I like coaster brakes on city bikes and I am very comfortable using them. My preferred transportation bike set-up is to have a coaster brake in the rear and a hand-operated hub or rim brake in the front. Typically I use just the coaster brake most of the time, employing the hand-operated front brake to keep the bike still when coming to a complete stop or to supplement the coaster when braking at high speeds. The role my front brake plays in these scenarios is small, but crucial - which I realise more than ever when riding the
coaster brake-only Sogreni I picked up last week.
Slowing down on the coaster brake-only bike is exactly the same as on my own bikes - I'd be using the coaster brake alone for this anyhow. But coming to a complete stop and keeping the bike still when stopped is trickier without a front brake. The main thing I've had to learn is not to ease up on the coaster brake when stopping as I normally do, but to continue pushing back on the pedal with the right foot firmly even as I put the left toe down at a stop. If I ease up the pressure on the right pedal, the bike will keep rolling forward. Coming to a complete stop on a downhill is trickier still, because the bike really, really wants to roll forward and my right foot has to push back with all the force I can muster. Squeezing a front lever is much easier in this context.
Stop-and-go traffic presents its own challenge, because a coaster brake can only be engaged effectively from certain crank positions. There is also the transition from having the right crank in the optimal braking position (previous 2 pictures) to having it in the starting position. To transition to the starting position from the braking position, I quickly hook my right foot under the pedal and move it forward as I push off to get started. But once the pedal is in the starting position, what if I then have to immediately stop again? Inching forward in traffic is tricky, because it is difficult to keep the pedals in a position where I can both stop and get the bike started again with equal immediacy.
Finally, there is the question of speed. When going over 13mph or so, I find that I cannot brake as well as I'd like with just the coaster brake alone. The coaster brake is enough to slow down, but for an emergency stop at that speed I need a front brake to supplement.
Riding a coaster brake-only bike is certainly possible, but in a city like Boston I feel that it is safer to also have a front hand-operated brake. The motivation behind bikes without front brakes today seems to be the "clean handlebars" look, which has always baffled me. I fail to see what is so gorgeous about not having a brake lever on my handlebars, when that brake performs an obvious and necessary function.
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