Easton EC90 SL Carbon Road Rear Wheel. This is the medium depth aerodynamic road rear wheel that you've been waiting for. The Easton EC90 SL Carbon takes their proven Fantom rim shape and scales it down to a shallower 38mm depth. This rear wheel offers fierce acceleration, smooth and dependable braking, plus impressive aerodynamics. From the spring classics to rough and tumble cyclocross racing, you'll be hard pressed to find a condition where the EC90 SL is out of its element. The wheel is also certified Road Tubeless plus is entirely built by hand from start to finish and acoustically tuned. The EC90 SL rear wheel combines top end materials, a methodical build, and the award winning Easton Echo hub.