You'd think we would have one with how popular Fort Yargo is, but the nearest one is 30 miles away. Any reviews on the 5 or 6 I see listed would be great. Good shops near Winder that are somehow not on the map are also fine.
Addictive Cycles used to be in Braselton but moved to Buford (4050 Buford Drive Buford, GA 30045). These guys are by far one of the best shops in the Southeast. Amazing mechanics and they sell bikes for real people. There is also a coffee shop in the store. I bought a bike from them and I live in Macon, GA. They are great!