The yeah racing rear hubs fit looser on the hinge pins. That said, they're setup with a screw hole, so if you're using 3mm rod instead of the tamiya screw pins, you can pin the rod in the hub instead.. that'll help that. The position of the ballstud means the upper control arm runs out of pivot room, causing a rapid rise in spring rate. (Read: causes the car to spin out) And the bearing fit is sloppy versus the tamiya plastic parts.

The car tracked better, and had fewer handling quirks with the stock rear hubs installed.