Klein Quantum Pro "Karma Chameleon" build

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  • So, I'm doing a new project based on a 1998 Klein Quantum Pro in the green/purple chameleon paint so it's a US built pre-trek fuesalage with the Aeros carbon fork.
    It still has the MC2 cockpit/headset combo intact on there and it's all in very good condition considering the age. No play and no coarseness.
    A minute ding in the TT and some small chainsuck rubbing on the left chainstay are the only things I can find that is wrong with the frame.

    So a few thoughts.

    I want to keep the MC2 cockpit because it looks rad and it's very light.
    I want to go mechanical because I'm not ready for any electronic bits just yet.
    I want it to have a compact chainset
    I want it to have a light clincher wheelset in carbon
    I want it at 6.5-6.8kg.

    My budget is around £1600 all in.

    What are my options? Second hand bits no doubt.

    I was thinking maybe a Rotor3D24 with Praxis Buzz 50/34 rings with Dura Ace 9000 front and rear mech + shifters, or is there better bang for the buck pairings?


  • Threaded BB or the Klein press-in?

  • Threaded, so I'm thinking Chris King Threadfit 24 just to have a set and forget bottom bracket.

  • This is nice! Always wanted to have one of them. What’s the weight of the frameset alone, any idea?

  • I need to take the seatpost out and bars off and weigh it.

    Might have some numbers tomorrow. But it's very light indeed. I'm guesstimating 900gr.

  • Don't normally go for alloy frames , but that is stunning .

  • Always wanted one of those frames, have never come across one in my size (yet). :)

    Have never liked the look of heavier chainrings like the Buzz, if you are going for the 3D24 the Rotor noQ rings are also an option?

  • You'll use 1/16 of your budget on the BB. You'll never get it done for £1600

  • I like a challenge, but you might be right on that.

  • You could get 10 normal bbs for the price of one of these? If the shell is properly faced and you only ride this bike in good weather (I'd hope so) youll struggle to wear out 10 bbs

  • My guess was far off. 2060gr with the stem and cut old housing but I’m chuffed.

  • Might actually be post Trek now when I did some googling. But that means 1 1/8 fork and threaded bb instead of 1 1/6 and klein press fit as @dammit asked about.

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Klein Quantum Pro "Karma Chameleon" build

Posted by Avatar for Thrust @Thrust