Shopping for deep section wheels can be a tricky proposition, too deep and you'll get blown around like a sail in any crosswind and not deep enough and you won't reap the benefits of going aero. One thing is fairly universal in thought though, constructing the rims from carbon fiber as to boost stiffness and drop grams. So we've been patiently waiting for HED Cycling, one of the biggest names in bicycle aerodynamics, to release a full carbon clincher. Previous deep section wheels from the brand always opted for an aluminum rim bead, hook, and bed in the past, claiming they simply weren't convinced that heating up a carbon braking surface and thus the structure holding back 100psi of constant air pressure was the right application, but with disc brake setups gaining momentum and moving stopping duties over to a dedicated rotor, HED decided the time was right for a full-carbon tubeless clincher wheelset. So, the Vanquish 4 joins the V6 and V8 wheels in the lineup as its lowest profile option, ideal for climbing while HED's engineers crafted these carbon wheels with aerodynamics that rival numbers of other brands deeper options. HED's Vanquish rims are constructed with a meticulous level of quality in its Minnesota factory, where the carbon layups take on surgical precision. It features an optimized shape with internal and external widths that provide exceptional aerodynamic performance when paired with the now popular 23 to 28-millimeter wide and wider tires, so if your drop bar bike often embarks on off-road endeavors from time to time, you'll be covered. For die-hard gravel riders, you'll be pleased to find that the rims can take up to a 42mm tire for loads of traction and cushion over chunky gravel roads. This pairs with tubeless-ready technology that reduces rolling resistance for more speed over chip-seal and smooths rural roads to ward off undue fatigue. The tubeless-friendly setup grabs our attention for sure, but the real highlight of these wheels is its ...