Say what you like about e-bikes, but their increased weight and higher speeds have brought along a new wave of components that translate wonderfully to aggressive trail bikes. The Shimano BR-M520 / BL-MT501 Hydraulic Disc Brake with Metal Pad is an example, delivering four-piston stopping power at an amazing price point. Bulletproof durability, precise modulation, and all the power you'll need--whether you're riding with a motor or not. In left (front) and right (rear) options.