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PostPosted: Mon Nov 21, 2011 2:05 pm 
MacRetro rider
MacRetro rider
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Joined: Fri Mar 09, 2007 2:11 pm
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Location: DUNDEE
I'm waiting for a bike for this too, something mid - late 80's ...
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PostPosted: Thu Nov 24, 2011 2:44 am 
Devout Dirtbag
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Joined: Tue Sep 04, 2007 2:08 am
Posts: 106
Location: Nor-Cal
Some Charlie Cunningham modified Suntour Roller Cam Brakes

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PostPosted: Wed Oct 02, 2013 12:32 pm 
Gold Trader / PoTM Winner / RB Rider
Gold Trader / PoTM Winner / RB Rider
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Joined: Tue Feb 26, 2013 6:26 pm
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Location: 54 Festive Road Winchcombe GLOUCS Yarp...
What does the thumbwheel cam do on the right side? Just fitted this instead of an Exage mountain.


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PostPosted: Wed Oct 02, 2013 4:12 pm 
MacRetro rider
MacRetro rider

Joined: Fri Feb 09, 2007 4:16 pm
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Your picture shows a U-Brake not a Roller Cam Brake so not sure what right hand cam your referring too ?


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PostPosted: Wed Oct 02, 2013 4:33 pm 
Retro Guru
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Joined: Tue Oct 06, 2009 5:51 pm
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Location: Bay Area
The thumb wheel is for adjusting the center-center distance of the bridge so that it can be fit to frames/forks with slightly different spacing between posts. Also might be useful for applying some preload in the system to help braking performance.


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PostPosted: Wed Oct 02, 2013 4:51 pm 
Gold Trader / PoTM Winner / RB Rider
Gold Trader / PoTM Winner / RB Rider
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Joined: Tue Feb 26, 2013 6:26 pm
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Location: 54 Festive Road Winchcombe GLOUCS Yarp...
Thanks. Makes perfect sense. Not sure why it's needed though.


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PostPosted: Wed Oct 02, 2013 4:58 pm 
Gold Trader / MacRetro rider
Gold Trader / MacRetro rider

Joined: Thu May 06, 2010 10:05 pm
Posts: 5640
Location: Aberdeen
A couple for comparison...

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And the Suntour XCD4050 fitted to my 88' Stumpy...

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PostPosted: Wed Oct 02, 2013 5:01 pm 
Retro Guru
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Location: Bay Area
The History Man wrote:
Thanks. Makes perfect sense. Not sure why it's needed though.



Well how would you solve the problem of mass manufacturing a U-brake with a booster bridge that will fit posts that are 88, 89, 90, or 91 mm apart? Seems like a pretty ingenious solution to me. The other options being to provide an un-drilled booster that is drilled with the proper spacing at the time of installation (e.g. WTB) or possible providing slots instead of holes (e.g. MRC and many others).


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PostPosted: Wed Oct 02, 2013 5:08 pm 
Gold Trader / PoTM Winner / RB Rider
Gold Trader / PoTM Winner / RB Rider
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Joined: Tue Feb 26, 2013 6:26 pm
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Location: 54 Festive Road Winchcombe GLOUCS Yarp...
Was just that I have two exage mountain versions with no adjustment. Didn't think about the cam on setup and hasn't seemed to make any difference between the two types.

Very nicely engineered all the same.


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PostPosted: Thu Oct 03, 2013 6:13 pm 
BoTY & PoTM Winner
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Joined: Thu Feb 05, 2009 3:44 pm
Posts: 457
Location: madstop city
Wtb Phoenix with rollercam in the front and togglecam in the back

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still need a booster for that, if somebody has a great idea where to get one, let me know....
brodie catalyst´s with xt and mrc

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cheers kay


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