Eh. You can mostly run fixed on horizontal road drop outs just fine provided you torque down the track hub bolts enough, as the bulk of road conversions makes clear. The real issue is that 75mm BB drop - it's on the floor, relatively speaking. If you ever have to make an emergency turn to avoid something, you're nearly guaranteed to crash yourself out or at least catch air via pedal strike unless you're riding Speedplays with 160mm cranks.