Okay, i'm stumped

Mr.Toad · Nov 3, 2013

Just picked these forks up for a 80's mt bike i'm slowly gathering parts for.

Looking them over last night I noticed that the brake bosses are rotated 180 degrees from a normal canti position.

What's up with these bosses, anybody seen these before?

mattr · Nov 3, 2013

Crap quality control would be my guess!
You'll need a brake with the spring holder included (like the old onza ho). Or get a pair of springs and modify them.

Mr.Toad · Nov 3, 2013

Okay mystery solved, I think.

Searched various topics and now i'm thinking these bosses were designed for the ultra wide cantis from the early-mid 80's, like the Dia-Compe's 980's.

Found this picture from a Miyata:

mattr · Nov 3, 2013

You mean "not low profile" cantis?

My current high profile cantis use the holes in the bosses for the springs, so did the ones I used in the 80s and 90s.

I think that brake you've shown there ^^^^^ is broken, there is no straddle wire, yet it still hasn't flopped down. As there is no spring tension........

Mr.Toad · Nov 3, 2013

Yep, no springs on those brakes, nor are they the super wide profile 980's. Just posted the pic for the brake boss reference.

I wonder if you could just flip the springs in 980's to work on the outside tension holes? I have a set and will check.

Okay, i'm stumped

Mr.Toad

Senior Retro Guru

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mattr

Old School Grand Master

Mr.Toad

Senior Retro Guru

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mattr

Old School Grand Master

Mr.Toad

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