Wear on slicks

[derek]

I was running with pirelli slicks yesterday that had only done couple of track days. Started to get some vibration and the front left and the outer edge have raised ridges evenly spread around the wheels across approx 2-3 inches of the width of the tyre from the outside. Swapped front around and the ridges developed again on front left. I was running about 28psi and -3.5 degrees camber. Anyone seen this before.

[DazBlackCSL]

Slicks make you feel every single inch of the road Derek .. Pick up any shit and you'll feel it .. Over brake and flat spot em and you'll feel it.

Wouldn't worry about vibration, difficult to really see in the pics, tyres look a little lumpy and that you've picked up a fair bit of rubber on the shoulders

[derek]

It's the two edges in the middle of pics that are the outer edges of the wheels. the ridges are quite big and are equidistant around the edges. It's like mini speed humps all around the outer edge of tyres never seen this before.

[shimmy]

if i were to guess, and it is a guess, id say you need way more neg camber

[Chappers]

I have to say I'm amazed you can use slicks on a standard road car, I'd have thought it's break all sorts of things. Madness.

[derek]

Originally Posted by shimmy

if i were to guess, and it is a guess, id say you need way more neg camber

Anyone running more than -3.5 car was going well before the vibration started

[rstoughy]

What sort of times were you setting with the slicks Derek?
I spent all Tues PM there testing in the rain.

[shimmy]

Originally Posted by derek

Anyone running more than -3.5 car was going well before the vibration started

-3.5 is very low for slicks, more like cup camber