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Nitro Gear and Axle Standard Rotation Ring and Pinion 9.25in 12-Bolt Axle

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Whether you are looking for a higher gear ratio to improve fuel economy by lowering RPM's, or wanting a lower gear ratio to match up your oversized tires, Nitro Gear & Axle has you covered.  Nitro Ring & Pinions are among the best in the industry.  By using better materials, machining, heat treating and lapping processes, Nitro can ensure a strong, quiet-running, long-lasting setup.  Every new application is put through multi-point inspections and actually installed and set up by Nitro's in-house differential experts to ensure excellent fitment and easy setup.  At Nitro we strive to meet consumer demand for new ratios and applications, and we are continually developing new products to stay ahead of the competition.

  • Precision machining & heat treating processes ensure strength and excellent fitment
  • Computer controlled fine gear lapping ensures ease of installation, excellent contact patters, and a quiet-running setup
  • Rapidly growing application range to meet new demands
  • Street or strip, track or trail - you can depend on Nitro!

Nitro Gear & Axle 3.92 Ratio Ring and Pinion

Chrysler 9-1/4" 12 Bolt
1974-1993 Dodge D100 / D150 2WD
1974-1993 Dodge W100 / W150 4WD
1994-2017 Dodge Ram 1500 4WD / 2WD
1974-1993 Dodge Ramcharger
1997-2009 Dodge Dakota
1998-2009 Dodge Durango

Nitro Gear and Axle Standard Rotation Ring and Pinion 9.25in 12-Bolt Axle is not vehicle specific.