Abstract: a bicycle-type pedal assembly has a frame sleeve extending along and centered on a sleeve axis and having a pair of axially opposite sleeve ends, and a pedal shaft extending coaxially through the sleeve, having an end carrying a radially projecting and unitarily formed pedal and a sprocket, and having a pair of radially outwardly directed races also directed axially outward away from each other. This shaft has a predetermined outer diameter at the races and is of smaller diameter therebetween. A bearing tube including an inner tube part has an external thread and an outer tube part having an internal thread. The parts are coaxial to the sleeve and shaft with the threads engaged and have an inner diameter greater than the other diameter of the shaft. Thus the shaft can be inserted axially through the tube parts, which have respective outer tube ends forming radially inwardly directed tube races directed axially inward toward each other and confronting the respective shaft races.

Abstract: A dual pedal crank assembly for a bicycle or the like has a shaft defining a shaft axis and having a pair of ends one of which is flatted and tapered axially away from the other end. This one end further forms a locking surface lying substantially in a plane inclined to the shaft axis and forming therewith an acute angle pointed toward the other shaft end. A fixed crank cast integrally with the shaft lies on and defined a fixed-crank axis generally perpendicular to the shaft axis. A removable crank extending along a removable-crank axis is formed with a recess centered on a recess axis generally perpendicular to the removable-crank axis, and complementarily shaped to the one end of the shaft so that this one end can be received in the recess with the removable-crank and shaft axes aligned. The crank is further formed with a bore centered on a bore axis spaced from the recess axis and lying in a plane generally perpendicular to the recess axis.