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Old 02-22-2004, 06:56 PM   #1
Scooby Specialist
Member#: 9193
Join Date: Aug 2001
Location: California
2002 WRX

Default My Falken Azenis tires have uneven threadwear

Hello everyone, I am currently running 17x7 buddy club wheels with Falken Azenis tires. My question is, why is it that my tires have uneven threadwear? Both sidewall are wearing out like crazzy but the middle part of the tires are almost perfect...
Some people said that I ran the tire pressure too low which is 36-39 psi daily. The max PSI per tires I believe is 51 PSI (listed on the tire), so how many psi most subies with 17" wheels running?

I've had these tires for over a year, and negative camber is not much at all since I only have Tein H-tech springs.
I wish I have a digital camera to take a clear picture, but this is how it looks like if you are facing the tire directly:

**-------------** <----- top part of the tire
**-------------** <----- bottom part @ ground level

Well thats my creative drawing of one tire Basically the dash part of the tires have very low tire wear, while the * sections are worn out pretty good. Any ideas?

Thanks in advance
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Old 02-22-2004, 07:16 PM   #2
Scooby Newbie
Member#: 29741
Join Date: Nov 2002

if the ouside of the tire thread is worn, i would think it is a to low tire pressure issue.
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Old 02-22-2004, 07:45 PM   #3
Scooby Specialist
Member#: 10279
Join Date: Sep 2001
Location: St. Louis, MO
2005 Lotus Elise
Yellow, #94 SS


Weird. It does look like wear from low tire pressure, but 36-39psi should easily be enough to give you even wear. If you always used the same pressure gauge, I would try a different one, just to be sure that it's accurate.

The only other thing I can think of is that you might be wearing the inside edges as a result of toe-out, and the outside edges from hard driving with too little camber. You may want to get your alignment checked if you haven't done that lately.
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Old 02-22-2004, 08:36 PM   #4
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Member#: 9193
Join Date: Aug 2001
Location: California
2002 WRX


thanks for the reply!

thewrx - I've only been to 1 trackday with these tires, and I have to admit that the two front tires have considerable wear compared to the rear after that day which was 6 months ago. Ever since then, I have not taken any hard cornering at all on public road. As for allignment, I had the dealer alligned it to normal spec during my 30k service with a little bit of camber in the front and rear.

Also, what's weird was at the track I ran 35 psi which jumped to about 39-40 psi after my first run, however, the middle part indicated above have very minimal wear and I'm riding so much on the sidewall. I do know that azenis have stiff sidewall, but why the uneven wear? It means that I'm not using the full capacity of the azenis judging by the low threadwear in the middle..

Is it safe for me to bump the PSI to 42 for daily drive?
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Old 02-23-2004, 10:03 AM   #5
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Member#: 26662
Join Date: Oct 2002
Location: Jamacia Plain, MA
2002 WRX sport wagon
WR Blue


I run 43/42 F/R on my Azenis daily. Autocross is about the same, maybe a little bit more (I play with pressures a bit, still haven't found something I love). Haven't got to the wear bar, so I don't know how evenly mine are wearing.

Is it safe? Can't tell you for sure, but I am doing it and it is less than the max rated for the tire, so I wouldn't foresee any problems.
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Old 02-23-2004, 09:53 PM   #6
Scooby Guru
Member#: 11482
Join Date: Oct 2001
Chapter/Region: South East
Location: Winston-Salem, NC
02 WRX
Acute Stickeritis


I run about 50-52 psi on my Azenis for daily driving and lower that to about 48-46ish for autox, depending upon the surface and that particular course. (H-stock) The rears are at about 40. Granted, this is on a FWD Jetta, however I have gotten very even wear out of them this way, excepting the sides where I have killed them from autox and Dragon runs. The middle wear and inner wear is suprisingly good using this kind of pressure, along with great treadlife.

What I would recommend is starting at 50psi (cold) and then driving the vehicle for a while, then backing it down in 2lb increments. It won't hurt the tire and you should see these things happen:

A) Slightly improved gas mileage.
B) Wearing in the middle of the tire as opposed to the edges.
C) Faster turn-in response
D) Slightly less grip (who cares for driving around town? These are silly grippy anyway for rush hour or anything else around town IMO)

The extra sidewall stiffness is worth it to me to lose a little grip, granted that's for racing. For around town, crank 'em up and drive on them. They might go as high as 60psi warm, which won't hurt them in the slightest. Overinflation (excepting to the point of exploding) will not hurt a tire.

I've watched an autocrosser pump his rear tires up to 75psi and autox on it to try and get the car to rotate. It worked; he spun (i.e. don't try this at home kids!)

Point being you can add pressure to your Azenis and they will be a little happier and you won't blow them up. Using the pressures I mentioned, I have over 12,000 miles on my tires, a lot of autox events, and a lot of hard mountain driving on them.

Drive safely!
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