Wheel Type 42, Type 52 - What does that mean?

In the case of wire wheels for classic cars from the 1950s onwards, a distinction is made between "wheel type" 42 and 52.  

"Wheel Type" - a designation refering to the maximum size of outer bearing, in millimeters. 

The actual hub diameter is measured across the outside of the splines on the car and not the wheel itself:

  • 62.5 mm for the 42 wheel type (MG, Healey, Triumph, Lotus, some Aston Martin)
  • 73 mm for the 52 wheel type (Jaguar, Volvo, some Aston Martin)

EXAMPLE:  The hub below is considered a 35 wheel type from a 1960 ASA that uses splined hubs and spinners.  Look to see where the calipers are measuring to obtain the 51.97mm reading.  See Chart below.

 Wheel Type

Splined Hub Diameter

# of Splines "Short Hub" Spline Length "Standard Hub" Spline Length
35 52mm 62 36mm 56mm
42 62.5mm 75 37mm 62mm
52 73mm 88 N/A 62mm



Article précédent Article suivant

Laissez un commentaire

Veuillez noter que les commentaires doivent être approvés avant d'être affichés