Efneo GTRO three speed gearbox

[Doranine]

@Blackstridaaustria

rincipially you’re right, the Strida’s freewheel is in fact a proprietary part.
But not the thread, that is a common ISO thread with a diameter of 1,375" and 24 TPI.

I overlooked this article! The rear freehub seems to be fine.

Calculating the reduction ratio, for my purposes since I live on a hill, I want the ability to easily climb slopes of about 7% gradient rather than top speed, so a combination of fairly low first gear and second gear with a ratio close to the current 3.33, Would a 48T or 50T belt wheel be best…?