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Technical & Reference Section => Tech and Restoration => Topic started by: GavinKent on February 19, 2011, 01:50 PM

Title: bottom bracket query
Post by: GavinKent on February 19, 2011, 01:50 PM

hi all

i'll try to explain this as best i can.  i bought a mongoose crank to replace the generic one i have on my cali.  i took it apart and when i started fitting the chain wheel on to the new crank, the nut didnt do up fully - there is one washer/spacer, but it seems on this crank i'd need two of them to make up the space .  i checked the bottom bracket packet which i'd kept and there is no extra washer.  am i right in thinking it just needs another washer, and can i just purchase one of those?

hope this makes sense and would appreciate some advice

thanks in advance
gav

Title: Re: bottom bracket query
Post by: HEYWOOD BMX on February 19, 2011, 01:57 PM

 :) Do you have any pics and show me the part you need? I have loads of BB bits spare :daumenhoch:

Title: Re: bottom bracket query
Post by: Hootski70 on February 19, 2011, 02:13 PM

Are you using a genuine goose b/b , as the older goose opc's were 28tpi , normal bb 24tpi .

Title: Re: bottom bracket query
Post by: GavinKent on February 19, 2011, 02:43 PM

no, afraid this isnt a goose bb - here is the pic - you'll see the space - it's like the threaded bit on the crank doesnt go down far enough to enable the nut to tighten up completely

thanks both -

(http://www.radbmx.co.uk/archive/albums/k8/Scott1111/IMGP0288.jpg)

Title: Re: bottom bracket query
Post by: oldskooldayz on February 19, 2011, 02:50 PM

Looks to me like that is the wrong nut buddy

not an old school type from all the ones ive fitted

it should have a recess on the flat side of about 1/2 cm if that makes sense to ya as thats what clears the gap

heres a pic of the type you should be useing

(http://www.radbmx.co.uk/archive/albums/ww235/busbug_2009/IMG_5017.jpg)

Title: Re: bottom bracket query
Post by: GavinKent on February 19, 2011, 03:01 PM

ahhhh, right - i see - in that case, i need to buy another bottom bracket - cool, at least i now know where im going wrong

thanks a lot
gav

Title: Re: bottom bracket query
Post by: oldskooldayz on February 19, 2011, 03:03 PM

loads for sale on here mate maybe voivod has a complete one for ya  :daumenhoch:

if not i might but ask him first  :daumenhoch:

Title: Re: bottom bracket query
Post by: GavinKent on February 19, 2011, 03:06 PM

thanks all

Title: Re: bottom bracket query
Post by: stfc on February 19, 2011, 08:30 PM

Failing that sell me your crank and buy another, you,ll never find a mongoose b/b  ;)

Title: Re: bottom bracket query
Post by: 58 delray on February 19, 2011, 10:38 PM

loads on ebay

http://cgi.ebay.co.uk/28-tpi-schwinn-bmx-one-piece-crank-bottom-bracket-set-/290516086747?pt=Cycling_Parts_Accessories&hash=item43a41bafdb