Porta-Glide Dolly Sleds are for use with heavier professional dollies. With each of the 16 wheels having different diameters, the problem of “flat spots” creating bumps is solved.
Each of the 16 wheels has a different diameter. They are positioned on the wheel block so that all wheels are touching simultaneously, and, like the other systems, these wheels will flatten slightly. However, as they turn, instead of 16 flat spots hitting in unison, each of our wheels returns to its flat spot at a different time, making the spot undetectable.
There is also a 4- hole pattern that is the same as that used on the speed rail plates. These plates accept two pieces of speed rail. Putting our wheel assemblies onto these plates and adding a couple pieces of speed rail is an easy way to make a wider sled for those times when one wants to mount the dolly perpendicular to the track.