Checkers launches limited edition sixty60 toy bikes

I apologize, but I couldn't find any information on Checkers launching a limited edition "sixty60" toy bikes. Checkers is a popular fast-food restaurant chain, and it's unlikely that they would be launching a toy bike product.

It's possible that you may have come across a misunderstanding or misinformation. If you could provide more context or clarify what you mean by "sixty60" toy bikes, I'd be happy to try and help you further.