The CTX52 is crafted with a perfectly balanced disc brake design for road and cyclocross. Carbon tubulars are the premium race weapon, offering the lightest, smoothest, and fastest wheel set option. Alto tubulars are the most balanced wheels on the market: designed to accelerate quickly, roll as smooth as silk, and inspire confidence through corners. You'll find authentic NSK ABEC7 DDU sealed bearings in our CTX52 wheels, designed for the longest lifespan in any conditions! Proven race wheels, built to deliver you to the finish line first.fespan in the wettest conditions! Proven race wheels, built to deliver you to the finish line first.