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PostPosted: Mon Jul 18, 2011 10:55 pm 

Joined: Mon Jul 18, 2011 9:53 pm
Posts: 46
Hi everyone - I have searched on previous topics, but couldn't find an answer for this:
I need to get new (headset) bearings for a Cannondale System six.

I believe the top bearing is 1 1/8 45x45, but what are the exact specs for the bottom bearing?

The FSA 1.5" bearing 90d shoulder MR069 seems to be what I need, but I just want to be 100% sure.
Will the bearings of a FSA Orbit C-40 headset fit fine?

Any help is appreciated - thank you!

PostPosted: Tue Jul 19, 2011 1:28 am 

Joined: Mon Apr 11, 2011 6:28 pm
Posts: 204
Location: Palm Coast, Fl.
This is the headset that you need. How do I know this because I have a sytemsix with this exact headset. Don't waste your time trying to find something that does not work. http://www.cannondaleexperts.com/Cannon ... p_229.html

Shoemakerpom2010 :thumbup:

PostPosted: Tue Jul 19, 2011 1:49 am 

Joined: Mon Jul 18, 2011 9:53 pm
Posts: 46
Thanks for your reply.
Yes indeed the original Cannondale headset would fit fine, but I don't need a complete headset, just the bearings.

The FSA 1.5" bearing seems to be a close match - bearing I.D. and O.D. are the same, I just wanted to confirm.

PostPosted: Tue Jul 19, 2011 1:57 am 

Joined: Sat Nov 14, 2009 6:30 am
Posts: 845
Location: So Cal
I called Cannondale and they said the lower bearing has a 52mm OD and is 45/45 angular contact bearing.

I'm going to order the Cf-40 and hoping that it'll work with the Easton SL Taper fork.

PostPosted: Fri Mar 08, 2013 11:15 pm 

Joined: Sun May 25, 2008 10:12 pm
Posts: 914
Location: italy
aanyone changed the upper bearing reducer ?


PostPosted: Sat Aug 02, 2014 11:51 am 

Joined: Sun Dec 03, 2006 1:45 am
Posts: 150
Sorry to bring up an old post, but I'm currently trying to work out what top bearing I need.

I ordered a bearing described as being for the System Six from Qwerty Cycles, but when I removed mine I realised my original bearing had a taller stack height and had 45x45 870ACB stamped on it whereas in the description on Qwerty only 45 is mentioned and nothing is stamped on the bearing. I don't want to spend £70 on a complete headset when I only need one bearing :(


PostPosted: Sat Aug 02, 2014 2:35 pm 

Joined: Fri Dec 11, 2009 10:38 pm
Posts: 1513
Location: Welland, Ontario
There's really only 2 types of 1 1/8" headset bearings in common use, one of them being the Campy std 45 deg. Other manufacturers coyly refer to it as the "Italian" std. and you often see "it" or "is" in the part# for such a bearing.

for example http://store.canecreek.com/p/40-is41-carbon-tall-top-assembly/headsets_40-series_integrated?pp=25

From the early days, Cannondale used Campy headsets, and still use the standard.

There's sometimes a buggy.
How many drivers does a buggy have?


So let's just say I'm drivin' this buggy...
and if you fix your attitude you can ride along with me.


PostPosted: Sat Aug 02, 2014 4:15 pm 

Joined: Sat Jul 29, 2006 2:36 am
Posts: 1229
Location: UK
Mr_Carlos, bikerjulio is correct. 45x45 870ACB is a Campag spec bearing.

The exact size is 41.8 O/D,1-1/8", 45x45deg and 8mm thick. Any decent bike should have one / be able to get one.

Alternatively try Wiggle and CRC.

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