Does anybody know anything about these cranks? I can't find much of anything about them on the internet:



Arm Length: 165.0 mm
Rings: 49
Spindle Interface Type: Square Taper ISO
Spindle Length: 107 mm
Chainring BCD: 144 mm
Bolt Pattern: 5-Bolt
Crank/FD Type: Single Ring
Chain Compatibility: 1/2" x 1/8"
Pedal Spindle: 9/16"
Color: Silver/Black
Weight:
Crank Intended Use: Track