{TAIL ~ The bicycle drive unit} 1, wherein the detent plate 16 is machined into {HEAD ~ the rotary plate} 5 with a plurality of detent grooves 16 a included therein, 
{ TAIL ~ The bicycle drive unit } 1 , wherein the detent plate 16 is machined into { HEAD ~ the rotary plate } 5 with a plurality of detent grooves 16 a included therein ,
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH