Crank arms are an issue here, but our steepest track is 51 degrees. Just check that along with bottom bracket height on the steepest track you go to. Can you stand the bike vertical on the inside of the turn without hitting the track? Kinda sucks when you do (it lifts the rear wheel off the track in the middle of the turn). My first bike had a 62mm BB drop, and that was a PITA even with short cranks on a 44degree track.