ianMac
Well-Known Member
- Location
- Bognor Regis
Hi,
does anyone know where I could get one of these, or similar?
Thanks,
Ian
does anyone know where I could get one of these, or similar?
Thanks,
Ian
Yes, it looks like an unusual fixing for an extra cog onto a Shimano Nexus 3 coaster-braked hub (current model SG-3C41).I thought George Longstaff used to adapt the hubs for his trikes, ie not a production item.
The gears aren't on the drive axle, they're on a 'mid-drive' set up with a 'slave' or 'dolly chain' driving the back axle. Only trouble is if this secondary chain fails the you've no back brake.Yes, it looks like an unusual fixing for an extra cog onto a Shimano Nexus 3 coaster-braked hub (current model SG-3C41).
The nearest production models are probably the SA hubs which take a 9-speed cassette, such as the CS-RK3 (disc braked) or CS-RF3 (rim braked).
Edit: that's wrong: the extra cog is replacing a set of spokes = it's driving the rear axle. Oh well, I leave it here as an interesting note of hybrid hubs.