![2-piston or 4-piston? Testing & comparing Shimano's brand new XTR disc brakes - Singletrack World Magazine 2-piston or 4-piston? Testing & comparing Shimano's brand new XTR disc brakes - Singletrack World Magazine](https://singletrackworld.com/wp-content/blogs.dir/1/files/2018/06/stw-2018-06-28-IKS2521.jpg)
2-piston or 4-piston? Testing & comparing Shimano's brand new XTR disc brakes - Singletrack World Magazine
![Shimano XTR BL-M9120, BR-M9120 Disc Brake and Lever - Wheel World Bike Shops - Road Bikes, Mountain Bikes, Bicycle Parts and Accessories. Parts & Bike Closeouts! Shimano XTR BL-M9120, BR-M9120 Disc Brake and Lever - Wheel World Bike Shops - Road Bikes, Mountain Bikes, Bicycle Parts and Accessories. Parts & Bike Closeouts!](https://www.sefiles.net/images/library/large/shimano-xtr-bl-m9120-br-m9120-disc-brake-and-lever-374598-1.jpg)
Shimano XTR BL-M9120, BR-M9120 Disc Brake and Lever - Wheel World Bike Shops - Road Bikes, Mountain Bikes, Bicycle Parts and Accessories. Parts & Bike Closeouts!
![2-piston or 4-piston? Testing & comparing Shimano's brand new XTR disc brakes - Singletrack World Magazine 2-piston or 4-piston? Testing & comparing Shimano's brand new XTR disc brakes - Singletrack World Magazine](https://singletrackworld.com/wp-content/blogs.dir/1/files/2018/06/stw-2018-06-28-XTR-Featred-Img-1550x720.jpg)
2-piston or 4-piston? Testing & comparing Shimano's brand new XTR disc brakes - Singletrack World Magazine
![Shimano XTR BL-M9120 + BR-M9120 Enduro / Trail Hydraulic Disc Brake - I-Spec EV - J-Kit - Set FW + RW Shimano XTR BL-M9120 + BR-M9120 Enduro / Trail Hydraulic Disc Brake - I-Spec EV - J-Kit - Set FW + RW](https://images.bike24.com/i/mb/f3/cc/66/271484-00-d-542870.jpg)