I found a loose spoke on my bike while cleaning it this past week. Upon further examination I found the head corroded off of the spoke. The spokes are straight pull aluminum that thread into the hub. They are mated to carbon rims. I am hearing this is a common problem. The wheels are just 18 months old. I have the same spokes laced to an aluminum rim that is 8 years old that have been bomb proof. Is anyone else having the same issues with this????