We all have pulled over to check our tie downs only to find them loose or missing. Most tie down manufacturers state on their packaging that the load should be checked every 20 to 50 miles.
Image of Competitor Strap Instructions, see the 7th bullet.
Under the movement of your load the webbing can stretch and become loose or pop off. Because your tie downs are always under tension, when you drive over a speed bump or a pothole on a road several things can contribute to your tie down becoming loose or flying off.
The springs on your equipment, trailer and vehicle all flex when you hit a bump and with a tight tie down something has to give and that often is your tie down. What happens is your webbing will flex causing slack and when your load shifts, it stretches the strap further. Or worse, the hooks pop off and your strap is left on the side of the road. (this is why you see straps in the street).
Even when you tie below your shocks or springs on your UTV or ATV you are still dealing with the air pressure of your tires which are typically under 5lbs of pressure and act like a giant marshmallow, compressing and flexing over every bump. This can cause the strap to start to stretch or pop off.
ShockStraps are different. Our tie downs use high quality polyester webbing and have a built in ShockStrap in the tie down. We do not need to tell you to pull over every 20 to 50 miles or at any time to check your load. All we ask is that you stretch the ShockStrap to over ½ inch or more to engage them. Your load is now secure for the duration of your trip.