M&W Aluminum Rear Sprocket 40T 6.43in BC 520 Chain — Micro Sprint Drivetrain

SKU: BJFJ_SP520-643-40T
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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 M&W Aluminum

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

High-Performance Micro Sprint Rear Sprocket

Maximize your drivetrain efficiency with the M&W Aluminum Rear Sprocket. Engineered specifically for Micro Sprint racing, this 40-tooth sprocket is crafted from lightweight, high-strength aluminum to reduce rotating mass while maintaining exceptional durability. Featuring a 6.43-inch bolt circle, it is designed to integrate perfectly with standard racing axle setups using a 520 chain.

Technical Specifications

  • Tooth Count: 40T
  • Bolt Circle: 6.43 inches
  • Chain Size: 520 Chain
  • Material: Lightweight Aluminum
  • Application: Micro Sprint Racing

The natural finish aluminum construction provides an ideal balance of weight savings and strength, allowing for quicker acceleration and improved throttle response. Precision machining ensures that the teeth engage smoothly with your 520 chain, minimizing wear and maximizing power transfer to the track. Whether you are competing on dirt or asphalt, this sprocket is built to handle the demands of high-torque racing environments. Upgrade your drivetrain with a component that offers both reliability and performance. For racers who demand the best in drivetrain technology, GGCRACING provides the parts you need to stay ahead of the competition.

Product Details

Product Description
Part Numbers
Sizing & Fit

About M&W Aluminum

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

High-Performance Micro Sprint Rear Sprocket

Maximize your drivetrain efficiency with the M&W Aluminum Rear Sprocket. Engineered specifically for Micro Sprint racing, this 40-tooth sprocket is crafted from lightweight, high-strength aluminum to reduce rotating mass while maintaining exceptional durability. Featuring a 6.43-inch bolt circle, it is designed to integrate perfectly with standard racing axle setups using a 520 chain.

Technical Specifications

  • Tooth Count: 40T
  • Bolt Circle: 6.43 inches
  • Chain Size: 520 Chain
  • Material: Lightweight Aluminum
  • Application: Micro Sprint Racing

The natural finish aluminum construction provides an ideal balance of weight savings and strength, allowing for quicker acceleration and improved throttle response. Precision machining ensures that the teeth engage smoothly with your 520 chain, minimizing wear and maximizing power transfer to the track. Whether you are competing on dirt or asphalt, this sprocket is built to handle the demands of high-torque racing environments. Upgrade your drivetrain with a component that offers both reliability and performance. For racers who demand the best in drivetrain technology, GGCRACING provides the parts you need to stay ahead of the competition.

Product Details

Product Description

About M&W Aluminum

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

High-Performance Micro Sprint Rear Sprocket

Maximize your drivetrain efficiency with the M&W Aluminum Rear Sprocket. Engineered specifically for Micro Sprint racing, this 40-tooth sprocket is crafted from lightweight, high-strength aluminum to reduce rotating mass while maintaining exceptional durability. Featuring a 6.43-inch bolt circle, it is designed to integrate perfectly with standard racing axle setups using a 520 chain.

Technical Specifications

  • Tooth Count: 40T
  • Bolt Circle: 6.43 inches
  • Chain Size: 520 Chain
  • Material: Lightweight Aluminum
  • Application: Micro Sprint Racing

The natural finish aluminum construction provides an ideal balance of weight savings and strength, allowing for quicker acceleration and improved throttle response. Precision machining ensures that the teeth engage smoothly with your 520 chain, minimizing wear and maximizing power transfer to the track. Whether you are competing on dirt or asphalt, this sprocket is built to handle the demands of high-torque racing environments. Upgrade your drivetrain with a component that offers both reliability and performance. For racers who demand the best in drivetrain technology, GGCRACING provides the parts you need to stay ahead of the competition.

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