Originally Posted by RichPugh

75 Grand Mighty Details:
Ultra stiff Sugino Super Duralumin Alloy. NJS.
Spindle Interface Type: Square Taper JIS
Spindle Length: 109 mm
144 mm BCD
Crank/FD Type: Single Ring
Chain Compatibility: 1/2" x 1/8"
Pedal Spindle Thread: 9/16"
Made in Japan