3RACING 3RB-6701-ZZ/2 Race Grade Double Shield Bearings 12x18x4mm  [3RB-6701-ZZ/2]

Engineering Notes on Shielded Bearing Design

For racers focused on efficiency, bearing choice affects drivetrain losses and control feel. The 3RACING Double Metal Shield Bearing 12 x 18 x 4 mm balances low friction with protective shielding to maintain consistent spin under load. Tight manufacturing tolerances support repeatable performance during setup changes.

Shield Construction and Performance Tradeoffs

Metal shields reduce ingress of particles while preserving low rolling resistance compared with softer seals. That makes these bearings suitable for high RPM sections where heat and drag must be minimised while still offering protection from typical track debris.

Recommended Install and Use Cases

Install these bearings in wheel hubs, small gearbox outputs, and pinion supports where compact size and low deflection are important. When tuning, couple them with light lubricant and check axial play to verify minimal runout for optimal lap consistency.