ER 1600 SPLINE® Ride faster and further with this ideal upgrade for your bike. On these endurance wheels, it's easy to lose track of time. The combination of comfort and grip is created by the 22 mm internal rim width. This ensures better support for wider tires – your plans can easily change, and your ride can be extended. You'll feel the quick engagement of the 36T SL ratchet of the 350 hub when you take off. Combined with strong spokes, even technically demanding roads will glide beneath you. The wheels are available in two different rim heights of 23 mm and 30 mm. The higher rim has been aerodynamically optimized so you can ride further (or faster), depending on your preference. ER 1600 SPLINE 23: Makes you barely feel the hills that stand in your way. ER 1600 SPLINE 30: The aerodynamic design helps you reach top speeds even in stronger winds.