90R55: Nominal displacement is 55 cubic centimeters per revolution (CM³ / Rev).
90R75: Nominal displacement is 75 CM³ / Rev.
90R100: Nominal displacement is 100 CM³ / Rev.
90R130: Nominal displacement is 130 CM³ / Rev.
90L55: Nominal displacement is 55 CM³ / Rev.
90L75: Nominal displacement is 75 CM³ / Rev.
90L100: Nominal displacement is 100 CM³ / Rev.