The M4 is a 4 piston brake system from Clarks. Their most powerful production brake produced to date the M4 is lightweight with a slimline design and 4x16mm pistons per calliper each delivering smooth powerful modulated braking force at the rotors. Perfect for all riding conditions encountered by the adventurous downhill rider and e-bikes the M4 is the ideal brake system for more challenging environments. Technical specifications Pre-bled and ready to ride 4 Piston hydraulic brake system for MTB and downhill riders Lightweight design with a high quality finish 4x Self adjusting pistons 16mm pistons 12mm Lever pistons 2 Finger lever Lever reach adjustment to suit all hand sizes International standard and Post mount fit Mineral oil fluid Material: Stainless steel rotors Spare olives to allow for hose reduction Weight: 240g Complies with and exceeds EN 15194 and ISO 4210 standards Box Contents X2 Calipers X2 Levers X2 Rotors and bolts X2 Pads and hoses