Shimano Disc Brake Set Rear Black BL-M4100(R), BR-MT420(R)

・SHIMANO Hydraulic Disc Brake performance
 »Versatile design matches numerous bike styles
  -Anodized Alloy 2/3-finger brake lever
 »Braking power adjusted for entry level riders
  -90% of MT400 kit
 »Accessible lever reach designed for small hands
  -Minimum reach 75 mm
・Reliable braking performance with less noise
 »Easy, quick and clean installation
  -Funnel bleeding
  -SHIMANO Hydraulic Mineral Oil
 »Less pad rattling noise
  -40% wider pad clearance