Torque TANK M1 All Surface Gym SledLooking for a gym sled thats built for anywhere and everywhere? Meet the TANK M1 All Surface Sled, a game changer in portable resistance training. While it might not literally go everywhere, it does go where most sleds can't think grass, tarmac, concrete, and more. Unlike traditional sleds that rely on weight plates to generate resistance, the TANK M1 features built in magnetic resistance, requiring just one bumper plate to get started. That means