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. Short stem rollers, with a 4" stem, are the standard rollers used on garage doors. The 10-ball bearing wheels make the rollers move smoothly through the tracks and have an average life expectancy of 15,000 cycles.
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