Front wheel bearings size?

[lassenc]

Hey guys

I want to change the wheel bearings in my 'C front wheel, but which size?

Heiden tuning lists three different sizes, but which do I need?

Kind regards, Lasse

 

[blackbetty]

I just bought new wheel bearings front and rear today for my 75.

Koyo 6303-2RS x 2 for the front according to mikes: