Originally Posted by
Winfried
Thanks for the info.
Because I don't have the tech skills to do it, and the retailer from which I bought told me it was either expensive or right-down impossible to modify the World Sport to add more speeds. Considering the price of the World Touring Disc, I'll pass and buy a Dahon/Tern instead.
Interesting retailer you have there... it's the same setup as the
THIS ... Birdy offered the same setup for the legacy frame bikes (which I prefer) originally as the Sachs 3x7 and later the SRAM Dual Drive .. I'd look at dealers who are Birdy savvy ... I have a brand new complete Birdy wheel with Sachs 3x7 , cassette, shifters etc. in my parts department for under $300 complete ... shipping to France would probably be prohibitive, but that gives you an idea of how inexpensive the upgrade would be... old wheel out, new wheel in, add shifters and cables and adjust... pretty easy... I used to ride a Birdy Silver, same bike as yours, but with the Sachs 3x7 .. one of my favorite bikes...