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Dual sprocket Internal geared hub

Discussion in 'Bicycle Mechanics and Repairs' started by ianMac, 17 Jul 2017 at 11:35.

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  1. ianMac

    ianMac Well-Known Member

    Location:
    Bognor Regis
    Hi,
    does anyone know where I could get one of these, or similar?
    hybrid_rear_hub.jpg

    fichtel-sachs_415_trike.jpg

    Thanks,
    Ian
     
    Drago likes this.
  2. raleighnut

    raleighnut Guru

    Location:
    On 3 Wheels
    Sturmey Archer?

    I've got a similar but derailleur set up on the back of my trike,

    DSCN0050.JPG

    with mine though there isn't a brake in the hub, the brake is on the rear 'through' axle.
     
  3. raleighnut

    raleighnut Guru

    Location:
    On 3 Wheels
    Mind you if anyone does know where you can get em from @mickle might.
     
    TheDoctor likes this.
  4. ianMac

    ianMac Well-Known Member

    Location:
    Bognor Regis
    20161025_160848-67faf6747f344d4345ef837183b2be9f.jpg

    Thanks. The brake is unimportant at the moment. It's the internally geared hub that I really want! It's going on this!
     
    Last edited: 17 Jul 2017 at 13:01
  5. MichaelW2

    MichaelW2 Über Member

    I thought George Longstaff used to adapt the hubs for his trikes, ie not a production item.
     
  6. chriscross1966

    chriscross1966 Active Member

    Location:
    Swindon
    Pashley use the system on their trikes, otr at least used to. I got sprockets from them when I used a 3-speed sturmey to add gears to teh pedals on my Sinclair C5
     
  7. mjr

    mjr Wanting to Keep My EU Citizenship

    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.
     
  8. raleighnut

    raleighnut Guru

    Location:
    On 3 Wheels
    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.
     
  9. Tigerbiten

    Tigerbiten Über Member

    The easiest way I can think of doing something like that is to get a hub with a disk brake.
    Then machine the extra sprocket so you can bolt it to the hub in place of the brake rotor.
    Easy ........ ^_^
     
  10. Adrian

    Adrian Heed the elf's wisdom

    Velosolo have done it for you.
     
    MichaelW2 and mjr like this.
  11. ianMac

    ianMac Well-Known Member

    Location:
    Bognor Regis
    HEY! Thanks. Will contact velosolo.

    Ian
     
    Adrian likes this.
  12. ianMac

    ianMac Well-Known Member

    Location:
    Bognor Regis