The Tech 4 uses all new internal sealing for reduced friction and the pivot spins on roller bearings, allowing the spring rate to be reduced. The lower spring rate in turn gives a lighter lever action, reducing rider fatigue and keeping our legendary feel and modulation The updated E4 caliper utilizes hybrid style stainless steel pistons with a phenolic insert allowing for smoother movement and less maintenance, while still able to manage high temperatures without heat transfer during extreme use Lever shape updated to provide a more ergonomic shape orientated to provide the best mechanical advantage during braking Master cylinder includes reach and bite point control adjustability (BPC) and the piston is actuated by a cam and roller system to eliminate free play and friction Split clamp is designed to reduce clutter and create more space for handlebar mounted devices (directly compatible with Shimano ISpec shifters) One piece 4piston caliper is CNC machined from a solid billet of 2014 T6 aircraft spec aluminum alloy and uses identical 16mm phenolic pistons which gives more usable power to the brake while keeping the legendary feel Includes: lever assembly, prebled (black) hose with stainless fittings, (74mm) caliper Black plastic hose comes standard. Use HT1050 for upgrade to braided stainless steel hose Hose is precut to front/rear lengths (950mm front, 1500mm rear) but do not include extra fittings if lines need to be cut or internally routed. Use HT-1035 (olive), HT-1036 (insert), and HT-1037/8 (copper washer) *Rotors and adapters sold separately