Overview
The Torque Fitness TANK™ M4 is a premier, all-surface push sled that redefines resistance training through magnetic braking technology. Unlike traditional friction-based sleds (Prowlers) that require heavy iron plates to create resistance, the TANK M4 uses a fan-like magnetic system: the faster you push, the harder it fights back. Designed for bi-directional use, it eliminates the need to turn the unit around, making it a high-efficiency tool for HIIT, metabolic conditioning, and power development on any surface from turf to concrete.
Product Page: Torque Fitness TANK M4 | Rogue Fitness
Key Features and Specifications
Resistance System: Mag-Force™ Resistance. Features 3 pre-set levels of magnetic resistance that increase automatically as speed increases.
Bi-Directional Design: Dual independent braking systems and performance handles at both ends allow for pushing and pulling in either direction without rotating the sled.
All-Surface Tires: Four oversized, non-marking rubber tires allow for nearly silent use on grass, turf, asphalt, and even indoor hardwood or carpet.
Accessory Tray: Built-in central storage tray for carrying kettlebells, towels, or TANK accessories.
Construction: Heavy-duty steel frame with an electrostatic powder coat for all-weather durability.
Dimensions: 52.4” L x 31.9” W x 37.1” H.
Weight: 198 lbs (89.8 kg).
Tire Pressure: Recommended 30 PSI (2.07 BAR).
Performance Benefits
Magnetic vs. Friction: Unlike standard sleds that are hardest to start and get easier as they move, the TANK is easy to start and becomes progressively harder with speed. This mimics real-world athletic acceleration.
Deceleration Training: The M4 is a world-class tool for training deceleration—a critical component in injury prevention for field sports.
H.I.I.T. Efficiency: Studies suggest 14 minutes of TANK training can provide a stimulus comparable to an hour on a treadmill, focusing on explosive power and high-intensity intervals.
Joint-Friendly Strength: Because the resistance is magnetic rather than weight-based, it provides a "smooth" feel that is gentle on the joints while still taxing the cardiovascular system and muscles.
Maintenance and Care
Tire Inflation: Maintain an even 30 PSI in all four tires. Uneven pressure is the #1 cause of the sled "veering" to one side during use.
Surface Cleaning: Wipe down the frame and handles with a damp cloth or non-abrasive gym wipes. The electrostatic paint is weather-resistant, but clearing mud and salt after outdoor use will extend the life of the finish.
Brake Inspection: The magnetic brakes are zero-maintenance; however, ensure the resistance levers move freely and click into their 1-3 settings.
Storage: While built for all-weather use, storing the unit indoors or under a cover when not in use will protect the rubber tires and grips from UV degradation.
Warranty Information
Frame and Welds: 10 Years.
Hardware, Bearings, and Bushings: 1 Year.
Paint/Finish: 1 Year.
Wear Items (Tires, Grips, etc.): 90 Days.
Labor: 1 Year (when applicable via authorized service).
Frequently Asked Questions
Q: Do I need to add weight plates to the TANK M4? A: No weight is required for resistance. However, adding 1–2 plates to the optional weight horn can help with tire traction on "loose" surfaces like dry grass or slick turf to prevent the wheels from skidding.
Q: How much weight can I add? A: Torque recommends a maximum of 270 lbs of added weight. Adding more will not increase resistance and may damage the tires or frame.
Q: Can I use it on my driveway? A: Yes. Unlike metal-skid sleds, the TANK M4 will not gouge concrete or asphalt and is significantly quieter.
Q: Why does it veer to the left/right? A: First, check your tire pressure (must be 30 PSI). If pressure is even, ensure you are pushing with equal force from both arms; the TANK often reveals muscular imbalances in the user.