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      09-03-2012, 03:14 AM   #23
rzm3's Avatar

Drives: E92 M3
Join Date: Aug 2007
Location: USA

iTrader: (17)

Originally Posted by GTM_Challenge View Post
Glad to hear they took care of you right away. Did they give any reason or cause for why they think this happened?
According to John, owner of CCW, He has not seen cracks in similar areas on other C14 wheels.

Originally Posted by Richbot View Post
Will be very interested in what the corrective action is beyond sending out a new set. I've seen these stand up to a lot worse punishment than yours, granted the ones I see at the racetrack are usually 3pc
Originally Posted by paradocs98 View Post
Glad you found the cracks. Of those miles the CCWs have seen, how many track days does that represent? Are you on the track curbs fairly often? (I certainly am, but just wondering if you use them as well.) It's my understanding that race teams have to repair or replace wheels fairly often, even high-quality ones. Based on reading your posts for the last couple of years, I get the sense that you track fairly often. Could this just be the eventual endpoint for all wheels in the track setting, some failing sooner than others?

I check my tires for wear before and after track sessions, but not my wheels. That probably needs to change now. Thanks for the heads-up.
I have a few sets of wheels, including another set dedicated for r comp tires. It's hard to count track days, but these wheels went through 2x sets of Yokohama AD08s and 1x set of Cup tires.

I've asked a few CCW users on and around the race track but none of them had issues. Based on my speculation, I think it may just be a batch of bad forgings. The cracks appear to be caused by high cycle fatigue which grew over time. I don't go over curbs aggressively or often to shorten the life of these wheels to just 15k miles.