Steering Column Spline Size Guide
Aircooled VW Steering Wheel Spline and Nut Size Diameters with Years
T1 Beetle / Ghia & Type 3
– 25mm diameter course spline on 1949 to 59 cars.
– 21mm diameter fine spline on 1960 to 73 cars with 27mm nut.
– 18mm diameter fine spline on 1974 on cars with 24mm nut.