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The Proton has been refined for 2019 just like the rest of the Fly mid-range bike line, The fork has been upgraded to a hydroformed 1-piece steerer tube. This bike now comes with a Trebol headset, a stronger 510 chain, bigger bars and a taller standover height, improving the overall look and feel, The cranks have been upgraded to the clean Trebol Bueno cranks. The 2019 Proton now comes equipped with four pegs, a shorter 13" rear end and shorter 28mm offset forks that is geared more toward the street riders out there!
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BMX BIKE SIZE GUIDE
BMX bikes are measured in two ways, the size of the wheel (20” is the standard BMX Wheel size) and the length of the frame which is gauged by the top tube measurement.
Below is a guide to what size you should be looking for. note there is some overlap in sizes as personal preference also comes into the equation.
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