I ride 42x17 on my daily commute, it's somewhat hilly. I ride probably 75 miles a week, no other real training. I ride my fixed gear almost exclusively since last fall.

Should I get a bigger chainring and bust out the 180 miles (2 days) on my fixed gear, or should I wimp out and ride the road bike? I guess I could also add a SS to my rear wheel (it's flip-flop) just in case...

the bike