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Singlespeed
From WikiPedalia
While any bike that doesn't have multiple gears is technically a "single-speed" bike, current use of the joined word "singlespeed" generally refers to a bike with a one-speed freewheel and hand brakes, distinct from both one-speed cruisers (these have coaster brakes, not freewheels) and fixed-gear machines.
See my Article on Singlespeed Mountain Bikes
(As far as I know, I was the first to deliberately remove the multiple-speed gearing from a mountain bike to make it simpler, lighter and more reliable...if I do say so myself!)
