Subrosa arum xl 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 the xl version features a larger frame with 21 top tube highlights include subrosa shred sprocket subrosa uplift stem subrosa classic seat shadow valor tyres shadow chula grips