Bottom bracket weirdness

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  • Sorry for the newb'ness of my post, but in my 10 years of somewhat serious cycling, I've never used a BB that wasn't hammered into the frame :D

    Just put my fuji track together and noticed the bottom bracket looks odd - seems to me like there might be something missing? Here's a couple pics, I'd appreciate if any of you could let me know what you think! :)


    Thoughts? cheeers!

  • Looks ok to me.

    There's no lockring on cartridge BBs.

  • Is it done up tight? The one above is mine and you can see it's winding out on the non-drive side.

  • I've got the same bike and it looks the same.

  • cheers guys :D I've got a fair bit to learn about this.. One more silly question - is there an easy way to find out what kind of thread my frame has? English vs. Italian vs.. anything else?

  • your frame is new and bought in this country it would obviously be english threading.
    italian has quite a larger diameter (36) compared to english (34.8) both are 24tpi.
    you can take the b.b. out and measure it.

  • many thanks once again ;)

  • Fujis are English threaded. Very few manufacturers do anything else these days.

  • http://www.sheldonbrown.com/gloss_bo-z.h­tml#bottom_bracket

    Scrole down to the table. It has all of the shell sizes thread tpi and everything for b.b. Only stuff it is missing is stuff on BMX mid and spanish b.b.

  • thanks guys ;) that table is pretty useful, cheers!

    So far I've figured my BB is actually complete (hehe) and has an english thread with a JIS tapered axle. I'm thinking of using my campy triomphe chainset which is ISO. That would pretty much screw up my chainline, and I'd have no idea how to compensate for that. I think I'd rather buy a bottom bracket.. Argh this is making my head hurt.

    The cranks have a double chainring, which I'm planning on turning single using shorter bolts. Apparently, using a bb for a double chainset, it places the inner ring at 41mm and the outer at 46. So if I were to use the inner ring, it should work pretty good, right? Or do I definately want a track bottom bracket? If so, any cheap ISO tapered track bb's around?

  • unxetas The cranks have a double chainring, which I'm planning on turning single using shorter bolts. Apparently, using a bb for a double chainset, it places the inner ring at 41mm and the outer at 46. So if I were to use the inner ring, it should work pretty good, right? Or do I definately want a track bottom bracket? If so, any cheap ISO tapered track bb's around?

    Campag make cheap (ten sheets) ISO Cart BBs. Either Mirage or Veloce. Spindle is 111mm on both.

    Do you know the standard spindle length for the cranks you wish to use?

    Do you really need the hassle?

    You've got a bike that works!

    Ride and enjoy.

  • oh I do ride and certainly enjoy :) fiddling around with this stuff doesn't stop me from riding, at all! But I've always enjoyed working on my bikes and knowing what works and what doesn't.. At the moment, my brain itches just because I still don't know that much about all this big wheeled stuff. Changing the cranks around will most likely teach me quite a lot about it! Mechanically speaking, bb's and cranks are just about the only thing different from a bmx (apart from gears, but thankfully I don't have to deal with those).

    Really, it's just the campag looks so purty and the stock ones on my bike look so.. cheap.

  • The stock ones do indeed, look cheap.

    They are cheap. Had them on my last bike. Nowt wrong with them until it's time to change the chainring...

    Cannondale's £800 singlepeeder has the very same ones, so you're in good company.

    IIRC those cranks use a 110mm JIS, if that helps at all. You might even get away with it on the inner ring.

    I'm just bitter cos I'm bikeless at the mo...

  • that sucks.. I might have a bmx up for sale soon ;) (my girlfriend's, she needs a commuter and we can't really have 4 bikes on our bedroom anymore..)

  • are cannondales rip-offs? a guy in evans tried to sell me that singlespeeder over a bianchi pista. i couldnt really afford the pista nevermind that, plus i only need one brake...

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Bottom bracket weirdness

Posted by Avatar for unxetas @unxetas

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