R Tire Wear: Grassroots Motorsports forum: Grassroots Motorsports Magazine

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July 19, 2008 10:53 a.m. Moparman New Reader

I just checked the wear on Kumho V710s (225 50 14) on my DSP Neon and I have noticed that the inside of the tires are wearing more than the outside. Now, on a street driven car, that might seem logical for a car with front alignment specs of Neg 3 camber and 1/8th total toe-out, but the car is autocrossed only.

Could it be that I have too much neg or maybe I am not taking advanatge of the negative camber and driving to easy? This is the first time I have had as much as Neg 3 camber and it is the first time I hav worn the insided more than the outsides. I can confirm this because I still have last year's tires in my garage.
July 19, 2008 2:01 p.m. Strizzo Dork

is it driven or trailered to events?

another possibilty is that you have enough spring and swaybar that its not rolling over as much as you expect.
July 19, 2008 2:50 p.m. Moparman New Reader

Trailered. I have the Performance Driven XX Hi-rates. I only have a Neon Highline 16mm front bar.
July 19, 2008 9:12 p.m. RobL New Reader

Do you have a good diff?

Are you spinning the inside wheel coming out of turns?
July 19, 2008 10:21 p.m. Moparman New Reader

Quaiffe and no spin.
July 19, 2008 10:33 p.m. MrJoshua Dork

Lots of toe change under acceration or braking? With that much static camber and lots of toe due to suspension deflection you could be dragging the insides of the tires.
July 20, 2008 7:43 a.m. RobL New Reader

Moparman wrote:

Quaiffe and no spin.

Then yeah, I'd say that you likely have too much camber. You're running some high spring rates and large bars? You're not getting enough body roll to warrant the amount of static camber you have.

If you can get a pyrometer and set your camber by that, it would be better.
July 20, 2008 9:08 a.m. Moparman New Reader

RobL wrote:

Moparman wrote:

Quaiffe and no spin.

Then yeah, I'd say that you likely have too much camber. You're running some high spring rates and large bars? You're not getting enough body roll to warrant the amount of static camber you have.

If you can get a pyrometer and set your camber by that, it would be better.

Small front bar, but very stiff springs. I will dial out some negative camber and go from there. I have never had a problem with having too much camber on a front-wheel-drive car before.
July 20, 2008 11:31 a.m. Apexcarver SuperDork

have you done the shoe polish test?
July 20, 2008 11:37 a.m. neon4891 HalfDork

225/50/14s? how well does that size work on stock rims?
July 20, 2008 6:49 p.m. Moparman New Reader

Apexcarver wrote:

have you done the shoe polish test?

Not yet. The wear is sufficient proof. The rubber is almost feathered.
July 20, 2008 6:49 p.m. Moparman New Reader

neon4891 wrote:

225/50/14s? how well does that size work on stock rims?

Not stock wheels. Eight inch wide Diamonds.
July 21, 2008 9:55 a.m. iceracer New Reader

My Hoosiers on my ZXs/SR do the same. The inside wheel goes to extreme neg camber which depends on the amount of lean and the static setting. I rotate mine every event. which helps. They also can be reversed on the rim to help even the wear. Excess toe out will also have an effect.
July 27, 2008 12:39 a.m. jamesp New Reader

Moparman wrote: Now, on a street driven car, that might seem logical for a car with