wunder beta

📘 A click becomes cable movement

A click becomes cable movement

lessons

~10 min

to learn

🔬 Science

subject

Adults

level

Start the course →

What you’ll learn

The command
The cassette
The derailleur
The linkage
The spring
The shift
Index spacing
Travel limits
Cable adjustment
Load and timing
The complete path

Questions this course answers

What does the indexed shifter primarily change?

Each click places the shifter and cable at a designed position.

What is the derailleur's upper pulley for?

The guide pulley steers the chain onto the chosen sprocket.

What force returns the derailleur when cable tension is released?

The derailleur spring supplies the opposing return force.

What do limit screws establish?

They keep the guide pulley within the cassette's intended range.

Why can heavy pedaling make a shift harsher?

A heavily loaded chain has less freedom to move across sprockets.

Grounded in trusted sources

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Every Wunder lesson is built from real, reputable sources — never invented.

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