Shimano Dura Ace WH-R9370 C50 Wheelset

Developed with WorldTour pros and triathletes under Shimano’s “Science of Speed” philosophy, the WH-R9370 series improves on weight, aerodynamics, stiffness, and maintenance versus the previous generation. All models are optimized for 28–30mm tires and feature a redesigned hub with replaceable cup-and-cone bearings.

WH-R9370 C50 (all-rounder wheel):

Balanced combination of low weight, aerodynamics, and stiffness — ideal for varied race courses

Weight :
159g lighter than the previous version
More agile handling, faster acceleration, better climbing, no loss in stability or durability

Aerodynamics:
23mm inner width; 31mm outer width (front) / 32mm outer width (rear) — asymmetric front/rear profile for optimized aero performance
Developed via flow simulation and real-world testing (not just wind tunnel conditions)
Up to 2.7 watts less drag at 48 km/h with 30mm tires vs. previous model

Aero Carbon Spokes:
New 4×1.1mm carbon spoke profile — reduces both weight and drag

Hubs:
Retains proven cup-and-cone bearing system, now with replaceable bearings for easier maintenance
~30% less rotational friction than conventional industrial bearings (per Shimano’s comparative testing)