SL Self-Connecting System
The electrical connection to a hub dynamo meets many requirements. It should be convenient to use, easy to fit to the cable, robust and reliable. Moreover, it should be inconspicuous yet elegant. Whereas competitive products meet the first two criteria, the blade terminals used on standard SON are far more robust but not that easy to handle.
Without doubt the most elegant way is to avoid the connectors altogether by using the areas where hub and fork touch, i.e. the contact face. The mating process is done automatically by installing the wheel, the contact pressure of the skewer protects the contacts from corrosion.
In 2009, Schmidt Maschinenbau introduced a self-connecting system where the phase contact occurs in an insulated contact plate placed on the right drop-out and the ground contact lies on the bare left drop-out (aluminium or stainless steel). The phase cable usually runs inside the fork blade to the fork crown, where it meets up with the ground cable.
The only drawback: The fork must be specially built for SL. We decided to do without retrofitting in favour of maximum robustness. In exchange, a standard front-wheel hub may be fitted into an SL-fork.
We offer all SON 28 and SONdelux dynamo models as SL versions together with contact parts and a small selection of drop-outs.
Meanwhile numerous renowned frame builders and bike manufacturers build self-contacting bikes. Some of them also provide individual forks.
Manufacturer of wheels with SL
in Canada and the United States: