S&S Cycle Inc. will celebrate its 50th anniversary with a motorcycle event that’s expected to draw thousands of people next June to the La Crosse, Wisconsin based headquarter. I have been contacted to be among the 50 custom builders who will build an S&S based custom to be exhibited during the June 27-29 celebrations. The engines used will have a special serial number from 1958 (the year the company was founded) through 2007. It is estimated that about 20,000 people could attend this next year event. S&S Cycle.