What gear ratio would you choose for riding with a pack of roadies? I happened upon a big pack of roadies the other day on my fixie and I hung with them for awhile with 76 inches on rolling hills. Ultimately, however, it was very challenging keeping up. Natrually, group rides are faster than solo rides, and I was spining like crazy in the draft at about 25-27 mph and on the descents which got up to 34 mph at one point. I could have hung with these guys forever on my geared roadie, but I would definately need a higher gear with a fixie, maybe something in the low 80s. Any of you more roadie oriented fixie guys have experience riding fixed with fast packs of roadies?