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-   -   105 groupset Shift Cables (https://www.bikeforums.net/bicycle-mechanics/1299977-105-groupset-shift-cables.html)

SpedFast 09-12-24 09:48 AM


Originally Posted by Koyote (Post 23346713)
Are you referring to the little trapdoor on the underside of the shifter?

Yes.

prj71 09-12-24 10:08 AM


Originally Posted by choddo (Post 23346429)
Did you check under the hoods where the cable bends through 90°?

Yes. All is good.

maddog34 09-12-24 10:56 AM


Originally Posted by dedhed (Post 23346889)
Auto analogy - timing belts

alas... some have no clue what a timing belt is or does....and i certainly didn't want to explain why valves crashing into pistons would be a bad thing.
'91 Toyota Celica, 2 minutes from work, 2011... two bent valves.. My Rally Co-driver had bought the el-Cheapo parts kit several years earlier........ i made sure to late-brake several corners during the next TSD we competed in.. :D

i was actually considering using the VW Bug clutch cables as the analogy...

prj71 09-12-24 11:40 AM

You guys have answered my questions. I'll keep riding along until I notice a change in the shifting. If it breaks on a ride then it's just like riding a single speed. No big deal! :D

Koyote 09-12-24 12:02 PM


Originally Posted by prj71 (Post 23347137)
You guys have answered my questions. I'll keep riding along until I notice a change in the shifting. If it breaks on a ride then it's just like riding a single speed. No big deal! :D

Well, that certainly makes more sense than doing preventative maintenance that costs twelve bucks and 15 minutes.

dedhed 09-12-24 03:10 PM


Originally Posted by maddog34 (Post 23347100)
i was actually considering using the VW Bug clutch cables as the analogy...

I fondly? remember changing a bug clutch cable on the beach on South Padre Island, TX around 1980 on an epic road trip from WI. Digging in the sand underneath to reach things.

maddog34 09-12-24 03:45 PM


Originally Posted by dedhed (Post 23347296)
I fondly? remember changing a bug clutch cable on the beach on South Padre Island, TX around 1980 on an epic road trip from WI. Digging in the sand underneath to reach things.

the ones i've changed were towed to my house, and then i drove them into the driveway with the starter motor... i had a great rep with the local bug nuts in the late 80s,early 90s... my tune ups were described as "miracles" after i'd adjust the throttle cable correctly, along with the other standard.tune up items...many bugs had never actually had full throttle available, it seems...:foo:
then, the pinto herd discovered that i could replace their starters without pulling the engines.... they kinda hung out with the bug people, i guess....

as to this thread, it looks like the OP will have to hit himself in the head with a hammer to realize that it will hurt.
oh well, huh? we all tried.:50:

sch 09-12-24 04:12 PM

Having had shift cables break or fray inside a brifter 3x, twice on a tandem once on a single, the $7 cost for a stainless steel
cable and 20 minutes to change is small potatoes compared to 3 hours trying to fish out the broken off head of the cable
inside the brifter or the $50-100 a shop might charge. It only takes a single wire to fray and break to quadruple the amount
of time needed to make the change. A completely broken off head down inside the brifter is even worse, happened on
our tandem and the shop actually found two heads down inside the brifter. The R brifter will be 2-3x higher risk of failure
than the L. (I know this suggests we are slow learners.......)

biker222 09-12-24 05:18 PM

I have Ultegra 6800 shifters. First shift to small chain ring and smallest cog then I undo rear RD shifter hood from front and fold back towards handlebar until I see cable head. Then shift up to next cog check cable condition, shift to next cog each time checking cable. This allows for a simple quick check of the most common area of fraying.

I use Alligator slick cables with good success. Been getting 1.5-2 yrs (4-6K mi.) before replacing rear.

spclark 09-12-24 06:27 PM


Originally Posted by biker222 (Post 23347396)
I use Alligator slick cables with good success. Been getting 1.5-2 yrs (4-6K mi.) before replacing rear.

Thanks!

veganbikes 09-12-24 07:10 PM

I recommend replacing cables and housing with some frequency and while you are doing that you can replace your bar tape and make sure your bars aren't getting corroded with sweat. Plus good clean fresh cables and housing will improve shifting. At least every couple years it is a good thing unless the bike is rarely used and well stored but if you are riding them it is good to replacing things.

Kai Winters 09-12-24 07:26 PM


Originally Posted by spclark (Post 23346918)
Makes sense.

Something like this? But without the included housing, just the smooth-surface, pre-lubed cables?

What's the thinking about lubing uncoated cables where they ride around the grooved sheave quadrant inside the handle? Something that doesn't attract grime like a synthetic teflon grease or similar product that stays in place.

Just the 'coated' cable is my preference...but that may not count as I work in a bike shop and we get the cables and housings in bulk...they are either Jagwire or Clarks...both are high quality.

Kai Winters 09-12-24 07:30 PM


Originally Posted by dedhed (Post 23346936)
I usually grease up the head and first couple inches of the cable that are inside the shifter. Lubes the cable strands against each other and makes the head easier to remove in the future. without causing cold grease issues in the cold weather

If it works it works and chapeau.
Personally I've never 'lubed' a slick whip cable.
It's not the 'lubrication' or lack of that is causing the cable to break in the 'brifter'...gawd how i dislike that word lol...it's the sharpish angle and constant tension, lack of tension during the shift that wears and eventually breaks...when it does it can be a real b itch to extract it...I've spend nearly an hour on one once and cursed the customer's laziness every few minutes because a bit of preventative maintenance would have prevented it from occurring in the first place.

dedhed 09-12-24 08:07 PM

This was the first time when I changed from downtube shifters to 6600 STI. After that cables were an annual winter maintenance replacement.



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