roller-cam brakes

[focomat 1c]

Its even more fun setting them up when you first realise they are not compatible with standard brake pivots !

I have a boxed set of nos XC6000's and a pair of brake pivots are included with dimensions to show where they should be brazed onto a frame .

My Muddy Fox Trailblazer ( 1989 ) came with XCD 6000's on the chainstays , they work ok but have always had a distinct lack of feel .

I suspect that the shape of the cam could be altered slightly to improve this ?

 

[raidan73]

http://www.retrobike.co.uk/gallery2/main.php?g2_itemId=87910
The link above is quite useful, especially in getting the cam plate in the right position on the rollers for maximum efficiency. I've had them on a couple of bikes and didn't find them particularly difficult to set up. I had the XCD versions on the front and rear of my Brodie Sovereign and found them to be really powerful and efficient

 

[Tsundere]

http://www.retrobike.co.uk/gallery2/main.php?g2_itemId=87910
The link above is quite useful, especially in getting the cam plate in the right position on the rollers for maximum efficiency. I've had them on a couple of bikes and didn't find them particularly difficult to set up. I had the XCD versions on the front and rear of my Brodie Sovereign and found them to be really powerful and efficient

Cheers, I think that link is going to be very useful. Still waiting for them to arrive along with the frame they're going on, it'll be my oldest build yet and no doubt the most challenging

 

[Skülly2]

I'm a fan, bought a Dave Yates 26r tandem made for roller-cams from someone on LFGSS MatCR (pretty sure a regular here too) in Bomo a while back, so snagged a black pair of XCD4050s pretty easily on fleabay, and love them. Have been amazed how easy they are to operate, on a camping-loaded tour with me (13st) and stoker laddie (11st), I had zero white-knuckle moments, on a tandem without a secondary brake. Almodst always ridden it Suffolk & London though so gently rolling only.

So into them in fact I really want to have a single for roller-cams now, thinking of adapting or building a clunky 700c atb of some sort with them, just trying to figure out the max dims for the bosses etc, and thinking I might try to have them mounted slightly off inside the blades/stays to make more width room below them for clearances, in the way that some canti bosses are. Obvs the bosses themselves would catch some mud etc. Thinking that with modern bigger rim widths one could spread the pivots away a bit more, might need to have a custom wider cam made too for that. I love a stupid project.

 

[Skülly2]

... and were pretty easy to set up and dial in IMO.

 

[Skülly2]

Its even more fun setting them up when you first realise they are not compatible with standard brake pivots !

I have a boxed set of nos XC6000's and a pair of brake pivots are included with dimensions to show where they should be brazed onto a frame .

My Muddy Fox Trailblazer ( 1989 ) came with XCD 6000's on the chainstays , they work ok but have always had a distinct lack of feel .

I suspect that the shape of the cam could be altered slightly to improve this ?

Hi, Iove to see that detail about the pivot spacing if you'd be willing to take a pic sometime, please?

 

[focomat 1c]

The pivots that came with XCD 6000's are designed to be mounted either slightly inside or outside the chain stay , depending on
which way round you fit them , also the shape of the chain stay itself . The rim width is the other major consideration

If you let me know your intended rim width I will check out the ideal position of the pivots based on new brake blocks set up in mid position

You would expect that the installation instructions that came with the brakes would include the dimensions required to enable the frame
builder to correctly position the pivots , that is not the case . The link above does give a dimension in the Japanese translation , but this
is of no great help . I will measure the pivot positions on the Muddy Fox Trailblazer and get back to you