Efneo Gearbox three-speed single-cog crank (white)

Efneo Gearbox three-speed single-cog crank (white)

The producer guarantees the Efneo gearbox works perfectly in all conditions except for extreme off-road applications like downhill or professional MTB.

M. Özgür Nevres

I am a software developer, an ex-racing cyclist (at the amateur level) and a science enthusiast. Also an animal lover! I write about cycling on this website, cycling-passion.com. You can check out my social media profiles by clicking on their icons.
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