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Technical & Reference Section => Tech and Restoration => Topic started by: skippyg on April 07, 2014, 05:23 PM
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hi there,
ive strip out my 87 mongoose decade ready for powderm,when I took the bottom bracket apart
on oneside it says mongoose and on the other side it has 28 stamped on it,does this mean it is
a 28tpi bottom bracket?
my question is would it be easier to swap it for a 24tpi bottom bracket as it seems nearly all
cranks seem to be 24tpi and therefore will I can get a crank a lot easier
many thanks for your help and opinions on this
:daumenhoch:
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As far as I know mongoose used 28tpi up to middle of 82 then 82 onwards changed to 24tpi.
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And yeah, you can swap to a 24tpi no problem :daumenhoch:
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cheers guys,24 tpi it is then :daumenhoch:
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On all the goose's I've had up to 85 all had 28tpi one piece cranks and bottom brackets. :) Never had an 86 so cant comment on them. :-\ By the sounds of it if yours is an 87 they were still using them then. :)
24tpi cranks and bottom brackets are a lot easier to source. :daumenhoch:
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that's what I thought BMX1973,dont see many 28 tpi cranks for sale
I think the bottom bracket and crankhas been replace with one from an earlier mongoose
as the crank is only 165 and has mongoose on it(I think a mongoose motomag had them fitted)
and from the spec sheet for an 87 decade it should be a 175 sr crank :daumenhoch:
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that's what I thought BMX1973,dont see many 28 tpi cranks for sale
I think the bottom bracket and crankhas been replace with one from an earlier mongoose
as the crank is only 165 and has mongoose on it(I think a mongoose motomag had them fitted)
and from the spec sheet for an 87 decade it should be a 175 sr crank :daumenhoch:
I run a 165 on my motomag as i like a short crank on it. It was original to a minigoose :daumenhoch:
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thanks insectbones :daumenhoch: ,so it does have the wrong crank on it? as im new to all this really