Before the introduction of the SES 4. 5s, ENVE undeniably had an impressively strong lineup of carbon wheels, but it lacked one all around wheelset that could be used in almost any situation, a design that could adapt seamlessly to different rides. We aren't surprised that ENVE identified that gap and set out to fill it, creating the 4. 5s to fill the void so perfectly between the 3. 4s and 6. 7s that it would appear as if it planned it that way all along. This year, the 4. 5s continue to offer the same ability to dance up climbs and blast through the flats as when they debuted, now with even more control delivered by ENVE's Generation 2 brake track. New this year, ENVE graces the SES 4. 5 with the Generation 2 brake track, a carbon fiber surface that first appeared on the SES 2. 2 and claims equally improved stopping power in both wet and dry conditions. The more rugged texture of the track gives it an increase in power of up to 30%, according to ENVE, and is designed to pair with a new brake pad as well. For the rim itself, ENVE continues to trust the demonstrated success of the original wheel dimensions on the SES 4. 5, which doesn't follow static, arbitrary widths and shapes. Rather, ENVE's engineers designed the rims' dimensions with the goal of reducing lateral forces and increasing aerodynamic benefits across a wide range of yaw angles to create what we see as their most versatile wheelset yet. The front wheel and rear wheel each has its own individual dimensions to account for differences in their behavior, translating to a front wheel that measures 48mm deep and 27mm wide, and a deeper, slimmer rear wheel shaped to 56mm deep and 25. 5mm wide. This design lends stability to the more exposed front wheel, while the rear wheel uses its more protected position to deliver strong aerodynamic gains. Number aside, these dimensions allow the SES 4. 5 to handle crosswinds and gusts with the confident stability of a wheelset half its depth by building up a side f...