Duomatic on the Danube: the Sturmey Archer 2-Speed Kick Shift Hub

Over the weekend I rode a bicycle with a Sturmey Archer Duomatic hub - complemented with a front SA hub, which I thought looked rather nice.

You may recognise the bicycle as a Bella Ciao - It is a Neorealista model in "Sabbia Frizzante," which is a sort of sparkly champagne colour that just stops short of being gold.

Matthias Maier, one of the persons behind Bella Ciao, came down from Berlin and brought the bike to their Vienna dealer, Citybiker, where I was able to try it. Here is a nice picture of Matthias at one of my favourite cafes; it was nice to finally meet.

The unusual 2-speed hub is becoming popular for city cycling, and I was curious to try it. Vienna and Boston are both mostly flat until you get to the outskirts, but sometimes a single speed does not feel quite enough - making the Duomatic an appealing option.

The hub works via coaster-brake action: You push back with your feet lightly to shift gears (both to upshift and to downshift), and you push back harder to brake.

The thing that confused me initially, is that there appears to be no way to engage the coaster brake without first shifting to a different gear. That means that if you're in the lower gear already and want to brake, you will be switching into a higher gear right beforehand - and then starting in a high gear from a stop. However, I soon realised that I can simply switch back to the lower gear while stopped by tapping the pedal backwards gently with my foot. The bike does not have to be rolling in order to shift, and it takes very little pressure to do it.

While cycling, shifting gears with my feet did take some getting used to. It's very easy to do - just a  little backward tap - which is actually the problem. Those who've been riding coaster brake bikes for some time are accustomed to "feathering" the brake with their feet, and this has become an automatic motion for me. However, with the Duomatic hub that feathering motion is what shifts gears, so initially I found myself constantly switching gears without meaning to. I'd try to slow down, only to find myself in a different gear, and would then have to quickly back-tap again to regain my previous rhythm.

Having said that, I would describe learning how to operate the Duomatic hub as fun, rather than annoying. The fact that I was able to actually ride the bike through the very busy city center and intersections while navigating around tourists and cars made that clear. It was like nothing I'd experienced before, and of course it was disconcerting to find myself switching gears by accident - but also rather exciting to be able to both brake and shift with my feet.

I did make liberal use of the front brake at first, which, thankfully works very well on this bike.

It took me about an hour to get comfortable with the drivetrain. I decided to ride on the Danube Canal bikepath for a while, which would allow plenty of room to accelerate. I cycled all the way to the edge of Vienna and back, and by the time I returned to the center I felt like a Duomatic "expert." Of course when I got on my own bike later, I kept trying to shift gears with my feet - but never mind!

While I found the Duomatic fun, the real question is whether it's plausible as an actual everyday system. Overall, I'd give it a conditional yes, the conditions being that (1) you like bikes with coaster brakes. If you dislike them, then you will hate this hub, since it requires using your feet constantly. And (2) you are willing to accept a learning curve. No matter what system you're currently using, it will take your brain a little while to adjust to this one. In addition, I suggest that you consider the gearing carefully. Since the hub offers only two speeds, you can set it up as standard and low, or standard and high. The bicycle I rode had the latter setup, which I thought would be optimal for me - but wasn't. In practice, I would have found it more convenient to have a standard gear and a lower gear - but perhaps with the gearing slightly higher overall. That should be as simple as replacing a cog.

I know that some are considering the Sturmey Archer Duomatic for fixed gear frames that do not have a rear brake bridge. Personally I would only do this if you are planning to set up the bike with upright handlebars, as a roadbike position is very awkward with a coaster brake. It's up to you of course, but at least try it first. For myself, I see the Duomatic as very feasible for an upright city bike, and the lack of shifters on the handlebars is appealing. My feet are stronger than my hands, so this work nicely for me. But there is no doubt that this is an eccentric drivetrain, and not the sort of thing I'd enthusiastically recommend to everyone. Find a way to try it, if at all possible: You might love it - but if not, you'll at least experience something new. Many thanks to Bella Ciao and Citybiker in Vienna for making it possible for me to try the Duomatic.

Posted in: Bella Ciao, bicycle reviews, test rides, Vienna