Tire Wear Question
02-01-09, 01:22 PM
#1
Lead Lap
Thread Starter
Tire Wear Question
I have about 16,500 miles on my F...the rear tires will go close to 20,000 miles and overall, I'm happy with that. Today, I gave a quick look at my front tires and at first all looked great...there was probably 50% tread left. However, upon further inspection, the inside AND outside of the tires are completely worn (bald). I know the first thing you think is OVERinflation, but I religiously check the tire pressures and keep it right at manufacturer spec. Any ideas? It can't be camber b/c it's worn in and out, can it be toe or caster messing them up? Anyone else with this issue?
Peter
Peter
02-01-09, 07:21 PM
#5
Lead Lap
Thread Starter
My bad on the typo, sorry, I meant under inflated!!!!!! I am **** as hell when it comes to the car and always have it at the appropriate level...
Pat, call me...
Peter
Pat, call me...
Peter
02-02-09, 07:02 AM
#6
Lexus Test Driver
By you mentioning maufacturing spec you have the alignment check/done every couple months? You have a alignment issue going on or you are taking the corners pretty fast to tear them up. Tire inflation on those should be 36 psi in the fronts/rears. The IS250/350 Pressures are 34PSI front and 37PSI rear. AWD's are 35psi front and rear. The tires that are on the cars are designed to wear out bald around 30,000 miles the way the alignments are setup on these cars. Possibly change the tire to a higher mileage which would help ,but check out the alignment first.
Last edited by SHOLEXMAN; 02-02-09 at 08:31 AM. Reason: Wrong info...
02-02-09, 07:09 AM
#7
Tech Info Resource
iTrader: (2)
By you mentioning maufacturing spec you have the alignment check/done every couple months? You have a alignment issue going on or you are taking the corners pretty fast to tear them up. Tire inflation on those should be 34 psi in the fronts and 37 in the rears which also goes for the IS250/350 not for AWD those are 35psi front and rear. The tires that are on the cars are designed to wear out bald around 30,000 miles the way the alignments are setup on these cars. Possibly change the tire to a higher mileage which would help ,but check out the alignment first.
Trending Topics
02-02-09, 07:32 AM
#8
Lead Lap
Thread Starter
Agreed 100% Lance...I suppose it's my issue then and I might have gone some time with not enough air in the tires... 
Peter
Peter
02-02-09, 07:42 AM
#9
Pole Position
Peter,
As soon as I have a tire that is about 4# lower than the others (32 vs 36#) the TPI indicator comes on. It drives me crazy because I am usually looking at different things on the dash, gear selection in manual, mpg, etc. and the TPI indication always comes right back on display within seconds of looking at other indicators.
PM me with your telephone number. I didn't add your phone number to my Blackberry the last time we talked.
Pat
As soon as I have a tire that is about 4# lower than the others (32 vs 36#) the TPI indicator comes on. It drives me crazy because I am usually looking at different things on the dash, gear selection in manual, mpg, etc. and the TPI indication always comes right back on display within seconds of looking at other indicators.
PM me with your telephone number. I didn't add your phone number to my Blackberry the last time we talked.
Pat
02-02-09, 07:53 AM
#10
Lexus Test Driver
[QUOTE=lobuxracer;4216436]Umm. No. Factory spec for the F is 36 front and rear. It's on the sticker. I looked at it last night. Alignment will never wear inside AND outside edges at the same time.[/QUOTE
Sorry will edit the first part got the car mixed up in my head.
Other vehicles like the RX says to set tire pressure to 30PSI we don't do because the tire pressure light goes off at 29PSI so we set it to 35PSI .We don't go by some of the models recommended PSI because of that. Doesn't include the ISF. I didn't directly say that both alignment angles make both sides wear at the same time. I know that isn't possible only unless the person is taking corners hard and has the alignment issue at the same time. Under inflation is possible ,but they guy checks it all the time not so possible.
Sorry will edit the first part got the car mixed up in my head.
Other vehicles like the RX says to set tire pressure to 30PSI we don't do because the tire pressure light goes off at 29PSI so we set it to 35PSI .We don't go by some of the models recommended PSI because of that. Doesn't include the ISF. I didn't directly say that both alignment angles make both sides wear at the same time. I know that isn't possible only unless the person is taking corners hard and has the alignment issue at the same time. Under inflation is possible ,but they guy checks it all the time not so possible.
Last edited by SHOLEXMAN; 02-02-09 at 04:30 PM.
02-02-09, 07:57 AM
#11
Pole Position
Peter,
You did run your ISF at MSR last year didn't you? It is possible that at the high cornering speeds you were going at that time you wore some rubber off the outer edges. My experience is that the edges continue to wear as fast as the middle even though you have scrubbed off some of the outer edge rubber.
Pat
You did run your ISF at MSR last year didn't you? It is possible that at the high cornering speeds you were going at that time you wore some rubber off the outer edges. My experience is that the edges continue to wear as fast as the middle even though you have scrubbed off some of the outer edge rubber.
Pat
02-02-09, 11:30 AM
#12
Lexus Connoisseur
A characteristic of double wishbone suspensions are inner tire wear. All Lexus cars with double wishbone suspensions will do this. The geometry of the suspension allows the tires to camber in when loaded. Also, the lower you go, the more negative camber you will incur...so inner tire wear is going to be accellerated. It's been something i've come across in my 04 IS300 and 07 GS350, both driven with high mileage and both lowered as well.
02-02-09, 04:40 PM
#13
Lexus Test Driver
The new GS,IS,SC have some medium to bad alignment issues when they come into my work. Not because the person beat on it and also they have 23,000 miles or less and they have inner tire or outer tire wear problems. Like into the cords/ply at 20,000 theres something up with there newer suspension designs that isn't working well with the tires. The compound of the tires might make a difference ,but the alignment setup is more to blame. Even if the car doesn't have a alignment issue the average live of the tires is around 30,000. I have to recommend a alignment on like every 3rd newer GS,IS,SC. The service writers go tell the customer and there like what are serious?! lol
02-02-09, 05:51 PM
#14
Tech Info Resource
iTrader: (2)
A characteristic of double wishbone suspensions are inner tire wear. All Lexus cars with double wishbone suspensions will do this. The geometry of the suspension allows the tires to camber in when loaded. Also, the lower you go, the more negative camber you will incur...so inner tire wear is going to be accellerated. It's been something i've come across in my 04 IS300 and 07 GS350, both driven with high mileage and both lowered as well.
My IS350 at stock ride height only cooked the outer edges of my front tires because I drive hard around on ramps. If I could have dialed in one more degree of negative camber I probably wouldn't have had any issues at all. On my second set of tires (came with BS RE050, replaced with RE050A PP) I had no issues at all with wear.
FWIW, the tires on the IS shouldn't last more than 30k or so. I put 31k on mine, and at 59k, the second set was ready to be replaced. They were on the car when I traded it in.
02-02-09, 07:42 PM
#15
Lead Lap
Join Date: Feb 2008
Location: ca
Posts: 716
Likes: 0
Received 0 Likes
on
0 Posts
i am only seeing outside extreme tire wear. I have a feeling that the TOE is set in too much. I have 16k as well and seeing the same issue. Sending it to lexus but I want to have them give me the settings first and my have them pull the toe out some what to decrease tire wear.