RPM Traxxas X-Maxx Oversized Front Axle Carriers feature increased durability and larger inner bearings. Stock bearings are a mere 20x27x4mm while the oversized bearings RPM uses are gigantic a 20x32x7mm. This delivers a load rating that is nearly 300% higher than the stock bearings while the static load rating is over 300% higher. That’s triple the strength of the stock inner bearings.