Shimano Press Fit / BB71 Bottom Brackets confusion ...

Workshop tales, trials and disasters.
Maintenance tips, techniques and myths.
Technical discussion, description and outright lies

Shimano Press Fit / BB71 Bottom Brackets confusion ...

Postby PaulMoran » Thu Oct 11, 2012 7:10 am

Hi All -

potentially retarded question - but the multitude of BB standards leaves me fairly confused ....

What road cranks are compatible with the Shimano Press Fit BB71 BB ?

and are there any adapters to use BB30 cranks in this BB71 ?

I like the FSA K-Force Light compact crankset ....but looks like its only made for BB30 or MEGAEXO or 386EVO ...

thanks for clearing this up - cheers

Paul
PaulMoran
 
Posts: 56
Joined: Fri Mar 02, 2012 7:33 am
Location: The Shire

by BNA » Thu Oct 11, 2012 12:09 pm

BNA
 

Re: Shimano Press Fit / BB71 Bottom Brackets confusion ...

Postby MichaelB » Thu Oct 11, 2012 12:09 pm

This is a good document (published by FSA) with an FSA viewpoint.

Also shows how screwed up all the "standards" have become, much like headsets ...

Such a PITA ....

http://www.qbp.com/diagrams/TechInfo/FSA/externalbbfitchart.pdf
User avatar
MichaelB
 
Posts: 6824
Joined: Tue Feb 20, 2007 8:29 am
Location: Adelaide, South Australia

Re: Shimano Press Fit / BB71 Bottom Brackets confusion ...

Postby PaulMoran » Thu Oct 11, 2012 12:21 pm

Thanks Michael -

just had a quick flick through .....but cant see the BB71 outlined anywhere ?

another example here - http://www.giant-bicycles.com/en-au/bik ... ifications

"Dura-Ace Press Fit" ...u reckon i could safely assume this a a PF30 BB ??

so (freaking confusing!!)

Cheers for your help mate!!

Paul
PaulMoran
 
Posts: 56
Joined: Fri Mar 02, 2012 7:33 am
Location: The Shire

Re: Shimano Press Fit / BB71 Bottom Brackets confusion ...

Postby MichaelB » Fri Oct 12, 2012 10:31 am

Next option is to contact a manufacturer of adaptors (such as HSC Ceramics in Aus) and ask.

Just specify what frame you have and what crank, and they'll set you straight

http://www.hscceramics.com.au/HSC-Bike-Ceramic-Bottom-Bracket/onlineshop-BottomBracket.html

Have a look here, as it states the shell ID's and widths, so you may need to measure to get a better understanding of what you actually have.

Whether ceramics are worth it, is another thread entirely :wink:
User avatar
MichaelB
 
Posts: 6824
Joined: Tue Feb 20, 2007 8:29 am
Location: Adelaide, South Australia

Re: Shimano Press Fit / BB71 Bottom Brackets confusion ...

Postby old al » Thu Oct 18, 2012 6:50 pm

Good video on bottom bracket standards. No mention of BB71 though.

http://www.youtube.com/watch?v=AftPKuX_tyo

Al.
User avatar
old al
 
Posts: 268
Joined: Wed Nov 24, 2010 11:42 am
Location: Pelaw Main Hunter Valley NSW

Re: Shimano Press Fit / BB71 Bottom Brackets confusion ...

Postby ozdavo » Thu Oct 18, 2012 7:27 pm

Shimano BB71 press fit is not a standard, but a model of BB. I believe it conforms to BB86 standard, and suits Shimano Hollowtech II cranks.
http://tbsm.com.au/bike-parts/drivetrain/bottom-brackets/shimano-sm-bb71-press-fit-road-bottom-bracket-
Always looking for new rides & ride partners in SE QLD area
User avatar
ozdavo
 
Posts: 946
Joined: Mon Jul 25, 2011 12:03 pm
Location: Gold Coast (nth)

Re: Shimano Press Fit / BB71 Bottom Brackets confusion ...

Postby Nobody » Tue Mar 12, 2013 6:17 pm

Nobody
 
Posts: 6488
Joined: Thu Sep 18, 2008 12:10 pm
Location: Sydney


Return to The Shed

Who is online

Users browsing this forum: No registered users



Support BNA
Click for online shops
Torpedo 7 Torpedo7 AU
Ground Effect Ground Effect NZ
Chain Reaction Cycles CRC UK
Wiggle Wiggle UK
Cycling Express Cycling Express
Ebay Ebay AU
ProBikeKit ProBikeKit UK
Evans Cycles Evans Cycles UK
JensonUSA Jenson USA
JensonUSA Competitive Cyclist
cron