SON 28 12 SL Center Lock Disc Dynamo Vorderradnabe - schwarz eloxiert - 32 Loch
SON 28 12 SL Centre Lock Disc Dynamo Front Hub. Moreover, it should be inconspicuous yet elegant. NOTE - The only drawback: The fork must be specially built for SL. Schmidt decided to do without retrofitting in favour of maximum robustness.