This is a city bike. There's probably no need for a bashguard. There's probably no need for a chain keeper either--the only time I've had a chain fall onto my bottom bracket was from shifting from the middle ring to the inner ring on my mountain bike with a misadjusted front derailleur. None of my bikes' chains have ever just fallen off a chainring while not shifting. My advice: get some short BMX/track bolts and ride the damn thing.