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  1. #1
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    What size bolts for a Klein Navigator?

    So I've got my Klein built now and I want to add a rack. I order & receive a nice Tubus, go to put it on, and SURPRISE - the bolts don't fit!

    There are tapped ears at the rear dropouts for a rack and a fender. The holes are threaded, but no bolts came with the bike. 5 mm bolts are too large & won't go into the holes. 4 mm bolts are too small and just rattle around in there. SAE bolts seem to be the right size, but the thread is wrong - I get the bolts in about half a turn and the threads bind.

    Same situation with the front fork - the fork is tapped (inside and outside the fork blade). The holes are too large for 5 mm bolts, too small for 6 mm, and threaded wrong for SAE.

    WHAT KIND OF GOOFY BOLTS DOES THIS KLEIN NEED?

    I doubt that they'd have used English threads, so I suspect that it is some alternate SAE threading. The local bike shop didn't have anything to fit, nor did the local hardware store. I could tap the holes for the next size up in metric, but I worry about creating stress cracking in the aluminum. I'd really like to have bolts that fit the original Klein threads.

    Thanks!

  2. #2
    Svr
    Svr is offline
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    That's quite an odd problem. I'd think they would be the common M5x.8 size. Is there a thick coat of paint in the threads? Have you tried to gingerly run that size tap through yet?

  3. #3
    Senior Curmudgeon
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    Quote Originally Posted by Svr
    That's quite an odd problem. I'd think they would be the common M5x.8 size. Is there a thick coat of paint in the threads? Have you tried to gingerly run that size tap through yet?
    5mm and 6mm taps are DEFINITELY too large for the holes - it isn't just a paint problem.

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