The V4 vented rotor is specifically for use with the Hope Tech V4 Evo brake as it is slightly wider than the standard floating Hope rotors this rotor will not fit into any other Hope caliper in the range. The vented rotor is designed specifically for our Tech V series brakesThe rotor uses internal fins to allow the air to flow between the two friction partsThe induced air flow significantly reduces heat build up in the rotorFantastic and consistent braking performance in wet conditions thanks to its capability to clear the water layer through its finsDyno tests show up to 15% less heat build up compared to our floating rotors6 BoltWeight 203mm: 288gThe V4 rotor effectively reduces the temperature of the disc by up to 15% and enables superior braking performance when the going really gets tough on steep Alpine descents and on the worlds toughest downhill tracks.The V4 rotor also gives exceptional braking performance in wet conditions as its fins enable water and moisture to be shed consistently keeping the braking the surface dry and ready for when you slam the anchors on when hurtling towards a berm at break neck speeds.