Because the frame is made out of ****, thats why. The sixpack is a do it all bike, you will not notice the difference between a trail bike and a street bike.
Save up an extra week and get something that won't be cracked or bent after a hard day of riding.
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"the bus came by and I got on, that's when it all began...there was Cowboy Neal at the wheel of a bus to never-ever land."