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Shimano 105 Brake Cable and Cable Ends

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Shimano 105 Brake Cable and Cable Ends

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Old 02-09-19, 12:44 PM
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RD76
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Shimano 105 Brake Cable and Cable Ends

I have seen a lot of questions and comments about cables on these forums, but have not been able to find answers to a couple of issues.
I have a Cannondale CAAD 5 (red, white and blue version) that I recently purchased a Shimano 105 R7000 groupset for to replace the assortment of components currently on it. While installing the rear brake cable, I've run into two issues:
- The Shimano tech docs include a drawing that indicates I should put a plastic end cap with a "tongue" over the brake housings that run into the front and rear frame mounted cable stops. But the end caps with tongues that were supplied with the shifters (ST-R7000) do not fit over the 5mm brake cable housings. They appear to fit over the shifter cable housing, but are too small for the brake cable. I'm trying to comply with the Shimano tech documents, but it seems like something is missing. Has anyone else seen this issue?
- There are a few silver metal end stops provided that do fit over the brake cable housing. But when I put these on, they are too big to fit into the frame mounted cable stops. The brake cable housing fits into the frame mounted stops fine by itself, but I thought a cable end stop or ferrule was required. Can I just use the cable without the end stop?
Thanks in advance for any insights.
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Old 02-11-19, 04:34 PM
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Are you saying the brake cable stops for the rear brake on your frame is too small to accept the R7000 brake cable housing with the only ferrules you have installed but the 5mm brake cable housing fits well in the frame's cable stops without a ferrule?

I've had that problem with shifter cable and inline adjusters. The ferrules that fit over the housing wouldn't go into the adjuster and the ferrule that did go into the adjuster didn't hold the cable firmly enough to allow 1 handed adjustment. This problem was with Jagwire cable and Aican adjusters. I found that 3 different brands of 4 mm shift housing varied almost 1mm OD.

Have you tried trimming the outer couting of the brake cable off to see how well it fits into the frames cable stops?
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Old 02-11-19, 06:39 PM
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I wouldn't worry about using the specified ferrule in that location. A step down ferrule should fit both the cable and the cable stop.
You can try using a correctly trimmed and squared gousing without a ferrule but better to use one if you can find one that fits.
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Old 02-11-19, 08:47 PM
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Many older Shimano side pulls don't use a ferrule at the caliper end of the casing. Do file/grind the casing windings flat though. Andy
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