Venom Cannibal & Magnum Downhill Longboard Wheel [All Durometers & Sizes] THE INDUSTRY STANDARD FOR GRIP - Whether you're trying to race down mountain roads as fast as possible or cruise with your friend down your local run, Venom Downhill wheels will keep you locked in through corners. BUTTERY SMOOTH SLIDE - Venom Wheels are super grippy with their skin on but once broken in, they produce a super smooth slide to make you confident when drifting through corners. THREE DIFFERENT FORMULAS - STANDARD FORMULA: For all-around gripping and slipping. | MACH 1 FORMULA: If you're planning on winning every race. | HITP FORMULA: If you're trying to slide as far and as fast as possible. DUROMETERS - Standard Formula: 76a, 78a, 80a | MACH 1 Formula: 74a (Magnum Only), 76a | HITP Formula: 80a SPECIFICATIONS - 72mm x 60mm | 76mm x 62mm | 78mm x 70mm