2012 Pioneer Run part II
More photos from Keith Marshall
A Zenith Gradua, with a single cylinder motor. Turning the lever on the top of that vertical rod engages some gears that move the rear wheel to (or away from) the motor, while also changing the diameter of the drive pulley. It was an ingenious invention to get variable gearing without stopping to change the pulley and fit a longer or shorter belt. It worked well, allowing Zenith bikes to win a lot of races against fixed geared bikes. They were subsequently barred from some competitions, and Zenith famously used the logo “Zenith Barred” in their advertising.
A nice little Kerry ladies model, with updraft carb and AIV. Note the guards around the rear wheel to keep a ladies’ skirt from being caught in the wheel. The rear stand pivots upwards to become part of the rear package carrier.
An early example of front suspension. Not strictly a ‘telescoping’ front end, but more of a ‘pillar’ type as used on rear suspensions circa 1940s.
A later Rex, with a big V twin motor. Without pedal gear, it looks like a close-coupled frame. And I think that’s a two speed ROC rear hub. Rex made very fine machines.
A Rudge Multi. Similar to the Zenith, the Rudge used a lever to separate the front pulley, thus making the gearing ratio higher or lower. And to keep the belt tension constant, the lever and linkage continued to the rear wheel and moved that pulley in or out too. Very fun to ride, you just slide the lever forward (mine had 22 positions) and the motor doesn’t really change speed, but the bike accelerates to a higher speed.
This was in the parking lot. A later bike that came to the event to watch. An interesting setup, and I saw that the rear wheel is off the ground.