Hello,
Bike source on Selwyn has a 60miler saturday am leaving around 8am, ave ~18-20....ph (704) 525-8410‎...known as spamerton...they also have a smaller 25miler that leaves at 9am ave ~16 no drop.

There is a weekly ride list here:
http://www.bikecharlotte.com/

and here...
http://www.weeklyrides.com/find-a-ride

Hope this helps

Today its ~75 and sunny, check weather.com...bring you gear as it can be cold in the morning.