Store › Micro Sprint | Birdcage Bearing Insert – 1.75″ Splined Image 1 of 1 Micro Sprint | Birdcage Bearing Insert – 1.75″ Splined $20.45 Splined Aluminum insert for Birdcage Bearings for 1.75″ Splined Axle Add To Cart Added! Splined Aluminum insert for Birdcage Bearings for 1.75″ Splined Axle