Shimano BR BR-M8120 4-Piston Brake Set Front + Rear Resin Metal Black MTB The SHIMANO DEORE XT M8120 caliper features consistent braking performance and reliable stopping power in all conditions. The 4-piston caliper instills greater downhill confidence and control. FEATURE Quicker Piston retraction Reduces disc brake rotor wobbling noise and increases braking power by 10% (vs. M8000) Four Piston Banjo type connection and inside hose routing Hose Length: 850/1600mm BENEFIT Superior modulation gives you greater control High braking power instills greater downhill confidence and control Quick and easy assembly **Depending on the size rotors you are using you may need an additional post mount or is mount adapter to fit these calipers to your application. Please contact us and we can provide them in your order for an additional charge.** If you need Olive insert (for changing the rear hose length), please contact us before placing order ***These are OEM Shimano Parts, Brand new, Never Installed on Bike, Never used in any way, just NOT in retail packaging.***