Subrosa arum bmx bikethe arum has always been about the look this line has a reputation for being the wildest looking bikes in subrosas line and always pairs a wild colour scheme with high end materials and killer component packages this year it is all about letting the bike shine in more subtle tones highlights include subrosa shred sprocket subrosa uplift stem subrosa classic seat shadow valor tyres shadow chula grips shadow alfred clamp and rant sealed hubs features size