Matched mechanical callipers

Joined
Sep 16, 2018
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598
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Netherlands
There's 3mm of body adjustment on the red ones. I don't have a bb7 at the moment to compare.
Ok that is enough to set them good.

The only thing I want yo know is the braking power. As tgat is hoos, than I will order them and make a 3d model. Probably also get the black, because it is easier to make that the dist is ad the right pisition.
With theodel, I now where to make the mounting for each size disk.

I hope that they have a hood braking power.
 
Joined
Oct 19, 2012
Messages
1,175
Location
Wakefield, UK
You may want to try these too. The measurements suggest they are the correct fit for the red ones.


And - or these for the black ones.


Though as ever regular organic / resin pads almost always provide more initial bite and better feel. The harder pads are better under extreme braking only usually.
 
Joined
Oct 19, 2012
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To compare brake effectiveness I was thinking of using a pair of basic forks to mount a disc hub with disc (the disc hub must be made turnable via the axle nut) and weld a bit of handlebar about a foot away from the disc for a brake lever. Make the caliper mounts for these and BB7 and then using a C-clamp to apply the brake (no outer cable) and a spoke tension gauge measure the tension on the brake cable to enure it's the same for all three callipers. A torque wrench can be used to measure the rotor moving point.

It's a basic test of initial bite only with the brake warming up or fade not measured but at least doable.
 

Twinkle

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Apr 14, 2013
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Peacehaven nr Brighton, Sussex ,UK
I found a couple of problem with a pair like that ?

Impossible to get replacement pads for them.

They do not use standard bicycle mountings

So when you wear out the pads you are stuffed
When you decided the performance is sadly lacking you can't bolt on a set of Avids you are stuffed
Graham Clarke a Basingstoke seller on ebay had plenty of replacement pads for those calipers , l got a load of them . Main problem is the chrome rusts quickly. They do fit standard mtb mounts , we have used them for years .
 
Joined
Oct 19, 2012
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Wakefield, UK
Emma is correct - they do fit a std IS mount. I wonder how I was labouring under the wrong impression? Presumably the non-standard shape of the mount threw me. :unsure:










The last pic looks like it doesn't match but it does. It's just the camera angle.
 
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