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BILL S

Guru
Location
London
It's easier than that.
Get a long tube with two bungs with holes in just big enough to feed the new cable through.
In one of the bungs you will need another hole that can be be bunged with another 5 mm bung
Thread the new cable through the one bung and into the tube.
The thread it though other bung and insert the bung into the end of the tube.
Your tube should be long enough so you now only have 10mm of inner poking through the second bung.
Pull it tight and secure it with an old fashioned brake cable bolt, the type where the bolt has a hole in it.
Now your new inner cable is stretched straight in the tube fill the tube with liquid nitrogen using a funnel and the 5mm hole.
Then bung the hole for a couple of minutes.
Now poor out the liquid nitrogen and remove the now more rigid inner cable which in its more rigid state should thread neatly down the bike frame.

Simple!
I like it AAAC and I'd consider it but I no longer have the respect for liquid nitrogen that I used to. I used to think that no living thing could survive contact with liquid nitrogen but in Terminator 2 the terminator was engulfed in liquid nitrogen and smashed into thousands of pieces but he still survived it once the liquid nitrogen had dissipated. I was absolutely gutted and swore I'd never use the stuff again. Anyway I've got no liquid nitrogen left in the shed so not really prepared to get some more in even to carry out such an important operation. I ended up trying to pull some thread through the frame with the old cable which worked to a point but the cable was in such a bad frayed state that I only got it half way to just under the bottom bracket where there was a nice hole to pull it through. I have no idea how my gears were working at all considering how the cable came out. Even a thin tube like Rob's suggestion would never have slid over that cable. But anyway the job went really well and I now have gears running better than I ever remember them. The gears must have got slowly bad over time so I didn't notice just how bad they had got in trying to change gear. Can't wait to try it out now. Maybe tomorrow on SC or CG :smile:
 

AAAC 76C

Large Member
Location
LIVING THE DREAM
I like it AAAC and I'd consider it but I no longer have the respect for liquid nitrogen that I used to. I used to think that no living thing could survive contact with liquid nitrogen but in Terminator 2 the terminator was engulfed in liquid nitrogen and smashed into thousands of pieces but he still survived it once the liquid nitrogen had dissipated. I was absolutely gutted and swore I'd never use the stuff again. Anyway I've got no liquid nitrogen left in the shed so not really prepared to get some more in even to carry out such an important operation. I ended up trying to pull some thread through the frame with the old cable which worked to a point but the cable was in such a bad frayed state that I only got it half way to just under the bottom bracket where there was a nice hole to pull it through. I have no idea how my gears were working at all considering how the cable came out. Even a thin tube like Rob's suggestion would never have slid over that cable. But anyway the job went really well and I now have gears running better than I ever remember them. The gears must have got slowly bad over time so I didn't notice just how bad they had got in trying to change gear. Can't wait to try it out now. Maybe tomorrow on SC or CG :smile:

I know what you mean which is why I mentioned the brifter end failure.
That's where mine last went.Not only would the cable have become more 'elastic'as the individual wire broke but the broken ends were probably making the movement less positive but as it happened so slowly you did not notice it and it all felt 'normal' until eventual failure.
 

BILL S

Guru
Location
London
I know what you mean which is why I mentioned the brifter end failure.
That's where mine last went.Not only would the cable have become more 'elastic'as the individual wire broke but the broken ends were probably making the movement less positive but as it happened so slowly you did not notice it and it all felt 'normal' until eventual failure.
YouTube can be fantastic for these things. Last time I was clueless about modern mechanisms like Ultegra gear changers and how the cable threaded though. Previously I'd only changed them out in mountain bikes which are totally different but also a complete bu66er especially the sram ones. This time a quick bit of youtubeing showed me exactly how and where to get to the cable nipple :blush: so instead of being the hardest part of the job like last time, this time it was the easiest. I reckon a straight bit of wire would be good for threading through the frame. The thread and superglue worked well for me this time though.
 

AAAC 76C

Large Member
Location
LIVING THE DREAM
YouTube can be fantastic for these things. Last time I was clueless about modern mechanisms like Ultegra gear changers and how the cable threaded though. Previously I'd only changed them out in mountain bikes which are totally different but also a complete bu66er especially the sram ones. This time a quick bit of youtubeing showed me exactly how and where to get to the cable nipple :blush: so instead of being the hardest part of the job like last time, this time it was the easiest. I reckon a straight bit of wire would be good for threading through the frame. The thread and superglue worked well for me this time though.

They all work pretty much the same way ever since the indexed down tube changer.
The all have a drum with hole that the cable nipple locks in and a ratchet type system for the indexing so you just have to work out where the drum hole lines up with the cable insertion hole, easier said than done sometimes, or like on MTB shifters you have to remove an access plate.
With brifters the ratcheting mechanism is very delicate and quite complex and best left well, particularly with Shimano, and all of the access is hidden under the hood.
To some degree the new electronic wireless systems are the most simple and with some work BSim could even change gear for you.
I expect that will be one of the next upgrades they make, well ahead of actually making the simulator 'simulate'.
 

theboxers

TheBoxers on Cycle Sim sw
Woo hoo ... back onto page one of the SC :laugh: Up to 21st. Loads of Cycle Chatters on page 1 of the GC now :cheers:
Currently @115 with 5 stages done. Maybe a top 100 with 6 :unsure:
 

BILL S

Guru
Location
London
It's San Andres Isla and Wolfie and Boxers have kindly provided their ghosts for extra motivation. :hyper:
If you're undecided about whether to do it, please help make up the numbers and don't be a :girldance:
 
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