my local hobbyshop in the u.s. has all the xx4 parts i could ever want so i would say that every part is available.
on a loose or bumpy track there is nothing better than a nicely set up xx4!
i had a xxx4 and absolutely hated it. i had a b44 and it was good but i just prefer the xx4.
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rc10b4, rc10t4, 5 old school rc10's, blackfoot, lunchbox and still my favorite.....the XX4
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