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Bottom Bracket size

steprog15steprog15 Posts: 14
edited October 2010 in MTB workshop & tech
I've just bought a GT Aggressor 2.0 14" frame and want to find out what size BB i need.
do i just measure the internal length & height??


  • Chunkers1980Chunkers1980 Posts: 8,035
    You need to measure the width of the shell - should be 68 or 73 mm IIRC.

    You then need the correct axel width for chainline and crankset.

    Check out the tech doc on their webby.

    I wouldn't bother tho - buy a Deore HTII M590 crank set and your problems will disappear (if the frame's been faced)
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