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I recently bought off craigslist one of these GMC Denali road bikes for 80 bucks to find out if cycling is my thing or not. And well, I fell in love with it.
My question is: does anyone know how fast is the top gear on these bikes? I understand most of the speed will come out from my effort, but even pedaling full speed I've caught myself barely reaching 20 mph.
It has a flywheel instead of a cassette. Do cassette deliver a higher top speed? Are there flywheels that could improve that?