The R4.A is derived from the award-winning Artech series and built from the same engineering DNA. This wheelset delivers best-in-class aerodynamics, a race-ready weight, and durability designed to last.Beyond its low weight and aerodynamic advantage, the R4 combines exceptional lateral stiffness with uncompromising durability. Its 25 mm internal width hooked rim is aerodynamically optimized for 30 mm clincher and tubeless tires, offering the perfect balance of rolling resistance, efficiency, and comfort. Meanwhile, the mechanical labyrinth system protects against dirt ingress, ensuring long-term reliability and consistent performance.