Abstract: A pedal block may have an elongated quasi-cuboid structure characterized by a first foot-contacting surface on one face having a first front end and a first back end, and a second foot-contacting surface on an opposite face having a second front end and a second back end. A pedal spindle may be disposed in the pedal block between the first foot-contacting surface and the second foot-contacting surface and may include an axle and a crank attachment. The first foot-contacting surface and the second foot-contacting surface may each be contoured to contact a substantial portion of a foot of a rider whose foot is disposed on either the first foot-contacting surface or the second foot-contacting surface. A heel cup may be provided to support the heel and ankle of the rider.

Abstract: A steering system may include a seat assembly, a frame assembly and a wheel. The frame assembly may include a steering tube that is rotatably disposed within a head tube with a cam at a top end and a pair of forks at a bottom end to which is coupled an axle of the wheel. An arm may be disposed on and rotatably coupled to the seat assembly, and rotatably coupled to a left armrest and right armrest. A steering rod may be coupled to the cam and to one of the arms, the left armrest or the right armrest, such that forward movement of one of the armrests causes the steering rod to be translated forward and the cam to rotate in one direction, and backward movement of the same armrest causes the steering rod to be translated backward and the cam to rotate in an opposite direction.

Abstract: A steering system may include a seat assembly, a frame assembly and a wheel. The frame assembly may include a steering tube that is rotatably disposed within a head tube with a cam at a top end and a pair of forks at a bottom end to which is coupled an axle of the wheel. An arm may be disposed on and rotatably coupled to the seat assembly, and rotatably coupled to a left armrest and right armrest. A steering rod may be coupled to the cam and to one of the arms, the left armrest or the right armrest, such that forward movement of one of the armrests causes the steering rod to be translated forward and the cam to rotate in one direction, and backward movement of the same armrest causes the steering rod to be translated backward and the cam to rotate in an opposite direction.