Easton ec90 aero 55 road rear wheel tubularas light as a climbing wheel faster than a tt wheel stronger than a training wheel the all new ec90 aero 55 absolutely blows the doors off of every race wheel on the market weve combined the most aerodynamic road rim ever made to our durable new echo hub the result delivers the best attributes of any wheelset with zero compromise whether youre an ironman triathlete a stage racer a hill climber or a sprinter this wheel is as good as it gets