Contavelo's pedal motion crank transmission removes external shifting parts such as the dresser, shifter, wire, and inner chain of conventional bicycles, and incorporates a shift function inside the crank to maintain the standard size by hiding complex parts. This allows the user to use the bicycle without any inconvenience. Our crank transmission simplifies the appearance of the bicycle and can be easily mounted on any bicycle without the need to change the frame. In addition, our products are compatible with all bicycles and are easy to install and use.

Contavelo's pedal motion crank transmission eliminates the transmission parts of the conventional bicycle: the dryer, shifter, wire, and inner chainring
It is a device in which a transmission is installed inside the crank so that only a single chain ring is shifted according to the rotation of the crank.
In the shift method, the shift is completed when the user pedals the pedal clockwise and rotates about 45 to 90 degrees counterclockwise.
At this time, the crank gear (driving gear) in the crank is combined with the high-speed gear and the low-speed gear, resulting in a shift.
The high speed and low speed shifting methods are the same, and the gear ratio of this product is 53-39 (changeable).

1. length in cm : 265

2. Width in cm : 147

3. Height in cm : 34

4. Weight in kg : 0.4

5. Country of origin : south korea