ACS Main Drive Freewheel
37" x 24tpi Weight: 181 ACS Main Drive Freewheel - 16t, Silver ACS Main Drive Freewheel - 17t, Silver ACS Main Drive Freewheel - 18t, Silver. Compatible with 1/8" chain Uses traditional BMX 4-prong freewheel remover Freewheel Teeth: 16,17,18 Color: Silver Cassette Body Type: Threaded Standard 1.ACS Main Drive Freewheel - 16t, Silver Value-priced freewheels that focus on quality for everyday use.