What Our Gearhead® Experts Are Saying:"I’ve used the Metron 81 SLs for long-course tri and local time trials—they're stiff, stable, and surprisingly composed in crosswinds. You’ll feel the speed, especially when you're locked into aero and pushing max watts."We ride the Vision Metron 81 TL Wheelset when aerodynamic performance isn’t a luxury—it’s a necessity. Designed specifically for triathletes and time trialists chasing every watt, these deep-dish carbon wheels cut through wind with precision and bring proven podium pedigree to race day. The 81mm depth paired with a 19mm internal width offers excellent support for modern road tires, while CFD and wind tunnel-tested shaping ensure optimized aerodynamics across real-world yaw angles. Six sealed cartridge bearings and Vision’s P. R. A. hub system provide smooth, efficient rolling and preload adjustability without disassembly. For us, it’s not just about going fast—it’s about staying in control when the pressure is on.