BB & crankset question

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  • time for some recursive forum navigation...

    [QUOTE=highboy_coupe;1496578]
    Whats the deal with BMX BB + cranks, my tiny mind says if it's a Euro BB then the bearings/cups and crank axle will fit into a 68mm MTB BB shell, even allowing spacing of the chainring? So it just a matter of staying away from Mid and Standard BBs, Or is there some other magic going on?
    I have a 107mm square taper in at the minute, and chainline issues mean it's going to have to stay that length, any ideas on spacing a coaster hub sprocket out?

    [QUOTE=propeller;692198]there may be a thread about this that i cant find I HAVE SEARCHED !
    if there is please link me to it.
    if not, what do you guys think about having bmx crank arms and stuff on fixed/single speed bike? or is it just fashionable to have it?

    [QUOTE=mdizzle;1124764]I used the search and found some things, but i need some advice from the ex/current BMXers out there.
    I live in Brasil, and the availability of any kind of fixed gear/track frame is not that good, so to counter this i have collaborated with a BMX frame builder to produce a prototype frame.We used a track frame for the template, but have made it from 4130, it weighs in at 2kgs.....the only problem is that it has a mid sized bb.
    This means i can only use BMX cranks, apart from the chainring pinch bolt unscrewing and the obvious weight dis-advantages, what other problems will i encounter using a BMX crankset?
    As i have said this is a prototype frame, and anu ones that go into production will have a standard threaded bb, we just built with what we had available....
    Thanks for any help......

    [QUOTE=vinylvillain;1124774]http://www.londonfgss.com/thread21907.html

    I am sure i heard Profile are making a Fixed specific crank now?
    [/QUOTE]

    [/QUOTE]

    [/QUOTE]

    There's loads of info in other threads about this, but yeh your basically right. BMX cranks are completely adjustable (profile 19mm / primo 22mm). You can change the shell width (cut the tube spacer) and chainline to suit anything.
    [/quote]

  • depends when the raleigh was built though. oldddd ones have 26tpi bb threads which means they'll need retapping.

  • Got a pic of the frame, or have any info on it?

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BB & crankset question

Posted by Avatar for samsoymilk @samsoymilk

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