21 teeth

Duplex| d: 44.40mm
Duplex| Dh: 177.80mm
Duplex| L: 101.60mm
Pitch | Via Dp: 298.27mm
Outside | Dia Do: 321.56mm
Bore | d: 38.10mm
Hub | Dh: 158.70mm
Hub | L: 63.50mm