2" Long Stem Nylon Garage Door Roller
The standard garage door
roller has a wheel that is 1-3/4 inches in diameter. They are called 2
inch rollers because they are used in 2 inch tracks which is standard on
residential and most commercial garage doors. The nylon wheels with
11-ball bearings make the rollers quieter and roll more smoothly through
the tracks and have an average life expectancy of 20,000 cycles.