Winters Quick Change Gear Set 8500 Series 10 Spline 4.12 7.21 2.35 4.86 8.50 2.78 WIN8550

When track conditions or course layouts demand mid-event adjustments, swapping gear ratios shouldn't cost you time or reliability. The Winters Quick Change Gear Set 8500 Series eliminates guesswork by delivering multiple proven ratios in a single, durable package—allowing you to dial in the exact final drive for any racing scenario without breaking down your rear end.

Built from high-quality steel and engineered for the Winters 8500 Series platform, this quick-change system lets you transition between configurations in minutes rather than hours, keeping your focus on what matters: winning. Whether you're optimizing for drag launch, road course acceleration, or oval track top speed, these precisely-cut gears ensure consistent power delivery and durability under load.

• Series: 8500
• Spline count: 10
• Includes 4.12 ratio
• Includes 4.86 ratio
• 4.12 configuration: 7.21 / 2.35
• 4.86 configuration: 8.50 / 2.78
• Material: High-quality steel
• Installation: Bolt-on
• Sold: Each
• MPN: 8550