WH-R8170 TL carbon clincher disc brake designed to meet pro road race criteria. Lightweight clincher full carbon 60 mm deep rim for improved aerodynamics, increased rigidity and excellent inertia for sprinters and TT specialists. Stainless steel butted (2.0-1.8-2.0) and bladed straight pull spokes for optimal balance and rigidity. Elbow-less spokes make for a strong yet compliant wheel. High lateral rigidity is produced with a wide flange spacing. Labyrinth double-contact sealing effectively shuts out water and dirt. Alloy cone with integrated steel Borozon treated bearing races - super mirror finish reduces friction. Cold forged, machined aluminium hub shell and oversized 7075 alloy axle keep the wheel weight to a minimum.