Reversable rear hubs (Hex and Afam)

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I am looking into getting a spare set of wheels for my KX 500 and have spotted the Hex hubs made by RAD Mfg in Parts Unlimited advert and also the Afam hubs sold here http://www.biketorqueracing.co.uk/afamhubs.asp Now they both have removable sproket and disc cariers so you can take the wheel out and spin it around so your knobbles have sharp edges facing the right way without having to take the tyre off. The Afam hubs seem pretty cheap but I have not heard of them before so does anyone know if they are any good?Also is there anywhere that has pictures of them? I can't even find the Hex hubs on the Parts Unlimited website. Cheers

 

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Doh! now I have gone back on the Afam website I have noticed they are in England, as I am. So I am getting them to post me some info. The price no longer looks quite as good now that I know that it is in pounds and not dollars:o