Originally Posted by
TejanoTrackie
The ACS Crossfire is also a good modestly priced single freewheel.
I have not tried that one... I don't ride much singlespeed and when I did the Shimano freewheels were the best bang for the buck unless you could find an old Suntour.
The coolest Suntour freewheel had a lockout to allow it to be run fixed or free with nothing more than the small turn of a set screw.