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PostPosted: Tue Jun 27, 2006 8:07 am 
retrobike rider
retrobike rider

Joined: Sat Aug 13, 2005 6:30 am
Posts: 356
How do I identify different models, I need to know if I need different spindle lengths for different crank types.I want to run them in a modern frame.I am led to believe I will need 122mm spindle for original cook bros,does this length shorten with later cook cranks.
i would post a pic of cranks but that is beyond my computer skills.

Regards colin


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PostPosted: Tue Jun 27, 2006 8:45 am 
Gold Trader / PoTM Winner / RB Rider
Gold Trader / PoTM Winner / RB Rider
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Joined: Wed Oct 05, 2005 7:45 pm
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Location: kent
I have an e type and a smaller axle does the job .

earlier cranks were straight so you need a longer axle , otherwise you are going to touch the frame . later models are curved .


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PostPosted: Tue Jun 27, 2006 9:03 am 
retrobike rider
retrobike rider

Joined: Sat Aug 13, 2005 6:30 am
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my cranks are the later curved model then.
Using these cranks on a 1998 p7 presently with a110 spindle which is giving me 45mm distance from c/l of down tube to middle ring. I think I should be aiming for 47.5mm. so if I use a 115-117 mm spindle I should get it about right?
I want to put these cranks on a airborne lucky strike ti frame running 8speed and will all the above still apply.?

Regards Colin


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PostPosted: Tue Jun 27, 2006 9:26 am 
BoTM Winner
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Joined: Thu Jan 19, 2006 1:23 pm
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Location: NW England
Sounds about right although I usually use the less scientific method of the shortest axle that allows the arms to clear the chainstay by about 5mm :D


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PostPosted: Tue Jun 27, 2006 9:26 am 
Gold Trader / PoTM Winner / RB Rider
Gold Trader / PoTM Winner / RB Rider
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Joined: Wed Oct 05, 2005 7:45 pm
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Location: kent
before you check your chain line , make sure that your cranks dont touch your frame . ( it should be ok ) .

usually the lengh of the bb is dependant of the chainset , not the frame , so you should be ok .


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PostPosted: Tue Jun 27, 2006 10:37 pm 
Old School Grand Master

Joined: Wed Jun 29, 2005 11:18 am
Posts: 15807
Location: near cwmcarn
older cbr & rsr deffo need longer axles, up to & even longer than 127mm for certain frames. http://www.bikepro.com/products/cranks/cooks.html
e cranks & the later forged f cranks use a shorter, more recent 110-113mm bb axle. tho theres never a golden rule, which is probs why I always tend to hav twice as many BBs as I need :(


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PostPosted: Wed Jun 28, 2006 9:49 pm 
retrobike rider
retrobike rider

Joined: Sat Aug 13, 2005 6:30 am
Posts: 356
Thanks for the info Scant ,The link was very helpfull.Looks like I need 113 spindle length.I need a quality 113 bottom bracket now preferably aTi one"becoming a bit of aweight weenie in my old age".Any body got one.All the ones I see on ebay seem to be 110mm.Could I getaway with 110 or best to hang on for113?

Regards Colin

P.s This build is a replacement for my manitou hardtail which was stolen.Gone for a modern frame but all components will be old school stuff I have got laying around.


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PostPosted: Thu Jun 29, 2006 8:59 am 
Old School Grand Master

Joined: Wed Jun 29, 2005 11:18 am
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Location: near cwmcarn
gaf was selling a "real" b..bracket recently. for the price un72s are also respectable weight with decent lifespan :)


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PostPosted: Fri Jun 30, 2006 11:55 pm 
Mr Darcy
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Joined: Wed Oct 26, 2005 8:36 pm
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Location: Bicester
I am running a 113mm un73 with RSRs and all seems swell if thats any help


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PostPosted: Sat Jul 01, 2006 7:25 am 
Old School Grand Master

Joined: Wed Jun 29, 2005 11:18 am
Posts: 15807
Location: near cwmcarn
what frame is that on gump? thats well short for RSRs!


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