The crankset slider is a crank based concept that consists of a crank with a channel machined out of it. A tension spring is attached at the top of the channel and to the pedal holder. In the 3 to 6 o’clock position of the pedal stroke the spring elongates, thus increasing the length of the crank. The crank length will be shortened at the top of the pedal stroke, which will allow the knee angle to open up and ease the pain in the knee.

In this section the initial 3-D design of our crankset slider design is included in figures below.First figure shows our design without the tension spring and pedal holder in it and in second figure shows the crankset slider with the pedal holder attached to spring. The channel extends for most of the crankset, which will make the extension in the power stroke equivalent to a standard sized crank length and at the top of the stroke the crankarms will be shorter to allow for a greater knee angle.

Figure below illustrates how the crankset slider design appears when attached to a bicycle. The crankset is shown at the bottom of the pedal stroke to display how the crankset behaves at that part of the stroke.