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Technical & Reference Section => Tech and Restoration => Topic started by: eloopnai on April 03, 2008, 05:35 PM

Title: crank trouble still
Post by: eloopnai on April 03, 2008, 05:35 PM

posted on here ages ago about the crank not beeing even in the bottom bracket on my supergoose 3

ive now got 2 other cranks and the same happens

(http://www.radbmx.co.uk/archive/albums/cc161/eloopnai/SS103141.jpg)
(http://www.radbmx.co.uk/archive/albums/cc161/eloopnai/SS103142.jpg)
(http://www.radbmx.co.uk/archive/albums/cc161/eloopnai/SS103143.jpg)

on my other goose a 81 the middle section of the crank is shorter which is what i need for this one i presume ?
but i thought there was only one size crank for bmx bikes ? just the arm length differed ?
ive got some redline 3 piece cranks on there way soon will these fit i hope so the money they cost  :LolLolLolLol:
ive put a spacer washer in but its still not enough is there somin wrong with my bike ?

im totally confused hope someone could help me please  :D

Title: Re: crank trouble still
Post by: Rombloke on April 03, 2008, 06:06 PM

unfortunatley one piece cranks are 'set'

so what you need to do is maybe put an extra washer between the chain ring/spider and the drive side bearing race, thus pulling the cranks 'through' the bb by the thickness of the washer.

make sense?

Dave

Title: Re: crank trouble still
Post by: eloopnai on April 03, 2008, 06:35 PM

cheers will try that  :daumenhoch:

Title: Re: crank trouble still
Post by: eloopnai on April 03, 2008, 07:07 PM

ok with some washers in its levalled it up now ive fooking forgot what way round the bearings sit balls into the cups or away from the cups  :LolLolLolLol:

Title: Re: crank trouble still
Post by: jackel on April 03, 2008, 07:31 PM

balls into cups learnt this the hard way back in the day :)

Title: Re: crank trouble still
Post by: eloopnai on April 03, 2008, 09:38 PM

cheers :)

Title: Re: crank trouble still
Post by: eloopnai on April 05, 2008, 09:36 AM

now im more confused then the other day postman just delivered a takagi cro mo 24tpi one piece crank its a different size to the others ive got the middle part is shorter so will fit perfectly without a huge spacer ( or rather  part of a headset  :LolLolLolLol: )
so there defo is 2 different size one piece cranks


(http://www.radbmx.co.uk/archive/albums/cc161/eloopnai/SS103189.jpg)


 :D  :D  :D

Title: Re: crank trouble still
Post by: Gary72 on April 05, 2008, 09:42 AM

I think some BB shells are different widths, and some 3 piece cranks come with 2 spacer tubes for this reason, no idea what frame makers had what size's though.

Title: Re: crank trouble still
Post by: eloopnai on April 05, 2008, 09:53 AM

cheers for that gary confirms what i was thinking  :daumenhoch:
thought i had a moody bike for a minute

just hoping the redline flites that are on there way fit although im sure i could get a shorter spindle if needed
more fun and games when they arrive