Why SureLock Wide-Boy Tie Downs? The problem with standard tie downs is their open-ended hook design. When a bike bounces in transit the suspension moves up and down, causing tie downs to lose tension which means ‘open’ hooks can all too easily become unattached. Very bad news follows - your expensive pride & joy falls off and hits the ground while you’re moving along at speed, causing thousands of $$$$ damage. Ouch!