Tascam Porta 02 belt sizes

This is the belt accessible from the "top" - where the cassette goes. About 67mm.

I believe these are the original belts. They're not stretched very tightly around the caliper - just enough to get the "half circumference" measurement. They're square and about 1mm thick.

This is the larger belt on the "bottom" - requires removal of the tape mechanism from the chassis to access. About 110mm.

This is the smaller belt on the "bottom" - requires removal of the tape mechanism from the chassis to access. About 58mm.