On bicycles with internally geared hubs, we typically see two types of gear shifters. The trigger shifter (pictured above) is a small gadget with a lever that is moved up and down. Today, this style of shifter usually accompanies
Sturmey Archer hubs (though in Europe I have seen some lesser known models as well).
The twist shifter (pictured above) is a plastic and rubber enclosure that is built into the handlebar grip itself. To switch gears, you grab the rubber part and twist forward or backward. This style of shifter usually accompanies
Shimano hubs.
After using both types of shifters on various bicycles I've owned to more or less the same extent, I have developed a strong preference for trigger shifters. When I tell people this, they tend to assume it has to do with "vintage aesthetics" - but actually, it has to do with comfort. A trigger shifter takes up very little space on the handlebars, as it is attached with a narrow bracket. This means that the shifter does not interfere with the gripping area, and allows me to install full-length grips on the handlebars.
By contrast, having a twist shifter installed effectively cuts your gripping area in half. Notice that the right handlebar grip on the
Bella Ciao above is shorter than the left grip - necessary in order to make room for the shifter. Granted, you can also keep your right hand on the rubber portion of the shifter itself - but it's not very comfortable, especially as there is a tactile break between where the real grip ends and the shifter begins.
But why is it important how long your grips are, as long as you are able to fit your hands on them? The reason, is that having room to move your hands around on the handlebars, even a little, can be essential for hand comfort - especially on long rides. If you ride your bicycle for just a couple of miles or so at a time, then you might not get the urge to move your hands around. But the longer your ride is, the more fatigued your hands will get if you keep them in the same position. Some people are more sensitive to this than others, and those who have nerve damage in their hands (like yours truly) are particularly prone to it. The feeling can range from numbness, to "pins and needles" to a more severe sensation of electric current running through the hand. It is not good to experience this problem, and having room on the handlebars to move your hands around allows you to avoid it. Long grips can also help you switch between a more relaxed and a more aggressive position on your bike (by holding the grips further forward or further backward) - giving you some added control over speed.
Getting back to shifter styles, here is my right hand on the shortened grip that is integrated with the twist shifter on my
Bella Ciao. As you can see, my hand covers the entire grip, with no room to move around - unless I place it on the shifter itself, though even then it is limited. And I had the same problem with
this shifter on my previously-owned
Pashley, which came with the 7-speed
Shimano hub I innocently selected.
On the other hand, here is my hand on the grip I installed on my
Gazelle. As you can see, there is room for another handful - which is only possible because of the trigger shifter.
I will note that one benefit of the twist shifter, is that it is more integrated with your hand position - which can be a plus if you switch gears very frequently. But on bicycles with internally geared hubs - especially 3-speeds - I have found that I tend to stay in one "ideal" gear most of the time, switching to a lower gear only when going uphill, and switching to a higher gear only when cycling very fast or downhill. Having to reach with my finger to pull the trigger has not caused me any inconvenience in comparison to using the twist shifter. Your experience, of course, may differ.
While I am not suggesting that everybody ought to run out and demand trigger shifters with their 3-speed bicycles, I am hoping that this comparison will provide some food for thought to those who are getting a new bike, or deciding which hub to select with a new build. I would also like to ask whether anybody knows where I can find a trigger shifter that is compatible with a 3-speed
Shimano Nexus hub? Even if it involves rigging something up with a "thumbie" derailleur-style shifter, I am up for it. Thanks in advance for any advice.
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