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RADBMX.CO.UK  |  Technical & Reference Section  |  Tech and Restoration  |  crank differences
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Author Topic: crank differences  (Read 562 times)

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ablister

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crank differences
« on: September 04, 2006, 09:47 PM »
hi, please can someone tell me the differences between the crank BB sizes. USA, Euro, mid etc and how do i know what i have?

thanks, ali

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selfpreservation

  • Guest
Re: crank differences
« Reply #1 on: September 04, 2006, 09:52 PM »
new school bikes tend to have euro bb old school usually have US bb you can tell by looking a US bb is about 2 inches diameter and a euro is 19mm 3/4 an inch so its pretty easy to tell , also mongoose bb have a different thread to standard bb/cranks
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ablister

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Re: crank differences
« Reply #2 on: September 04, 2006, 10:07 PM »
thanks  :D
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MeddlE

  • Guest
Re: crank differences
« Reply #3 on: September 05, 2006, 10:16 AM »
US BB have press in cups, Euro has smaller screw in cups, mid has no cups as the bearings press straight into the frame.
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Offline brass monkey!

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Re: crank differences
« Reply #4 on: September 05, 2006, 12:08 PM »
New School BB's are also the same size as Mountain Bike BB's - so I believe !
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