Over sixty years of gear manufacturing know-how went into designing Quarter Master® Ultra-Duty™ Quick Change Gears. Starting with the highest quality E9310 aircraft steel, we precision hob them to AGMA Class B Tolerances to produce a true involute tooth form for a high contact ratio. After a proprietary heat treatment process, all gears are hand roll tested and inspected. These quick change gears are specifically designed to run smoother and last longer than any other on the market. They are available with 64 gear ratios in 10-Spline for Sprint and Late Models, and 42 gear ratios in 6-Spline for Midgets.
Ultra Duty Quick Change
Over sixty years of gear manufacturing know-how went into designing Quarter Master® Ultra-Duty™ Quick Change Gears. Starting with the highest quality E9310 aircraft steel, we precision hob them to AGMA Class B Tolerances to produce a true involute tooth form for a high contact ratio. After a proprietary heat treatment process, all gears are hand roll tested and inspected. These quick change gears are specifically designed to run smoother and last longer than any other on the market. They are available with 64 gear ratios in 10-Spline for Sprint and Late Models, and 42 gear ratios in 6-Spline for Midgets.
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Ultra Duty Gears, 27/27 teeth, spur ratio: 1
$142.11Ultra Duty Gears, 27/27 teeth, spur ratio: 1 Learn More -
Ultra Duty Gears, 35/36 teeth, spur ratio: 1.029
$142.11Ultra Duty Gears, 35/36 teeth, spur ratio: 1.029 Learn More -
Ultra Duty Gears, 27/28 teeth, spur ratio: 1.037
$142.11Ultra Duty Gears, 27/28 teeth, spur ratio: 1.037 Learn More -
Ultra Duty Gears, 22/23 teeth, spur ratio: 1.045
$142.11Ultra Duty Gears, 22/23 teeth, spur ratio: 1.045 Learn More -
Ultra Duty Gears, 19/20 teeth, spur ratio: 1.053
$142.11Ultra Duty Gears, 19/20 teeth, spur ratio: 1.053 Learn More -
Ultra Duty Gears, 27/29 teeth, spur ratio: 1.074
$142.11Ultra Duty Gears, 27/29 teeth, spur ratio: 1.074 Learn More -
Ultra Duty Gears, 22/24 teeth, spur ratio: 1.091
$142.11Ultra Duty Gears, 22/24 teeth, spur ratio: 1.091 Learn More -
Ultra Duty Gears, 21/23 teeth, spur ratio: 1.095
$142.11Ultra Duty Gears, 21/23 teeth, spur ratio: 1.095 Learn More -
Ultra Duty Gears, 19/21 teeth, spur ratio: 1.105
$142.11Ultra Duty Gears, 19/21 teeth, spur ratio: 1.105 Learn More -
Ultra Duty Gears, 26/29 teeth, spur ratio: 1.115
$142.11Ultra Duty Gears, 26/29 teeth, spur ratio: 1.115 Learn More
