You say that “RollBak Tonneau Cover” has massive “Constant Force” springs which are guaranteed for over 10,000 retractions.” What are “Constant Force” springs?
Constant force springs are very similarly at work in standard locking metal tape measures. This concept is used in the cover as these springs are constantly trying to retract the cover fully back into the canister. The springs are located at the core of the canister and when you pull the cover out (toward the tailgate) the spring is under pressure to retract the cover back again. Thes springs are guaranteed for over 10,000 retractions! This means that if you open the cover every single day, the spring will be working perfectly for more than 27 Years!
