Disc brake on Shimano tandem rear hub.

[bodach]

I would like to fit a disc brake to a Shimano HF08 tandem rear hub. Do I need an adapter to screw onto the threads? Any recommendation for Disc brakes for dropped bars and do I need cable a operated brake? 

[LittleWheelsandBig]

Yes, you need an adaptor but they are available from tandem specialists. A cable disc is probably the easiest.

I can't recall what gear changers you are using - Campag Ergo, Shimano STI, bar ends or down tube levers. How many cogs, indexed or not?

[bodach]

Thanks for that. I am using shimano 10 speed drop bar STI shifters.

[LittleWheelsandBig]

From memory, the majority of 10sp road STI levers require road-pull disc brakes. The most recent road STI levers work well with MTB-pull brakes.

[LittleWheelsandBig]

There are differences of opinion regarding BB7 tandem suitability, depending on whether you are coming off Mt Ventoux or not.

[bodach]

Was thinking of a Bengal cable operated rear disc brake to fit on the Dolan. I am not likely to be coming off Ventoux at any speed unless I can get Liz back on her bike after her hip was broken for her some ten years ago. Although a slight gleam of hope yesterday when I asked her what she would really like she replied to go touring on the back of the tandem. If they were the case I would invest in a real tourer. She did get out on her bike for the first time in 18 months yesterday and manage a total of 25k and had me peching on some of the hills so great progress.

[LittleWheelsandBig]

Use the largest disc that will fit in the frame and you'll be good to go.