Dunlop Wire Wheels Hub Guide
|Actual Hub Diameter|
|Number of Splines||Spline Length|
|35||52 mm||62||36 mm||56 mm|
|42||62.5 mm||75||37 mm||62 mm|
|52||73 mm||88||37 mm||62 mm|
|62||82.5 mm||100||57 mm||78 mm|
|72||92 mm||112||55 mm||84 mm|
|80||102 mm||124||58 mm||87 mm|
|90||111.5 mm||136||56 mm||94 mm|
|100||123 mm||150||59 mm||97 mm|
|120||137 mm||168||63 mm||101 mm|
Note 1: The wheel type designation refers to the maximum size of outer bearing, in millimetres, which can be used with that hub.
Note 2: Actual hub diameter is measured across the outside of the splines on the car and not the wheel itself. Dimensions are ±½mm.
In Europe most splined hubs are of the Rudge-Whitworth type having V-shaped serrations with dimensions as above.
On Rolls-Royces, you may find RAF type hubs which have square splines.