2

This question already has an answer here:

I bought some old bike from netherlands, I wanted to restore it. Rear wheel is broken and I wanted to exchange it but there is this strange freewheel which I cannot identify, do you have any idea what it is? FreewheelRear wheel and freewheel

marked as duplicate by Argenti Apparatus, Criggie, ojs, David Richerby, whatsisname Jun 4 '18 at 22:34

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

  • @sashir please don't take the duplicate flag as being an attack on you - instead it shows that the same question has already been asked and answered, so to avoid duplicating effort, this question gets pointed at the original. IE, "here's one we prepared earlier" – Criggie May 31 '18 at 10:42
  • Ok, sorry I didn't noticed this one, thanks for your help :) – Sashir May 31 '18 at 21:33
2

It's called a Helicomatic. The idea was to make a freewheel that does not need a lockring that has to be torqued tight. The helical splines make the freewheel tighten itself.

Amazingly we had this exact question about a month ago, so I flagged this as a duplicate question.

Not the answer you're looking for? Browse other questions tagged or ask your own question.