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  1. #1
    Kid A TurbineBlade's Avatar
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    Bottom brackets - road on mtn frame?

    If you have 2 bikes, 1 road and 1 mountain (68mm and 73mm) and the road takes a 110 spindle length, do you use a 68mm X 115 to transfer the cranks to a mountain bike or a 73mm X 110 to do it?

    Stupid question, just wondering...

    thanks,
    Cyclist, angler and aquarist

  2. #2
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    From 110 to 115 u have only 2.5 mm per side of difference. What I would do is to move the road one to the MTB one and put a 2mm spacer in the drive side to move the spindle a little bit just because of clearance, maybe is not even needed. I put a 102 campagnolo in a MTB a couple of years ago with a spacer just for clearance.

    Good luck

  3. #3
    Bianchi Goddess Bianchigirll's Avatar
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    Quote Originally Posted by ultraman6970 View Post
    From 110 to 115 u have only 2.5 mm per side of difference. What I would do is to move the road one to the MTB one and put a 2mm spacer in the drive side to move the spindle a little bit just because of clearance, maybe is not even needed. I put a 102 campagnolo in a MTB a couple of years ago with a spacer just for clearance.

    Good luck
    UM not really. this may work but is not ideal. the 68 or 73 measurement is of course the width of the shell, hence the width of the bearing races on the spindle. just useinf spacers moves the whole thing over to the right and puts the cranks off center.

    you really need a 73x110 spindle. better yet just get the correct cartdige BB
    Bianchis '87 Sport SX, '90 Proto (2), '91 Boarala 'cross, '93 Project 3, '88 Trofeo, '86 Volpe, '89 Axis, '79 Mixte SOLD, '99 Mega Pro XL Ti, '97 Ti Megatube, , '90 something Vento 603,

    Others but still loved,; '80 RIGI, '80 Batavus Professional, '87 Cornelo, '86 Bertoni (sold), '09 Motobecane SS, '98 Hetchins M.O., '09 K2 Mainframe, '89 Trek 2000, '?? Jane Doe (still on the drawing board), '90ish Haro Escape

  4. #4
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    Well he was asking if it could work, yes it could. But w/o testing who knows.

  5. #5
    Senior Member bellweatherman's Avatar
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    Chainline would be compromised and shifting, especially front derailed shifting would be compromised.
    Livestrong. The personal fundmaker of Lance Armstrong. The company who are in business to not donate to cancer research, but only to inform people that cancer is bad.

    Armstrong. The man without integrity, no care for the sport, and no problem with testing positive for EPO and making donations to cover it up.

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