Shimano XT 4-Piston Calliper, Post Mount The Shimano XT 4-Piston Calliper, Post Mount offers high performance hydraulic braking for all conditions. Designed for both front and rear wheel use, it fits International Standard or Post mount with the necessary adapters (not included). Key Features 4 oversized phenolic pistons for optimal heat insulation, lightweight, and stiffness Opposed 4-piston design for reduced leading effect and improved pad wear, enhancing braking control Increased pad to rotor clearance to minimise rotor drag in muddy conditions Lightweight and rigid forged calliper design One way internal fluid circuit for easy bleeding Uses mineral oil brake fluid, which is non-corrosive and less hazardous than conventional hydraulic fluids Shim-less mounting bracket for quick installation and setup Recommended with Ice Tech Center Lock rotors for optimal braking performance Includes N03A resin pads with fins Compatible with Ice Tech pads in resin or sintered compound; optional aluminium radiation fin pad reduces brake surface temperature by 50°C The Shimano XT 4-Piston Calliper, Post Mount is engineered for cyclists seeking reliable and efficient braking. Its advanced design ensures consistent performance, making it a great choice for mountain biking enthusiasts.