Features include: Isopulse lacing coupled with asymmetrical rim, optimized bearings positioning, fore drilling = no holes in the upper wall of the rim = no weakness, carbon front hub body, exclusive Maxtal alloy rim, ISM interspoke milling, 22 mm front rim height, radial laced front wheel. This wheelset is sold as an upgrade, and if purchased, will be provided in lieu of our standard Mavic Aksium training wheelset.