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Isn't it just the MAX OR tubeset? Quite a few frame builders used that on their MTBs (Pinarello Maxim, Kona explosif etc...) I didn't know it was that much heavier.
@Scilly.Suffolk I kinda agree. I'm eyeing up a bargain on lbc atm but I'm not quite sure whether it's proper steel max or the max shaped altec. I asked the seller if he could test it with a magnet but he didn't reply yet.
There was also a 5 ton weighing Max shaped mtb-tubing (used by Colnago for their Maxim bikes). :-)