Contavelo Crank Built-in Transmission
Description
1. Product Name: Contavelo Crank Built-in Transmission
2. Design Specifications : Innovative design with transmission within standard cranks
3. Technical Specifications : Shift technology through pedaling
4. Technical Description : ""Contabello's pedal-motor crank transmission removes the transmission parts of traditional bicycles, such as driers, shifters, wires, and inner chains
It is a device that installs a transmission inside the crank and shifts according to the rotation of the crank with only a single chain ring.
In the shift method, the shift is completed when the user rotates about 45 degrees to 90 degrees counterclockwise while pedaling the pedal clockwise.
At this time, the crank gear (operation gear) in the crank is combined with the high and low gears, and the shift is made.
The high and low speed shifting methods are the same, and the gear ratio of this product is 53-39 (changeable).""
5. website : www.contavelo.com
Project Overview
Overcome limitations, and enjoy extended freedom of movement.
Your bikes become extremely easy from now on.
The pedal-driven crank transmission of CONTAVELO eliminates tranditional bicycle shifting components such as the derailleur, shifter, wire, and inner chainring.
Instead, it installs the transmission within the crank itself, allowing for gear shifting with a single chainring.
The shifting mechanism works by rotating the pedal counterclockwise for about 45 to 90 degrees while pedalling clockwise.
(Structure and mechanism of the product)
Mechanism
When the crank rotates once, the chainring rotates 0.75 times.
When the crank rotates once, the chainring rotates once.
Company Information