PITFALLS CONVERTING COTTERED 2 COTTERLESS

User avatar
oldschoolfool
Posts: 118
Joined: Fri Jul 31, 2009 10:41 am
Location: Adelaide, South Australia.

PITFALLS CONVERTING COTTERED 2 COTTERLESS

Postby oldschoolfool » Sun Aug 30, 2009 1:49 pm

I'm making the change from cottered cranks to cotterless but there is a plethora of options. I'd like to retain the bottom bracket bearings that i have but need the crankshaft to be compatible. :? Seeking wisdom from anyone!!
    Tange Free Zone

User avatar
Lark2004
Posts: 1455
Joined: Sat Aug 09, 2008 3:02 pm
Location: Lawnton, 25k north of Brisbane

Re: PITFALLS CONVERTING COTTERED 2 COTTERLESS

Postby Lark2004 » Sun Aug 30, 2009 2:06 pm

why?

Just get a new cartridge BB like this and be done with all the fiddling around.
Image

They are about $20 - $25 at your LBS.
Andrew

User avatar
hartleymartin
Posts: 5091
Joined: Thu Feb 19, 2009 6:56 pm
Location: Old Toongabbie, NSW
Contact:

Re: PITFALLS CONVERTING COTTERED 2 COTTERLESS

Postby hartleymartin » Sun Aug 30, 2009 11:45 pm

The $25 price tag has me somewhat relieved. I am going to have a go at a modernised roadster, and I will be going over to cotterless cranks for that project.
Martin Christopher Hartley

http://raleightwenty.webs.com - the top web resource for the Raleigh Twenty
http://madmartysblog.blogspot.com - my cycling adventures

User avatar
oldschoolfool
Posts: 118
Joined: Fri Jul 31, 2009 10:41 am
Location: Adelaide, South Australia.

Re: PITFALLS CONVERTING COTTERED 2 COTTERLESS

Postby oldschoolfool » Wed Sep 02, 2009 9:59 am

Lark2004 wrote:why?

Just get a new cartridge BB like this and be done with all the fiddling around.
Image

They are about $20 - $25 at your LBS.


Very neat, cheap... best idea so far!!
    Tange Free Zone

User avatar
oldschoolfool
Posts: 118
Joined: Fri Jul 31, 2009 10:41 am
Location: Adelaide, South Australia.

Re: PITFALLS CONVERTING COTTERED 2 COTTERLESS

Postby oldschoolfool » Wed Sep 02, 2009 10:02 am

I would still like to pursue retaining stronglight bearings.
    Tange Free Zone

solocmv
Posts: 2
Joined: Sat Jun 13, 2009 9:43 pm

Re: PITFALLS CONVERTING COTTERED 2 COTTERLESS

Postby solocmv » Wed Oct 21, 2009 9:28 pm

Ok All,

How do you convert an old non threaded Malvern Star bb to one of these sealed bearings

Cheers
Solocmv.

User avatar
Lark2004
Posts: 1455
Joined: Sat Aug 09, 2008 3:02 pm
Location: Lawnton, 25k north of Brisbane

Re: PITFALLS CONVERTING COTTERED 2 COTTERLESS

Postby Lark2004 » Wed Oct 21, 2009 9:56 pm

no idea..... :?
Andrew

User avatar
hartleymartin
Posts: 5091
Joined: Thu Feb 19, 2009 6:56 pm
Location: Old Toongabbie, NSW
Contact:

Re: PITFALLS CONVERTING COTTERED 2 COTTERLESS

Postby hartleymartin » Thu Oct 22, 2009 9:43 am

You can get self-tightening (expanding) bottom-brackets - they are designed to fit into frames with damaged threads.

http://www.bicorp.com.au/ProductBrowse.aspx?Category=PGP154&CatDesc=B.B.+UNITS+%28CARTRIDGE%29
Martin Christopher Hartley

http://raleightwenty.webs.com - the top web resource for the Raleigh Twenty
http://madmartysblog.blogspot.com - my cycling adventures

User avatar
oldschoolfool
Posts: 118
Joined: Fri Jul 31, 2009 10:41 am
Location: Adelaide, South Australia.

Re: PITFALLS CONVERTING COTTERED 2 COTTERLESS

Postby oldschoolfool » Tue Dec 21, 2010 11:54 am

Lark2004 wrote:why?

Just get a new cartridge BB like this and be done with all the fiddling around.
Image

They are about $20 - $25 at your LBS.


Just be aware that the thread length in the bottom bracket shell may not be long enough. Some fitting may be required!
    Tange Free Zone

idw
Posts: 64
Joined: Mon Oct 04, 2010 8:47 pm
Location: macedon rangers

Re: PITFALLS CONVERTING COTTERED 2 COTTERLESS

Postby idw » Tue Dec 21, 2010 10:09 pm

if its a one piece BB just buy one of these http://cgi.ebay.com.au/BMX-BB-Adapter-Convertor-Standard-MTB-BB-/220699885457?pt=AU_Sport_Cycling_Parts&hash=item3362bcff91
just go to your LBS or grab one of ebay. use a drift to bang out the bearing cups and BAM bobs your uncle (funny thing is my uncle is a bob)

User avatar
Quinns Rocks Roadie
Posts: 360
Joined: Mon Oct 11, 2010 2:57 pm
Location: Perth, Quinns Rocks. 150m from the beach.

Prior Preparation.....

Postby Quinns Rocks Roadie » Tue Dec 21, 2010 10:16 pm

oldschoolfool wrote:I'm making the change from cottered cranks to cotterless but there is a plethora of options. I'd like to retain the bottom bracket bearings that i have but need the crankshaft to be compatible. :? Seeking wisdom from anyone!!

What kind of bike do you have now, and what is the bottom bracket shell width (frame only, not the existing cups) ?.

Eric.
Newer does not automatically mean betterer.

User avatar
sturmey archer
Posts: 237
Joined: Tue May 04, 2010 8:14 pm
Location: Melbourne

Re: PITFALLS CONVERTING COTTERED 2 COTTERLESS

Postby sturmey archer » Tue Dec 21, 2010 10:35 pm

solocmv wrote:Ok All,

How do you convert an old non threaded Malvern Star bb to one of these sealed bearings


Will one of these do it ? http://www.bike-parts-plus-more.com.au/shopexd.asp?id=37344 They have a range of spindle widths listed.
1.370" x 24 tpi - what sort of stupid standard is that?

Who is online

Users browsing this forum: No registered users