EXCEL from Richmond Ring & Pinion Gear Set 3.73 Ratio — Fits GM 8.5/8.6 inch 10-Bolt

SKU: GGVJ_GM85373
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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

About EXCEL from Richmond

EXCEL from Richmond engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full EXCEL from Richmond lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Optimize Your Acceleration

Unlock your vehicle's true potential with the EXCEL from Richmond 3.73 ratio ring and pinion gear set. Specifically designed for the GM 8.5/8.6-inch 10-bolt rear end, this gear set is the perfect balance for drivers looking to improve off-the-line acceleration while maintaining streetability. These gears are precision-cut from high-grade steel to ensure maximum strength and longevity under load.

Key Features and Fitment

  • Ratio: 3.73
  • Pinion Spline: 30
  • Compatible with 3 Series Carriers
  • Fits GM 8.5" and 8.6" 10-Bolt Differentials
  • Precision heat-treated for wear resistance

The 3.73 gear ratio is widely considered the "sweet spot" for many muscle cars and trucks, providing a noticeable boost in torque delivery. Whether you are upgrading from factory gears or replacing worn-out components, this set provides the quiet, smooth operation you expect from Richmond-engineered products. The 30-spline pinion ensures compatibility with standard axle setups, making this an ideal choice for a variety of GM applications. Each kit is inspected to guarantee that tooth contact patterns are optimized for long-term reliability. Trust in the quality of EXCEL components to keep your drivetrain running strong. Find the best performance parts for your build at GGCRACING.

Product Details

Product Description
Part Numbers
Sizing & Fit

About EXCEL from Richmond

EXCEL from Richmond engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full EXCEL from Richmond lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Optimize Your Acceleration

Unlock your vehicle's true potential with the EXCEL from Richmond 3.73 ratio ring and pinion gear set. Specifically designed for the GM 8.5/8.6-inch 10-bolt rear end, this gear set is the perfect balance for drivers looking to improve off-the-line acceleration while maintaining streetability. These gears are precision-cut from high-grade steel to ensure maximum strength and longevity under load.

Key Features and Fitment

  • Ratio: 3.73
  • Pinion Spline: 30
  • Compatible with 3 Series Carriers
  • Fits GM 8.5" and 8.6" 10-Bolt Differentials
  • Precision heat-treated for wear resistance

The 3.73 gear ratio is widely considered the "sweet spot" for many muscle cars and trucks, providing a noticeable boost in torque delivery. Whether you are upgrading from factory gears or replacing worn-out components, this set provides the quiet, smooth operation you expect from Richmond-engineered products. The 30-spline pinion ensures compatibility with standard axle setups, making this an ideal choice for a variety of GM applications. Each kit is inspected to guarantee that tooth contact patterns are optimized for long-term reliability. Trust in the quality of EXCEL components to keep your drivetrain running strong. Find the best performance parts for your build at GGCRACING.

Product Details

Product Description

About EXCEL from Richmond

EXCEL from Richmond engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full EXCEL from Richmond lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Optimize Your Acceleration

Unlock your vehicle's true potential with the EXCEL from Richmond 3.73 ratio ring and pinion gear set. Specifically designed for the GM 8.5/8.6-inch 10-bolt rear end, this gear set is the perfect balance for drivers looking to improve off-the-line acceleration while maintaining streetability. These gears are precision-cut from high-grade steel to ensure maximum strength and longevity under load.

Key Features and Fitment

  • Ratio: 3.73
  • Pinion Spline: 30
  • Compatible with 3 Series Carriers
  • Fits GM 8.5" and 8.6" 10-Bolt Differentials
  • Precision heat-treated for wear resistance

The 3.73 gear ratio is widely considered the "sweet spot" for many muscle cars and trucks, providing a noticeable boost in torque delivery. Whether you are upgrading from factory gears or replacing worn-out components, this set provides the quiet, smooth operation you expect from Richmond-engineered products. The 30-spline pinion ensures compatibility with standard axle setups, making this an ideal choice for a variety of GM applications. Each kit is inspected to guarantee that tooth contact patterns are optimized for long-term reliability. Trust in the quality of EXCEL components to keep your drivetrain running strong. Find the best performance parts for your build at GGCRACING.

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