Bike Forums - View Single Post - Bottom bracket problem

05-02-26 | 08:12 PM

#4

maddog34

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Joined: Jul 2015

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From: NW Oregon

Bikes: 1982 Trek 930R Custom, '91 Diamondback Ascent w/ XT, XTR updates, Fuji Team Pro CF road flyer, Specialized Sirrus Gravel Convert, '09 Comencal Meta 5.5 XC, '02 Marin MBX500, '84 Gitane Criterium bike

Quote:

Originally Posted by daveking56

Hi
My grandson just snapped his one piece setup and i had
a bottom bracket from my mountain bike.
Got the adapters to fit the bottom bracket and used a
MTB crank set.
Now the chain ring sits too far out.
I tried spacer rings but not working.
What have i done wrong.
The bike is a Big Daddy..

Thank you.

Dave king

you'll need to use the Correct Length Bottom Bracket for that "used crankset"... cranksets tend to vary from maker to maker, and by era too.

what length BB did you install?is the spindle square on both ends, or does it use a spline?
Spindle Length and Shell width play into the equation... what is the outer width of the adapter, as mounted in the bike?

Last edited by maddog34; 05-02-26 at 08:21 PM.

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