When I recently measured the chain on my son's hand-me-down 2005 Hotrock 24 I found out it is time for a new chain and freewheel.
The original freewheel was a Shimano MF-HG37 (14-28T). I found another freewheel, a Shimano MF-TZ07, in my parts bin. 14-28T also.
Does anyone know what is the difference in the two?