RPM Oversized Rear Axle Carriers for the ECX Boost, Circuit 2WD, Ruckus 2WD and Torment 2WD utilize 5x11mm bearings compared to the 5x10mm stock units. That little change nearly doubles all load and fatigue ratings over the stock bearing size. Each set of RPM axle carriers is molded from an ultra-durable, world-renowned blend of engineering-grade nylons to keep you rolling when everything else would have fallen apart.
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