Ventus Prime 4. Best-fit driving control and a comfortable ride Uniform footprint pressure. Safer driving while on wet roads by improved dumping characteristics on the surface of the road. Low Noise Technology. Safer driving while on wet roads by minimising the small bumpy holes on the surface of the tyre. RO (Round Optimisation). By increasing the total number of pitches, the impact on the road surface. Zigzag 3D Tread Technology. This is advantageous for dry performance by increasing the friction force of the block according to the deformation. With Chamfer. By increasing the total number of pitches, the impact on the road surface is minimised providing a more comfortable ride. *By request/order.