Shimano Deore BL-M4100 / BR-MT420

BL-M4100 Intuitive and powerful braking Quicker brake engagement with shorter free stroke Rider tunable and action-optimized cockpit High-performance brake control Additional contact point for a stiffer brake lever 10 deg. rotation angle setting range for I-SPEC EV shifting leverBR-MT420 90% braking power vs. BR-MT520 20% increase braking power vs. current 2-piston BR-MT400 150% better wear-resistance vs. current 2-piston BR-MT400 Brake pad: resin, metal Pre-assembled and bled brake lever and caliper, with SM-BH59-SS hose & mineral oil Without rotor and adapter One-way bleeding system Attributes Fluid Mineral oil Brake Material Aluminum Caliper mount Post mount Disc Diameter Not included Lever Blade Material Aluminum Pistons 4 Primary Color Black