What it is... Definitely caffeinated! The Rush is quick and fixed. Unlike the dedicated track racer, we've added brake mounts and a set of bottle cage braze-ons. Do anything you want with it except coast! Specifications Tange Prestige heat-treated CrMo steel; butted CrMo rear end Aggressive track-style geometry Horizontal track fork ends 120mm rear hub spacing Caliper brake mounts Matching flat-crown CrMo steel fork available as an option (38m rake) 1" size headtube 27.2mm seatpost size Max. tire size: 28c 49, 53, 55, 57, 59, 61cm (Center to top of seat collar) 4 lbs.