Winters 8500 Series Quick Change Gears Set 21A — 10 Spline

SKU: BJKD_8521A
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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 Winters

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

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Winters 8500 Series Quick Change Gears - Set 21A

Precision Gear Ratios for Competitive Racing

Maximize your vehicle's performance with the Winters 8500 Series Quick Change Gears, Set 21A. Crafted from high-grade steel, these 10-spline gears are built for durability and consistent performance under demanding racing conditions. The polished finish reduces friction, ensuring efficient power transfer and extending the lifespan of your drivetrain components. This set allows for quick and easy ratio changes, providing the flexibility needed to adapt to various track conditions.

Features and Specifications:

  • Series: 8500
  • Set Designation: 21A
  • Spline Count: 10 Spline
  • Material: Durable steel construction
  • Finish: Polished for reduced friction and enhanced wear resistance
  • Included Ratios: 4.12 (6.32 / 2.69) and 4.86 (7.45 / 3.17)

The Winters Quick Change Gear Set is an essential component for racers seeking to fine-tune their vehicle's acceleration and top-end speed. Its robust design ensures reliability lap after lap, while the ability to quickly swap ratios provides a significant competitive advantage. Whether fine-tuning for a specific track or preparing for a season of racing, these gears deliver the performance and adjustability you need. Equip your drivetrain with quality from GGCRACING.

Product Details

Product Description
Part Numbers
Sizing & Fit

About Winters

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

Watch in action

Winters 8500 Series Quick Change Gears - Set 21A

Precision Gear Ratios for Competitive Racing

Maximize your vehicle's performance with the Winters 8500 Series Quick Change Gears, Set 21A. Crafted from high-grade steel, these 10-spline gears are built for durability and consistent performance under demanding racing conditions. The polished finish reduces friction, ensuring efficient power transfer and extending the lifespan of your drivetrain components. This set allows for quick and easy ratio changes, providing the flexibility needed to adapt to various track conditions.

Features and Specifications:

  • Series: 8500
  • Set Designation: 21A
  • Spline Count: 10 Spline
  • Material: Durable steel construction
  • Finish: Polished for reduced friction and enhanced wear resistance
  • Included Ratios: 4.12 (6.32 / 2.69) and 4.86 (7.45 / 3.17)

The Winters Quick Change Gear Set is an essential component for racers seeking to fine-tune their vehicle's acceleration and top-end speed. Its robust design ensures reliability lap after lap, while the ability to quickly swap ratios provides a significant competitive advantage. Whether fine-tuning for a specific track or preparing for a season of racing, these gears deliver the performance and adjustability you need. Equip your drivetrain with quality from GGCRACING.

Product Details

Product Description

About Winters

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

Watch in action

Winters 8500 Series Quick Change Gears - Set 21A

Precision Gear Ratios for Competitive Racing

Maximize your vehicle's performance with the Winters 8500 Series Quick Change Gears, Set 21A. Crafted from high-grade steel, these 10-spline gears are built for durability and consistent performance under demanding racing conditions. The polished finish reduces friction, ensuring efficient power transfer and extending the lifespan of your drivetrain components. This set allows for quick and easy ratio changes, providing the flexibility needed to adapt to various track conditions.

Features and Specifications:

  • Series: 8500
  • Set Designation: 21A
  • Spline Count: 10 Spline
  • Material: Durable steel construction
  • Finish: Polished for reduced friction and enhanced wear resistance
  • Included Ratios: 4.12 (6.32 / 2.69) and 4.86 (7.45 / 3.17)

The Winters Quick Change Gear Set is an essential component for racers seeking to fine-tune their vehicle's acceleration and top-end speed. Its robust design ensures reliability lap after lap, while the ability to quickly swap ratios provides a significant competitive advantage. Whether fine-tuning for a specific track or preparing for a season of racing, these gears deliver the performance and adjustability you need. Equip your drivetrain with quality from GGCRACING.

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