On the eve of the Eurobike cycling industry trade show in Germany, ENVE introduced its new SES 4.5 AR Disc. The new offering is part of the Utah-based company’s Smart ENVE System aero road wheel lineup.
The SES 4.5 AR Disc is available in a tubular model that’s claimed to be aerodynamically optimized for use with 30c tubular tires and a hookless-bead tubeless clincher model designed for use with 28c clincher style tubeless road tires. Price starts at $2700.
“We developed this wheel to bring aerodynamics back into the equation for professionals on Team Dimension Data racing the Spring Classics. Consequently, the benefits of this wheel extend directly to cyclists of all abilities who frequently ride on old, broken, or otherwise less than perfect road surfaces,” explained ENVE director of marketing, Jake Pantone. “In 2015 we went to France to test wheelsets with Team Dimension Data on the cobbles of Paris-Roubaix. This experience was the catalyst that kicked off the project to bring wheel aerodynamics into classics racing.”
That rationale is that in a race that is won or lost on the courses with nearly 50 kilometers of cobblestones, riders are forced to run large volume 30c tires. However, the remaining ~200 kilometers are carried out on well-maintained asphalt. On these open roads, those same 30c tires cause costly losses in aerodynamic efficiency, stability, and rolling resistance because they are mounted to
rims developed for 23-25c tires.
In 2016, SES 4.5 AR Tubular prototypes were raced at Paris-Roubaix under Team Dimension Data before the UCI reversed course and barred disc brake-equipped bikes from pro-level competition.
“Disc brake road frames with increased tire clearance have given us the opportunity to design front and rear rim shapes that better manage the airflow around wider tires and significantly reduce flow separation,” said ENVE aerodynamicist Simon Smart. “Traditionally, riders are faced with a big trade-off in aerodynamics when opting for the superior grip, rolling resistance, comfort and ride-ability of the high volume tires on rough surfaces.”
The SES 4.5 AR Disc, claims ENVE, is a unique blend of SES disc brake specific technologies and ENVE’s mountain rim technologies. For example, the SES 4.5 AR Disc features a tubeless specific hookless bead design for refined tubeless performance, and it features dissimilar rim geometry and shapes between the front and back rims. The front rim is 49mm deep and 31.2mm wide, while the back rim is 55mm deep and 30.5mm wide. Both rims feature an internal rim width of 25mm.
“At first we weren’t sure the concept would even work,” admitted Pantone. “But we not only found out that it does work, but that it works way better than any of us imagined it would… These are the future. Wide, aero, comfortable, and really fast.”
[vimeo width=”610″ height=”343″]https://vimeo.com/180675573[/vimeo]
For more info please visit enve.com.