Abstract: The crank arm of a bicycle is selectively shortened by removing the pedal and attaching one end of the shortener to the pedal opening in the crank arm, with the other end of the shortener being locked to the crank arm by a pair of cams positioned against opposite side edges of the crank arm. Rotation of bolts through the eccentrically mounted cams causes the cams to snugly engage the crank arm side edges to lock the shortener to the crank arm.

Abstract: A bicycle repair stand particularly well suited for tandem bicycles supports the bicycle from one side only by being connected to the crank arm assembly through the dust cap threads and/or the fixing bolt threads of the crank arm axle. A third embodiment includes the locking bolt of the stand being connected to a stand arm having a clamp at its outer end engaging a crank arm connected to the axle. In all embodiments the crank arm is allowed to fully rotate without interference from the stand. The stand post may be pivoted from a first position where the bicycle is mounted and dismounted from the stand to a second position where the adjacent wheel is raised off the ground.