The 3Racing Double Metal Shield Flanged Bearing 4x7x2.5 mm is specified for builders wanting a sealed, low drag bearing option in tight tolerances. Delivered as a two piece set, these bearings are intended to provide consistent rolling resistance and predictable behaviour during tuning.
Double metal shields limit particulate ingress while preserving minimal internal clearance, which assists in maintaining bearing geometry under load. The flange provides a reliable axial location that simplifies alignment in hub and gearbox assemblies.
Install the bearings using a driver against the outer race to avoid inner race damage and ensure concentric fit. Periodic inspection for endplay and smoothness, plus light lubricant application, will help sustain performance in demanding racing environments.