Mavic Ksyrium SLE Wheel System Black, Shimano/SRAM Stiff and strong Zicral spokes, front and rear, Isopulse lacing for greater wheel stability, New Yks Extralight ISM 3D rims Strong rim: Maxtal alloy, Fore drilling, High quality adjustable bearings: QRM+ Refined Zicral spokes Weight : 1395 grams (pair of wheel)