While it isn't always present on race day, Mavic's Ksyrium Pro Exalith Clincher Wheelset certainly sees more than its fair share of the base miles of spring that lead up to the start lines of summer. In addition to the obvious benefits of training on clinchers, the wheelset's key selling point in treacherous shoulder seasons is the Exalith II brake track, which involves a deep penetrating chemical treatment process akin to anodization that gives the rims their signature, dark pallor and boosts stopping power. Compared to the previous generation of Exalith, Exalith II further increases braking by a claimed 18% in wet conditions, and the new padbrake track interface reduces engagement noise. The Ksyrium line has gradually expanded over the years. It includes no fewer than 14 current iterations, but certain elements are constant across the Ksyrium family. The rims are made from Mavic's Maxtal alloy, which is 30% more resistant to fatigue and weighs less than traditional, 6106 aluminum. They're laced to the hubs with Zicral spokes in Mavic's Isopulse pattern, which involves radially lacing on the drive side and crossed two lacing on the non drive side to account for the inherently asymmetrical power transmission of a bike's drivetrain. The hubs house Mavic's QRM bearings and FTS L freehub in a carbon body front a departure from most other Ksyriums and an aluminum body rear, and the bearings are adjustable with an Allen key and Mavic's included wrench. Unlike the standard, non Exalith Ksyrium Pro, the Ksyrium Pro Exalith maintains the traditional Ksyriums' internal width of 15mm. This amounts to a claimed 80g weight loss in rotational mass, so the wheels spin up faster out of corners and while punching it on climbs. This weight loss is despite the fact that Mavic gives the Ksyrium Pro Exalith's rim the Inter Spoke Milling 3 Dimensions ISM 3D treatment instead of the latest ISM 4D. Still, ISM 3D manages to contribute to the wheelset's low claimed weight by ...