Dimensions:
Housing shell inner diameter: 41 mm
Inner diameter of the race ring: 33 mm
Thread: M28x1.25
Inner diameter of the end nut: 22.3 mm

Note: The fork crown nut / end nut is often mistakenly described with an M28x1 mm thread. However, it is an MF27.5×1 mm thread.

Item fits the following models:
PIAGGIO 50 BOSS 1988 – 1989
PIAGGIO 50 BRAVO ERRE 2 1975 – 1981
PIAGGIO 50 BRAVO 3 1987 – 1990
PIAGGIO 50 SI 1978 – 1988
PIAGGIO 50 SI FL2 1991 – 1997
PIAGGIO 50 SI MIX 1996 – 1999
PIAGGIO 50 SUPERBRAVO 1985 – 1990
PIAGGIO 50 SUPERBRAVO 3 1987 – 1990

Original Piaggio spare part number: 190823