Bearing Spacer 31 Spline For Midget Birdcages

The Bearing Spacer 31 Spline For Midget Birdcages from MPD Racing is a precision-engineered component designed for racers building or maintaining high-performance midget racing differentials. This bearing spacer insert serves as a critical load-bearing element within birdcage differential assemblies, ensuring proper axle alignment and load distribution under extreme racing conditions. Whether you're upgrading an existing differential or assembling a new one from scratch, this spacer maintains the exact tolerances required for smooth, reliable operation on dirt and asphalt tracks.

Manufactured from aluminum and finished in black anodize, the Bearing Spacer 31 Spline delivers lightweight durability while resisting corrosion and wear. The 31-spline design matches OEM midget birdcage specifications, with a 1.875-inch bore and 2.145-inch outer diameter that fits standard bearing pockets without modification. Black anodized finish provides both aesthetic appeal and protection against oxidation, while the aluminum construction keeps rotating mass to a minimum—critical for reducing parasitic drag in high-RPM racing applications. The compact profile (0.17 lbs) ensures it integrates seamlessly into existing differential assemblies without adding unnecessary weight.

Midget racers and differential shops rely on MPD Racing bearing spacers to maintain precise concentricity and prevent axle walk during acceleration and cornering. This single spacer is sold individually, allowing you to purchase exactly what your build requires—whether you're replacing a worn component or stocking inventory for multiple cars. Installation is straightforward for anyone familiar with differential assembly; the spacer sits between the bearing race and birdcage pocket, maintaining load paths and preventing lateral movement. Compatible with any midget birdcage differential using 31-spline internals, this spacer is essential for maintaining performance and longevity in competitive racing.