ENVE's new SES 4. 5 AR DT Swiss 240 Disc Brake Clincher Wheelset with DT Swiss 240 Hubs was originally inspired by the necessity of running beefy road tires on grueling European cobbles and a desire to avoid the usual aerodynamic sacrifices and questionable handling caused when pairing big tires with skinny rims. Compared to the OG SES 4. 5, which is designed around 23-25mm tires, the 4. 5 AR profiles are built to pair with plush 28-30mm tires for extra cushion across jarring surfaces and--counterintuitively--increased speed when the smooth pavement returns. This wheelset serves the ever-growing segment of riders searching for wheels with multi-surface versatility to expand their ride routes to spur-of-the-moment surface changes. The AR initialism stands for All Road, but these wheels (and the generous tires they accommodate) are built to keep going even after all roads end. We would be remiss to categorize these as just a wider version of the 4. 5 though, as ENVE engineers created a whole new carbon layup. The new lay-up makes the most out of the 4. 5 AR's 25mm internal rim width, disc-specific hub pairing, and multi-surface utility. ENVE understandably guards the specifics of its layups closely, but if its other proven rim designs are any indicator, this wheelset is sure to withstand all manner of aging pavement, graded gravel, and even singletrack with snappy speed and stability. Another tweak to the usual road design is the inclusion of a hookless bead, which is inspired by ENVE's mountain rims and increases tubeless reliability with a clean tire to rim interaction. Even with all those changes, the 4. 5 AR sees a continuation of ENVE's now signature offset front and rear rim depths by featuring a 49mm front and 55mm rear rim. Like with the standard 4. 5, these depths inhabit in the sweet spot between the more climbing oriented 3. 4 and TT/crit-leaning 6. 7 wheelsets. With wind tunnel and real world testing to back up claims that these wheels will hold steady...