Quick Overview Chain Link Rolling Gate Track Roller Track Wheel Rolling/Sliding Gate Rear Track Roller for 2" (1-7/8") Gate Frame & 1-5/8" Track Pipe. The Track Wheels are a Solid One Piece design and are about 5-1/4" Heavy Duty Cast style. This style is sturdier than the typical split/two-piece style! They are also the safety track wheel type with the retainer to help the gate to stay on track. Track Wheel fits a 1-5/8" Track Pipe and a 1-7/8" Chain Link Fence Gate Frame. Use Schedule 20 1-5/8" outside diameter pipe (we recommend schedule 40) for the roller to roll on. *Commercial/Industrial Strength Rolling/Sliding Gate Rollers. Each rolling chain link gate will require 2 of these Track Wheels, 6 track brackets, and a wheel carrier for the outer end of the gate. * We highly recommend you do not use tubing.