brake cable alum caps with aero brake levers?
Hey all - do you recommend putting brake cable caps at the brake lever side when cabling vintage (Dura Ace BL-7402) aero levers? Thanks!
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I always do in my 7402s. This is especially important if you run compressionless housing.
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Originally Posted by smd4
(Post 22560374)
I always do in my 7402s. This is especially important if you run compressionless housing.
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And I should say, if you do use compressionless housing, be sure to use the ferrules supplied by the housing manufacturer. Either way, I used the ferrules even when I was using the regular Dura Ace housing.
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Originally Posted by smd4
(Post 22560550)
And I should say, if you do use compressionless housing, be sure to use the ferrules supplied by the housing manufacturer. Either way, I used the ferrules even when I was using the regular Dura Ace housing.
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Originally Posted by tendency
(Post 22560623)
Yes I use modern Shimano branded compressionless .. I'll make sure to use the supplied caps, but why does that matter?
If it's constructed like other compressionless housing, the metal wires that make up the housing run parallel along the length of the housing--not in a tight spiral as in standard housing. Braking exerts a pretty large force on the housing. A lot of this force is directed at "pushing" the housing from the ends. If you don't use the proper ferules, these wires can "squeeze out" of the housing ends, thereby destroying the housing. The compressionless housing I've seen is wrapped in Kevlar to prevent the wires from bulging out of the housing along the length. |
I would not make a blanket claim about casing ferules and all Shimano brake systems. While, IIRC, the non aero systems do usually want a casing ferule at each end many of the aero cable routed versions don't want a ferule fir the casing as it enters the lever body and some adjuster barrels too. My general rule is if there's enough casing fit space use a ferule and if not don't. Andy
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Originally Posted by Andrew R Stewart
(Post 22560744)
While, IIRC, the non aero systems do usually want a casing ferule at each end many of the aero cable routed versions don't want a ferule fir the casing as it enters the lever body and some adjuster barrels too.
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Originally Posted by smd4
(Post 22560663)
Shimano makes compressionless brake housing? I was unaware of that.
If it's constructed like other compressionless housing, the metal wires that make up the housing run parallel along the length of the housing--not in a tight spiral as in standard housing. Braking exerts a pretty large force on the housing. A lot of this force is directed at "pushing" the housing from the ends. If you don't use the proper ferules, these wires can "squeeze out" of the housing ends, thereby destroying the housing. The compressionless housing I've seen is wrapped in Kevlar to prevent the wires from bulging out of the housing along the length. |
Originally Posted by Andrew R Stewart
(Post 22560744)
I would not make a blanket claim about casing ferules and all Shimano brake systems. While, IIRC, the non aero systems do usually want a casing ferule at each end many of the aero cable routed versions don't want a ferule fir the casing as it enters the lever body and some adjuster barrels too. My general rule is if there's enough casing fit space use a ferule and if not don't. Andy
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Originally Posted by tendency
(Post 22560810)
Hmmm, well, the vendor I purchased it from says it is compressionless however according to Shimano's site it looks like some sort of proprietary construct as it doesnt look like compression housing but not exactly like the compressionless ones I've seen.
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Originally Posted by Andrew R Stewart
(Post 22561023)
IIRC Shimano, at least at one time, called their brake casing compressionless because it used a spiral with a rectangular cross section, the flat sides will better support the compressive forces that a spiral made from oval or round section. Andy
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