The main problem with the plastic hub is that the bearing seat is not concentric with the outside, so it isn't balanced. I made my own alloy hub a while back (to which, incidentally the Mardave upgrade hub is essentially identical). Diff action was better and the car was smoother. Because the ring seats are dead flat, the pressure on the balls as the hub rotates is constant so the diff feels more consistent. I would like to know if the Mardave official alloy hub gives the same results but if they have machined it properly it certainly should. Also has the multiple slots so you are not limited to 6 spoke wheels.
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