Originally Posted by Syscrush

What Tejano said.

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I'm no distance master, but I have done century rides two days in a row on my Sputnik. For me, the biggest issue with riding those longer distances fixed was something I didn't expect - my ass got really sore. Because it's hard to stand up and ride at an easy pace on level ground or downhill, you only get to stretch your legs out a bit and get out of the saddle for some relief when you are climbing. The positive side-effect of that is that it can make you REALLY happy to see a hill you have to climb!