the future of track day tires

[cdrazic93]

welcome to the future ladies and gentlemen.

http://www.cambertire.com/

these are awesome. Saw them a few years back, but I think they have been under everyone's radar.

[fourvalleys]

I wonder how this affects toe. A conical tire (with smaller diameter on the inner sidewall than the outer sidewall) will not itself roll in a straight line. Maybe the effects are negligible but I've always been curious to see how that works.

[cdrazic93]

I think the tire is meant for a suspension that has a certain degree of camber on it already, then slap on these tires and all of a sudden you have full tire contact 24/7, instead of not just in the twisties.

I remember seeing a video of these on a semi tuned Evo 8, and the comparison was surprisingly shocking. These tires were seconds faster around a track than a regular R compound was.

[sshole]

It's hardly new, but it is kinda vaporware. I don't think I've ever seen anyone running these tires in real life.

[OjiGeorge]

It's a cool idea, but seems like you would need some major toe changes if you swapped back and forth between regular tires and these camber tires. I'm guessing you would want these on your car and aligned before going to the track.

Wonder what the steel radials look like under the rubber.

[wparsons]

Unless the outer sidewall is super soft and allows the contact patch to stay flat as cornering loads build, these are just as bad as running 0 camber on any other tire. If these have a stiff outer sidewall, they'll roll over just like any other sticky tire with too little camber.

The whole point of increased camber is to keep the contact patch flat in a corner as the car rolls and suspension loads.

How would these affect toe settings? Toe is set at the knuckle, not the tire, and since these sit square on the tire in the rotational axis toe won't be any different.

[King Tut]

The future of track day tires mounted on a Rota wheel on the front page. Looks good.

[7thgear]

too bad they're not actually fast :/

[Crazy Drew]

Originally Posted by wparsons

Unless the outer sidewall is super soft and allows the contact patch to stay flat as cornering loads build, these are just as bad as running 0 camber on any other tire. If these have a stiff outer sidewall, they'll roll over just like any other sticky tire with too little camber.

The whole point of increased camber is to keep the contact patch flat in a corner as the car rolls and suspension loads.

How would these affect toe settings? Toe is set at the knuckle, not the tire, and since these sit square on the tire in the rotational axis toe won't be any different.

/\ This. With this tire you'll still wear out the outside tread first. This tire shouldn't be marketed towards racers but instead the "stanced" crowd. Or, these tires need to be mounted in reverse of how the pictures are showing it so that you can run zero to a couple degrees of camber and the smaller (then outside) sidewall accounts for the needed camber when racing.

[dem00n]

[ame="https://www.youtube.com/watch?v=Z5bT4hJ4B6M"]https://www.youtube.com/watch?v=Z5bT4hJ4B6M[/ame]

[fourvalleys]

Originally Posted by wparsons

How would these affect toe settings? Toe is set at the knuckle, not the tire, and since these sit square on the tire in the rotational axis toe won't be any different.

I don't actually mean toe settings. That's probably not the right way to describe it. If your car is driving straight on conical-shaped tires, the front of each tire will push towards the center of the car. That's the nature of it when the inside and outside circumference are different.

My question is just how severe this force will be, especially at speed. Maybe not much, but it will exist and I don't think there's any way to avoid it.

[wparsons]

Originally Posted by dem00n

I'd love to see actual hard numbers, not just seat of the pants observations. I can't find much online, but this doesn't seem to support the benefit in any way.

Originally Posted by fourvalleys

I don't actually mean toe settings. That's probably not the right way to describe it. If your car is driving straight on conical-shaped wheels, the front of each tire will push towards the center of the car. That's the nature of it when the inside and outside circumference are different.

My question is just how severe this force will be, especially at speed. Maybe not much, but it will exist and I don't think there's any way to avoid it.

Gotcha, and agreed. It might be a small enough difference to not be too noticeable, but they would definitely want to roll towards the center of the car.