A tow strap and a tow cable serve the same general purpose of recovering a stuck vehicle, but they differ significantly in their construction, application, and safety considerations.
A tow strap, often made of nylon or polyester, is designed with some elasticity. This stretch allows for a "snatch" recovery, where the kinetic energy from a moving recovery vehicle can be transferred smoothly to the stuck vehicle, gently pulling it free. Tow straps are generally lighter and easier to handle, and their elasticity reduces the shock load on both vehicles. They are ideal for lighter vehicles and situations where a gentle pull is sufficient, but they are not suitable for lifting or heavy-duty towing as they can stretch considerably under load.
A tow cable, typically made of steel wire, is much stronger and has very little to no stretch. This makes them ideal for heavy-duty towing, winching, or situations where a steady, powerful pull is required, such as pulling a vehicle out of a deep ditch or over an obstacle. However, the lack of elasticity means that a sudden jolt can create dangerous shock loads, potentially damaging vehicles or snapping the cable. If a steel cable breaks under tension, it can recoil with extreme force, posing a severe safety risk.
In summary, the choice between a tow strap and a tow cable depends on the specific recovery scenario. Tow straps are generally safer and more effective for lighter recovery tasks due to their elastic properties, while tow cables are better suited for heavier, more demanding pulls where a rigid connection is necessary, provided extreme caution is exercised.