Are Cambertires legit?
 

I fell down the wikipedia hole today and somehow ended up getting linked to http://cambertire.com. These seem like the SEB would swat them away under current stock class. However with the new street class coming next year, and it's leniency towards camber adjustments, they might be another tool to get more negative camber.

Has anyone seen these in action before? (Someone must have, there is a picture of an 86 on their website). Did they work well? Are we on the edge of some tire revolution of people playing with sidewall stiffness and length? Or is this all just wishful thinking?

Ha ha that's actually old technology and I believe they were BFG R1s back in the early 90s that had that. Its basically good for classes that limit suspension mods so the tire helped deliver the extra negative camber needed.

First saw these on Jay's garage... Think it was 2010-2011 though.

Whatdoyaknow: http://m.autoblog.com/2010/08/13/vid...ires-inventor/

The more I think about it; you can't flip the tires, so wear is going to be more of an issue. And unless they come up with the perfect compound for the weight of our car, we're better off with an even tire.

And you're effectively driving on cones... artificial toe?

It's been probably 10 years since I read it but I seem to remember specific tire model banned (I think it was a Pirelli) because it was molded with camber. It wouldn't fly.

Edit: Here it is. 2005 rulebook, 14.3.D:

Not positive that's the tire or not but I'm pretty sure it was molded with camber.

I cant even begin to imagine controlling a power induced slide....

Um I can say John Scott was racing on the 4 or 5 degree Cambertires at the Milwaukee solo event this last weekend. He ran in STU with a EVO that was Street Mod, his tires are marked 140TW but are actually R-comps. He still was beat by a underprepped STU 04 STI

The tires do not have enough sizes to be legal for SCCA Solo use in Stock or Street Touring.

I also have driven on them and raced on them at an autocross event in CO.

How's that?

The aren't curved in the plane that toe is measured in. But you caster would change as you rolled to the shorter part of the tire, as would the gearing of that tire. I wonder how much the diff would like getting spun even faster?

Yes, but tire deflection on the contact patch effectively creates a force that acts like toe...

Treadwear, as I understand it, has no units or standard of measure. It's up to the manufacture to just pick a number.

And shorter sidewalls would mean less deflection. I wonder if they squirm less because of that?

squirm is generally a function of tread pattern...

I love it when you talk dirty.

I thought it was from the sidewall deflecting, now I know better. Something like in this image(it's probably exaggerated from the camera and heat, that front outside tire is hardly holding on!): https://twimg0-a.akamaihd.net/profil...1/desktop2.jpg

But how did he decide those tires were "actually" r comps?

Small tire MFG that is making them for him. He made the molds to say TW140.


http://www.mandhtires.com/ M&H racemasters is who molds up and constructed the tires for him. Theay are the compound engineers for the makeup of his tire. They are R-comps.


http://www.cambertire.com/technology/Default.aspx the website that explains it

click on buy now when you get there and see the tires he was on last Sunday at our local autocross event which is also the pics of his car on the top in the header of his site. He ran the 265's with the rockers also illegal due to tire width.

3° Camber Tires
3° Tires are better suited for auto cross and racing enthusiasts as well as professional racing teams. A more aggressive tread pattern, available "rockers" and wider tires appeal to the more serious of drivers. Deeper treads give customers a longer tire life compared to other available tires on the market. Variable tread depth and helical treads give a more even tire wear as the rubber wears away.

265/35R18 - R Compound* With Rockers:
Sidewall: Blackwall:
Load Index: 515kg (1135 lbs):
Speed Rating: N/A:
Tread Wear: R:
Tread Depth: 12/32" - 13.5/32":
$338.41


265/35R18 - R Compound* Without Rockers:
Sidewall: Blackwall:
Load Index: 515kg (1135 lbs):
Speed Rating: N/A:
Tread Wear: R:
Tread Depth: 12/32 - 13.5/32":
$331.28

Here are the results from last Sunday

http://www.scca-milwaukee.org/solo/2013/13sched.html

class
http://www.scca-milwaukee.org/solo/2...0class.htm#STU

pax
http://www.scca-milwaukee.org/solo/2...lts,%20pax.htm