Why one must alway stay alert and watch the car coming your way..

http://www.mazdas247.com/forum/showpost.php?p=4713813&postcount=1


I was suprised to see this.

 

That car is slammed! wow...

 

ASP Loti those things can make some SERIOUS grip.. I'd have a talk with the wheel mfg.

 

wow. that's absolutely ridiculous... probably last thing I would ever think would fail catastrophically.

 

I saw a tire come off a RX-7 at last year's GRM $2008 Challenge.
But that was because the lug threads stripped.
It was exciting, in a fear for your life way, when the tire came rolling toward those of us who were watching. (Sharron Shields saw it first and pushed me toward safety.)

Luckily the tire was diverted so it hit a truck bumper. It would have done some serious damage if it had hit a car, or spectator.

P.S. The Lotus rim looks like a manufacturing error.

 

Wheel company. I guess rims have a shelf life.

http://www.diamondracingwheels.com/challenger.html

 

In autocross, I've seen spokes break, lugs strip, Bearings pull out, even a brake rotor split from the hub.. but a wheel center.. never... Diamond is typically a well considered companay. all the failures I've seen were from east asian MFG's selling under diffrent names.

 

Wow! I wonder if it was just metal fatigue? Is it possisble that using lugnuts that have an incorrect tapered shoulder for a given wheel could contribute to a failure?

My race wheels are Diamond brand. Not something I would like to have happen!

 

I was really looking at the lugs in that photo, myself. They seem to have a lot of taper to them, and if the wheel holes had less taper, that could very well be the cause of the failure right there.

 

According to the Diamond website, the lug nuts for those wheels should be 60 degree taper. Curious what the ones are that were used.

Another possibility is that incorrect ones were used in the past... who knows? Used race wheels are bought and sold all the time. It might be a good idea for anyone buying used wheels to at least dye test the lug hole area for any fractures/cracks. Certainly food for thought..