Cura4 Brake System With the Cura4, we set an ambitious goal to surpass our own expectations. Our mission was clear from the start: to create a brake that offers unmatched power and performance, crafted from the highest quality materials and accessible to a wide range of cyclists. The four 18mm diameter pistons deliver unprecedented stopping power, while the expanded friction surface of the pads and increased thickness ensure flawless modulation. With Cura4, you gain maximum control over your braking force. The optimized roll-back feature provides that exceptional lever feel that has made Cura renowned. Built from the same high-quality materials as its smaller sibling, the Cura, the Cura4 is fully forged and anodized, ensuring structural integrity, long-term reliability, and lightweight performance.