I have the BB's as stated in another thread. I queried RK just to see what their take is on the issue of 'cracking'....which seems to be the main concern. Below is their reply. BTW...I use a product, not Armor All, but one that actually brings out the sidewall look a bit sharper and cleaner. The 'patina' look is still the main look but the product seems to protect the sidewalls a little better.
I just think it fair to be sure everyone knows the options. I was one of the early proponents of getting the Avons here and was working with a guy in SF to make that happen. I just let it take it's own path ...figuring it would catch on easily. I was ready to order them but didn't like the flat look of the sidewalls. That is me!
I went to these BB's about 3 months ago and have had the time of my life in performance...not to mention look! But I would NOT sacrifice look for safety, Never!. I guess I could worry about the 'insurance' issues should an accident occur. Most likely I wouldn't be around to negotiate if a crash did happen....but that's a different story. I have heard other opinions on the subject...like other cars with non DOT items like tinted windows, etc. But I digress.
fred z
"About cracking, yes – Armor all or other similar products will help. The cracking is not dangerous until the cracks expand “deep” and allow oxygen to attack the cords, this usually take five plus years. Your process has definitely Helped."