johnc Posted February 10, 2010 Share Posted February 10, 2010 (edited) http://www.cambertire.com/ Bada bing, bada boom. Edited February 10, 2010 by johnc Quote Link to comment Share on other sites More sharing options...
bjhines Posted February 10, 2010 Share Posted February 10, 2010 Nice read there. Where do I sign up for a set? Seriously, has no one thought of that before? Zero Toe front and rear and 2.5 degrees of negative camber to run them is not too bad. Quote Link to comment Share on other sites More sharing options...
eec564 Posted February 10, 2010 Share Posted February 10, 2010 We could use these on Z31s that are either lowered or just plain worn out and sagging so we don't have to slot the sub-frames or install camber plates. Quote Link to comment Share on other sites More sharing options...
thehelix112 Posted February 10, 2010 Share Posted February 10, 2010 My eyes are bleeding. Dave Quote Link to comment Share on other sites More sharing options...
Administrators RTz Posted February 10, 2010 Administrators Share Posted February 10, 2010 Who's gonna man up and test a set? Quote Link to comment Share on other sites More sharing options...
MAG58 Posted February 10, 2010 Share Posted February 10, 2010 I'm pretty sure there's a fantastic reason nobody has made a tire that has multiple diameters contacting and transferring power at the same time, but I'm going to shut up and wait until JohnC keeps me from talking out of my back side. Edit: I feel that having a tire with two different radii like that would put HUGE stress on suspension components. Quote Link to comment Share on other sites More sharing options...
tube80z Posted February 10, 2010 Share Posted February 10, 2010 Years ago Pirelli had something similar in F1. I remember reading about it in the old autoweek newspaper format. I also remember two compound tires and other odd things being tried. I also remember my early BFG autox tires had two different sidewall stiffnesses, which is sorta similar. Cary Quote Link to comment Share on other sites More sharing options...
JMortensen Posted February 10, 2010 Share Posted February 10, 2010 I made some of those myself. Pretty easy actually. Run slicks with way too soft springs and not enough camber. Pretty soon the tire is a cone shape like a worn out skateboard wheel or a cambered tire. Never bothered flipping the tire on the rim though... Quote Link to comment Share on other sites More sharing options...
proxlamus© Posted February 10, 2010 Share Posted February 10, 2010 how interesting Quote Link to comment Share on other sites More sharing options...
bjhines Posted February 10, 2010 Share Posted February 10, 2010 I found a facebook entry for some tire shop that mounted a few sets on customer's cars. Not much more info on availability though. Quote Link to comment Share on other sites More sharing options...
rxsleeper Posted February 10, 2010 Share Posted February 10, 2010 New twist on an old concept. Back in the 70's Pantera's came equipped with a "cambered" tire. I think they were Goodyear. The tread was "stair stepped" with about a 1" difference in diameter from outside to inside. At least the rear tires were that way. Quote Link to comment Share on other sites More sharing options...
cygnusx1 Posted February 10, 2010 Share Posted February 10, 2010 Read the last line of my post in 2006. http://forums.hybridz.org/showpost.php?p=653740&postcount=43 Quote Link to comment Share on other sites More sharing options...
rxsleeper Posted February 10, 2010 Share Posted February 10, 2010 Just my opinion but isn't it early for April Fool's jokes John? See the attached photo for the listed address on the camberedtire webpage. 32180 Oakland Rd....... Quote Link to comment Share on other sites More sharing options...
cygnusx1 Posted February 10, 2010 Share Posted February 10, 2010 Low overhead Quote Link to comment Share on other sites More sharing options...
sweetride2go Posted February 10, 2010 Share Posted February 10, 2010 I've found that Googlemaps is almost 4+ years behind on their pictures in my area. It really sucks when you are trying to find an address that is in a new area and all you get for a satellite photo is a bunch of trees, heh... I wonder what kind of lifespan you would get out of those tires? Seems like they might scrub a lot if not set up properly... Ryan~ Quote Link to comment Share on other sites More sharing options...
johnc Posted February 10, 2010 Author Share Posted February 10, 2010 Think for a minute about the loads in the tire and the suspension if your 2.5 degree cambered tire is bolted up to a suspension corner that has 0 degrees degree of camber. Quote Link to comment Share on other sites More sharing options...
cygnusx1 Posted February 10, 2010 Share Posted February 10, 2010 Yes, it's absurd and will only work well, when the suspension is loaded to, exactly the correct point, that will make the "cambered contact patch", flat. The odds of having the tires fall into their "sweet spot" at the right place and right time are slim to none. Quote Link to comment Share on other sites More sharing options...
JMortensen Posted February 10, 2010 Share Posted February 10, 2010 Yes, it's absurd and will only work well, when the suspension is loaded to exactly the correct point that will make the "cambered contact patch", flat. The odds of having the tires fall into their "sweet spot" at the right place and right time are slim to none. Forgive me for being dense, but why would this be any different in terms of loading the bearings and suspension than actually running 2.5 degrees of neg camber? I realize the contact patch would be flipped from what we're used to dealing with. And yes, tires with lots of neg camber don't get loaded just right and get the contact patch flat until you're right on the limit, but we still set the cars up for that, because it results in lower lap times. The rest of the time we're braking and accelerating on trapezoidal or triangular contact patches and it still works out better in terms of lap time. Only downside I can see is that it might have some really bad camber thrust, but I think a standard tire with lots of camber can have that problem too, albeit in the opposite direction. I'll stick with regular tires and adjust the angles with the suspension, but I fail to see why this is purely a joke and wouldn't have any practical benefit. What am I missing? Quote Link to comment Share on other sites More sharing options...
cygnusx1 Posted February 10, 2010 Share Posted February 10, 2010 I see it as another variable that does not need to be there. I guess instead of adjusting suspensions, you can just swap tires at the track until you find the one that suits you. Quote Link to comment Share on other sites More sharing options...
johnc Posted February 10, 2010 Author Share Posted February 10, 2010 (edited) Negative static camber (in the suspension) is used to offset camber gain in roll. It a bad thing for braking and acceleration but the gains in corner speed outweigh the drawbacks. Some of these drawbacks can be minimized with a suspension that gains negative camber in bump. With a negative cambered tire postioned this way on the car: you essentially have to start out with 0 or positive camber and the allow roll camber to plant the tire on the ground. That will work fine on a Morgan with a sliding pillar front suspension but on any modern car it just moves the camber gain issue to the tire (which is non-adjustable) from the suspension (which is adjustable). Or, you can flip the negative camber tire and position them this way > I'm not smart enough to discuss the internal tire distortion/thrust issues and I ahve no clue what kind of slip angle curve that tire will have. Edited February 10, 2010 by johnc Quote Link to comment Share on other sites More sharing options...
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