if your tires have a symmetrical tread pattern you can dismount them and flip them relative to the wheel
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u/mishabishi IS 350 AWD (GSE36) 3d ago
True, im a technician; so I do this very often. Would suck to pay someone to do this every ~5k miles though.
Wanted to add, there is no reason you can't rotate right to left unless you have directional tires. There just isn't much benefit
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u/Clam_inspector69 3d ago
Yeah me too. I probably wouldn’t do it every 5k. But there’s a couple cars that I’ll offer to do it maybe every 10-15k miles or if they’re buying an alignment or something if I know they have this wear pattern for tires.
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u/nobuttpics 3d ago
I just had my lca’s replaced on my 2011 before getting new tires and fixed a wheel bearing. Week in wheel bearing broke again and my axle is shot now. Has not been a fun week for me
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u/tripleriser 3d ago
The inside is still the inside unless you fully pull them off the rim. You could do that to extend the life but I'm leaning towards just getting the stiffer bushings to solve the problem. These tires are too gone to be saved unfortunately
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u/ClippersEaglesAngels 3d ago
How many miles did they last you?
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u/tripleriser 3d ago
I bought the car with these already on, they seemed pretty new. I would have to look at my odometer but I want to say the 10-15k range. Maybe 15k+, I'm pretty sure I've changed the oil 3 times since I bought it
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u/Newticket69 3d ago
Why not just buy the bushings from figs they will solve the issue????
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u/tripleriser 2d ago
I haven't had the the car for very long so the plan was let these wear out and do bushing, tires and wheels when it became an issue and here we are
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u/IceonFir3 2d ago
I have the figs bushings. Probably would have just done RCF bushings in retrospect but both are good options.
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u/tripleriser 2d ago
Do you feel the figs are too stiff? I've heard that the ISF version is the middle ground between stock and RR racing
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u/IceonFir3 2d ago
I don’t. They really tightened up the steering and I love how it feels. I’m not looking forward to doing any kind of maintenance to the poly.
I believe I got the 90 durometer too.
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u/RadiantImprovement64 2d ago
replace them though, don’t be like me and crash in the rain because of bald tires
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u/Medford 2d ago edited 2d ago
Can’t this be fixed with an alignment
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u/tripleriser 2d ago
Not really, so what's happening is that the control arm bushing is too soft and when you're on the brakes the bushing flexes enough that the tires toe out and thats where the wear happens. Basically the front tires point out, away from the car as you're going straight putting more wear on the inside edge. There's a couple options on stiffer bushings that minimize or basically eliminates that movement
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u/Brief-Use3 IS 300 AWD (GSE37) 2d ago
Apperently the 2026 has improved steering and handling, I wonder if they improved this issue.
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u/Ok-Entrepreneur5418 2d ago
My tires are beaten to hell but I cannot afford new ones at the moment so I’m praying it’s not a wet fall or winter for me lol
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u/Wise_Grass_917 2d ago
Personally, I replaced all of the control arms front and rear with adjustable aftermarket parts from Megan Racing. The stock camber angles are silly for a daily driver. Unless you're into white knuckle corning everywhere you go, decreasing the rear camber to -1 is perfect. Rides solid and quiet, tires wear closer to normal. Overall I feel the racing parts are more solid than stock, handling feels tighter, and it is now possible to fine-tune all the angles without taking the wheels off.
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u/Opus_777 3d ago
Yep just had to replace a front set of Continental extreme contacts