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Old 02-01-2012, 01:24 AM   #1
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Default Where do tires wear when alignment is right

I just picked up some toyo t1r used and they are worn on one edge. I currently have a stock aligment but will be getting it aligned for better performance soon. So my question is should I put the more worn edge on the inside or the outside. I think a performance oriented align will where the tires more but which edge do they where more inside or out.

Thanks

Ps: if any one has thoughts on specs for aligment let me know. I searched a couple of weeks ago and found some good specs to use but that info was a little old so if someone is feeling helpful hit me with it.
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Old 02-01-2012, 01:42 AM   #2
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If anything tires should wear on the inside, indicating negative camber. Wear should be even when raced, and inside edge when street driven. That's as far as I understand at least. When you're racing around a corner the wear will happen on the outside tires, and the body roll combined with the negative camber will theoretically keep them vertical. Or the contact patch horizontal, however you want to look at it. This creates fairly even wear.

When street driving, you won't be turning as hard or as much, keeping that negative camber static and wearing the aforementioned inside edge.

http://949racing.com/miata-race-alignment-info.aspx
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Old 02-01-2012, 02:10 AM   #3
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oh oh oh

my RS-3s after 15k street miles, 50-100 autocross runs and 1hr of track. 2.5*/2.9* camber front/rear (aka spec-miata guy did my alignment and gave me more rear camber).
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Old 02-01-2012, 07:27 AM   #4
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T1-R's need a lot of camber to wear evenly if you drive them hard, they kind of roll over on de side.
My left tyres are very worn on the outside edge because of taking roundabouts fast and not having enough fast right hand corners to balance the wear out.
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Old 02-01-2012, 09:09 AM   #5
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Just flip the tire and run what ya brung. Even with 1* of camber all the way around I get uneven wear on my daily. I run 2.7 and 2.5 on my track car and the wear on that car's street tires is funny.
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Old 02-01-2012, 09:24 AM   #6
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Quote:
Originally Posted by soviet View Post
oh oh oh
That inner edge scrubbing is due to toe (-out I guess), and the slanted wear in general is camber.
I managed to kill a par or T1Rs on a DD in exactly that edge scrubbing way when I miscalculated my front toe once... 3/8" out is a bit much (but it changes lanes rapidly)
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Old 02-01-2012, 10:36 AM   #7
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OK so I should put the already worn edge on the outside?
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Old 02-01-2012, 10:42 AM   #8
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Quote:
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OK so I should put the already worn edge on the outside?
yes
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Old 02-01-2012, 11:41 AM   #9
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Quote:
Originally Posted by NiklasFalk View Post
That inner edge scrubbing is due to toe (-out I guess), and the slanted wear in general is camber.
I managed to kill a par or T1Rs on a DD in exactly that edge scrubbing way when I miscalculated my front toe once... 3/8" out is a bit much (but it changes lanes rapidly)
I went to my local "Miata guy" and told him to have at it. He builds and races spec miatas. What I was told later, is that spec miata guys run more rear camber because of their spring rates.

Front:
2.2* camber, 5* caster, 1/16 toe
12.25" ride height

Rear:
2.9* camber, 0 toe I think
12.75" ride height

for this year I'll go with 0 toe and less camber aka "949 says do this and WIN"
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Old 02-02-2012, 01:30 PM   #10
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Quote:
Originally Posted by soviet View Post
I went to my local "Miata guy" and told him to have at it. He builds and races spec miatas. What I was told later, is that spec miata guys run more rear camber because of their spring rates.

Front:
2.2* camber, 5* caster, 1/16 toe
12.25" ride height

Rear:
2.9* camber, 0 toe I think
12.75" ride height

for this year I'll go with 0 toe and less camber aka "949 says do this and WIN"
Front and rear cambers look *** backward compared to what works good for me.

Bob
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Old 02-02-2012, 01:32 PM   #11
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What alignment for highway cruising in my daily for ganxter tire wear? I had 1* of camber previously, no tow, 5* caster and the insides wore first.
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Old 02-02-2012, 01:32 PM   #12
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Quote:
Originally Posted by bbundy View Post
Front and rear cambers look *** backward compared to what works good for me.

Bob
I know better now. This was done by a Spec Miata guy. I just told him I want to autocross. From what I gather, Spec Miata guys use more rear camber because of the 700/325 spring rates.
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