The Subrosa Rose BMX Cranks at J&R Bicycles are built tough out of specially treated alloys and smart engineering and feature an included bottom bracket. This slim design with a custom shape is constructed from 4130 chromoly that has been heat-treated post weld with the Death Proof treatment. The one-piece spindle bosses are CNC machined add even more strength and so do the oversized welds throughout. The included BB features a crush-proof steel inner spacer, 6061 aluminum caps and R12 bearings to keep your pedal action nice and smooth.

SPECIFICATIONS:

• SIZES: 160mm, 165mm, 170mm, 175mm
• 4130 chromoly custom shape with oversize welds
• Post weld Death Proof heat treatment
• 1-piece CNC spindle bosses
• Hollow 19mm / 48 spline spindle
• WEIGHT: 31.4 oz
• COLORS: Black

INCLUDED BB SPECIFICATIONS:

• 19mm mid
• Crush proof steel inner spacer
• 6061 Alloy Caps
• R12 bearings
• Weight: 7.1 oz
• Colors: Black