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Old 11-23-10, 12:05 AM
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Find This Part..

Wasnt sure if this should go in the vintage bike thread but here it goes...
I came across some cool looking U shaped center pull brakes and it turns out they are the old Self Energizing pedersen-patent calipers. I would love to see them put on my vintage pine trail Marin, replacing the old Shimano's that are located under the chainstays, but they are missing most of the mounting hardware. The calipers I found are in good condition but the springs and tightening bolts are missing. Is their any way I could restore these brakes? Did the Scott PE brakes use a unique spring mechanism? Does anyone use these breaks?. I love the lightweight/military look haha.. Advice? I'm really determined to get these working..
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Old 11-27-10, 03:28 PM
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I have a set of Suntour cantilever brakes that are peterson design and they have a different main body than the self energizing brakes. So I think that if both brakes were the self energizing type that the internals would be the same and the mounting bolts didn't matter. If I remember there was a 13mm nut on 1 side of the base of the brake that held the spring and this is how you adjusted the preload of the caliper between sides. Also the old Roller cam brakes will use the same frame mount if you want some thing different and give a lot of power as well. Good luck.
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Old 11-27-10, 10:25 PM
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Originally Posted by sKiLLeD
Wasnt sure if this should go in the vintage bike thread but here it goes...
I came across some cool looking U shaped center pull brakes and it turns out they are the old Self Energizing pedersen-patent calipers. I would love to see them put on my vintage pine trail Marin, replacing the old Shimano's that are located under the chainstays, but they are missing most of the mounting hardware. The calipers I found are in good condition but the springs and tightening bolts are missing. Is their any way I could restore these brakes? Did the Scott PE brakes use a unique spring mechanism? Does anyone use these brakes?. I love the lightweight/military look haha.. Advice? I'm really determined to get these working..
Mounting bolts are relatively universal, but return springs are usually specific to the particular brake. I don't know where to point you for the springs- the old Suntour USA is long gone. You can ask the current Suntour company if they have old spare parts.

I did find some Suntour XC Scott Pederson self energizing cantilevers: https://the-bici.com/index.php?_a=viewProd&productId=692

Scott (brakes) is still around. Maybe they can point you at a supplier: https://www.scottsbr.com

Here's a photo of a Scott SE U-brake on a GT frame. Note that a U-brake mounted under the chainstays would be different, since the "self energizing" mechanism would need to work in the opposite direction.

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Old 11-29-10, 01:54 PM
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Yea those are the ones I have. The U design is unique but unfortunately I have chain-stay brake mounts. O well...they might be worth something to someone..
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Old 11-29-10, 06:19 PM
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Self-Energizing bicycle brakes are an idea whose time never came, fortunately. Their non-linear application force was a good recipe for locking the wheels and doing a header. Jobst Brandt had some very harsh words for the whole concept. There are good reasons they disappeared from the market and we are well rid of them.
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