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. The longer stem rollers allow more horizontal movement without falling out of the roller bracket and are typically used as top or bottom rollers on the garage door.
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