Easton EC90 Aero 55 Carbon Road Rear Wheel. The Easton EC90 Aero 55 Carbon Road Rear Wheel has everything the discerning, performance minded cyclist demands: leading aerodynamics, certified road tubeless compatibility without rim strips, unrivaled braking performance, outstanding durability, and competitive weight. The Fantom rim steals the spotlight with its wide profile 19mm internal rim width, deep cross section 55mm deep, and round nose that keeps them stable in crosswinds. You will not find a faster clincher in this category and Easton's conducted the wind tunnel testing to prove it. Additionally, this the one and only carbon clincher rear wheel with certified road tubeless compatibility. The EC90's hub is the superb Easton Echo that's a masterpiece of durability and efficiency. Additionally, the wheel features 20 Sapim CX Ray bladed spokes to help this wheel slice through the air with the greatest of ease. And to complete the wheelset, pair this rear wheel with the Easton EC90 Aero 55 Carbon Road Front Wheel item EA C90AF.