ACS Main Drive Freewheel 16T 1/8’’ SilverThe ACS Main Drive Freewheel is a great replacement part for your BMX bike that uses chains that are ½’’x1/8’’. There are English Threads 1.37’’. The Cassette Body type is Threaded Standard. There are 16 teeth. Weighs only 181 grams. Silver in color.816411001563
