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Oversize brake housing (6 mm), cable (2 mm) and ends (7.75 mm) for vintage MTB

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Oversize brake housing (6 mm), cable (2 mm) and ends (7.75 mm) for vintage MTB

Old 07-27-20, 03:15 PM
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Charles Wahl
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Oversize brake housing (6 mm), cable (2 mm) and ends (7.75 mm) for vintage MTB

I recently bought a 1984 Specialized Stumpjumper (Sport) in beautiful condition, and am refurbishing it for my cousin. While the existing brake cables are working OK, the housing and cable ends are a bit gnarly, and they're old-style equipment: unlined housings and cables that are not particularly slick like modern ones. They're (as I've just learned) oversize cables with oversize housings and ends, The brake levers on this bike are a Shimano version of the Magura motorcycle levers that were on the original year Stumpjumper.

If I want to replace them as OEM, I can probably find 6 mm housings and 2 mm cables, though maybe not in the US. They'd look original (good) and work like it too (okay, but not optimal).

OTOH, I could go with standard modern cable and housing -- this bike is never going to be ridden hard and put away wet -- and compensate by using heat-shrink tubing or tape to increase diameter at the ends and the braze-ons, and some kind of partial sleeve to augment the diameter of the cable terminals.

What would you all do?

You can see the bike here: https://www.flickr.com/photos/131757...57714934167376
There's also this later-model Hard Rock that I've refurbed and given to his spouse (already being ridden): https://www.flickr.com/photos/131757...57714935060592
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Old 07-27-20, 04:14 PM
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I finished a rebuild of a similar SJ sport recently.

check out the pork chop BMX cables. They are 5MM

on my build I used a Modern jag wire set, and the results were good.

In my brake levers there was an additional oversized stop that made fitting the cable to the adjuster more snug. I think it came with the levers.

also on the ball ends to the brake cables had A brass crescent shape shim. I would save these if you have them. Made the ball ends fit better in the levers.

pic:


Specialized STUMPJUMER Sport

Last edited by intron; 07-27-20 at 04:21 PM.
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Old 07-27-20, 04:29 PM
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I've got quite a few of the complete, original oversized brake cable sets, Specialized brand. PM if you'd like me to dig them up.
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Old 07-27-20, 05:55 PM
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Sure! PM sent. Black housing?
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Old 07-28-20, 09:29 AM
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Originally Posted by dddd View Post
I've got quite a few of the complete, original oversized brake cable sets, Specialized brand. PM if you'd like me to dig them up.
PM sent. Behind Charles, of course.

Originally Posted by Charles Wahl View Post
Sure! PM sent. Black housing?
Disreali Gears, as in the Disreali Gears?
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Old 07-28-20, 10:02 AM
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Charles Wahl
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Originally Posted by tricky View Post
PM sent. Behind Charles, of course.
Disreali Gears, as in the Disreali Gears?
No, I'm not Mike Sweatman, the UK proprietor of that great site. Anyway, it's Disraeli, like the Victorian prime minister, which is the crux of the joke that begat the album title: Disraeli Gears - a derailleur collection
I just appreciate the humor, and knew this before I ever ran into Sweatman's collection.
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Old 07-28-20, 10:54 AM
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Boulder Bicycle had some NOS a while back. And Ebay sometimes too.
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