J Top Mount Bifold Measurements | 2 Door Kits | Quick Ship
| J Top Mount Roller Measurements | |
| Height Above Door | 5-1/2 inches |
| Roller Thickness | 2 inches |
| Wheel Diameter | 2-3/4 inches |
| Roller Width | 1-9/16 inches |
| Roller Head Height | 5-3/8 inches |
| Roller Mount Height | 1/8 inches |
| Minimum Clearance between Top of Door and Ceiling | 7 inches |
| Track Width | 1-1/2 inches |
| Track Thickness | 1/4 inches |
| Total Weight Capacity | 180 lbs |
| Additional Track Length Needed For Fully Clear Opening | 6 inches |
| Minimum Door Thickness | 1in |
| Maximum Door Thickness | 2in |
