BAK Industries Revolver X4s Tonneau Cover - Black - 5 ft 10 in Bed - GM Fullsize Truck 2019-24 26995-16 650" inside diameter are used

650" inside diameter are used to equalize the installed height of valve springs

Ford Fullsize SUV / Truck 1971-98

See the chart below to compare TCI Input Shaft materials compared to stock and other aftermarket brands

Yet it maintains its ease-of-use that doesn't require a laptop or tuning experience

You will get the benefits of running a heavy spring to get you into and through the center of the corner but also have the benefit of a lighter spring for more traction coming off the corner

BAK Industries Revolver X4s Tonneau Cover - Black - 5 ft 10 in Bed - GM Fullsize Truck 2019-24 26995-16 650" inside diameter are usedThe new BAK Revolver X4s is the third generation of America's #1 selling premium hard rolling cover, now with exciting new features. The Revolver X4s is a bed cover engineered for real world durability. With NEW matte black heavy duty aluminum slats wrapped in industrial grade vinyl and a matte black finish, top to bottom, the X4s delivers a modern, stylish appearance. With the cover closed, the patented rotational locking system secures the X4s for