Ultegra 6800 brake feel

Discuss light weight issues concerning road bikes & parts.
mvcap
Posts: 68
Joined: Fri Apr 22, 2016 9:50 pm

by mvcap

This may be completely normal, I don't know, but my front brake levers are super smooth when I pull them. The rear lever has some resistance feel to it, nowhere near as smooth. Is this purely due to internal routing of the 2016 Specialized Tarmac? Or should the feel be the same no matter which lever is pulled?

by Weenie


huffington
Posts: 17
Joined: Sun Nov 29, 2015 3:29 pm

by huffington

Hey it's the same for me, with external routed cables. Maybe more cable, more ferrules on the rear means more friction?

tilf
Posts: 36
Joined: Sat Jan 21, 2017 10:56 am

by tilf

What cable/housing are you running? That matters more than whether internal or external.

Allen254
Posts: 141
Joined: Sun Feb 07, 2016 3:05 am

by Allen254

mvcap wrote:This may be completely normal, I don't know, but my front brake levers are super smooth when I pull them. The rear lever has some resistance feel to it, nowhere near as smooth. Is this purely due to internal routing of the 2016 Specialized Tarmac? Or should the feel be the same no matter which lever is pulled?

I had the same thing on my 6800s idk why that is I think they may for that on purpose but idk I switched to TRP brakes.

tarmackev
Posts: 218
Joined: Sat Jan 15, 2011 9:59 pm

by tarmackev

More cable inner and outer = more friction.


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mvcap
Posts: 68
Joined: Fri Apr 22, 2016 9:50 pm

by mvcap

Makes sense on more cable, ferrules, etc. This is just the stock housing from Specialized. Thanks for weighing in, I appreciate it!

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mpulsiv
Posts: 1021
Joined: Mon Mar 24, 2014 9:17 pm

by mpulsiv

Did you build this bike or are you using the brake cables and housing that came with a bike? Have you looked at Dura Ace polymer-coated cable set?
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mvcap
Posts: 68
Joined: Fri Apr 22, 2016 9:50 pm

by mvcap

Didn't build, all stock. Haven't tried DA cables, you recommend them to alleviate this?

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mpulsiv
Posts: 1021
Joined: Mon Mar 24, 2014 9:17 pm

by mpulsiv

You can start with basic troubleshooting. Pull cables and housing and run it externally for testing purposes. Ride around for few minutes. If the brake feel doesn't change then upgrade to polymer-coated housing and cable.
Racing is a three-dimensional high-speed chess game, involving hundreds of pieces on the board.

:arrow: CBA = Chronic Bike Addiction
:arrow: OCD = Obsessive Cycling Disorder

mvcap
Posts: 68
Joined: Fri Apr 22, 2016 9:50 pm

by mvcap

Thx mpulsiv!

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rcb78
Posts: 54
Joined: Sun Mar 02, 2014 6:17 pm

by rcb78

A little more drag is normal for the longer cable, but it should be just as smooth, at least my Tarmac is. Make sure you're using nosed ferrules at the cable stops where it passes through the frame, they make a difference. Also, a light smear of Shimano's cable specific grease at the point the cables bend under the bars helps too.

mvcap
Posts: 68
Joined: Fri Apr 22, 2016 9:50 pm

by mvcap

rcb78 wrote:A little more drag is normal for the longer cable, but it should be just as smooth, at least my Tarmac is. Make sure you're using nosed ferrules at the cable stops where it passes through the frame, they make a difference. Also, a light smear of Shimano's cable specific grease at the point the cables bend under the bars helps too.

Thanks for this, it just has more of a grindy/grit/rough feel to it so maybe the grease would help as well.

rcb78
Posts: 54
Joined: Sun Mar 02, 2014 6:17 pm

by rcb78

The 'grit' feeling is almost always the individual strands of cable rubbing across either a ferrule, poorly cut housing end, or something along those lines. You just need to track down the offending bit and correct it.

Nefarious86
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by Nefarious86

Sorry mpulsiv but those coated Shimano cables are crap. The coating flakes off and gunks up the outers, simple stainless with slick honey is much more reliable.

Image
This was from simply removing a brand new cable out of a liner on a set of pre cabled bars/shifters before assembling a bike.
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by Weenie


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mpulsiv
Posts: 1021
Joined: Mon Mar 24, 2014 9:17 pm

by mpulsiv

Nefarious86 wrote:Sorry mpulsiv but those coated Shimano cables are crap. The coating flakes off and gunks up the outers, simple stainless with slick honey is much more reliable.

Image
This was from simply removing a brand new cable out of a liner on a set of pre cabled bars/shifters before assembling a bike.


I'm not promoting any cables/housings. Which Shimano cables are those? What's the Shimano part #? They make standard, PTFE and Polymer.
Racing is a three-dimensional high-speed chess game, involving hundreds of pieces on the board.

:arrow: CBA = Chronic Bike Addiction
:arrow: OCD = Obsessive Cycling Disorder

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