Weight Weenies

Is there going to be a CS-9001? I'm sure you all remember this thread Dura Ace 9000 11 speed cassette- rubish product design.

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Seems like Shimano have realised the problem but no sign of a recall/ replacement scheme

Yea, that's disappointing.

ST-9001 VS ST-9000

ST-6800 VS ST-9001

Svetty wrote:Seems like Shimano have realised the problem but no sign of a recall/ replacement scheme

Same with the 7900 and 7901 chains (removal of quicklink)

Aside from the slight ergonomic reworking, the main thing I see here is the cable guide thingy, which was what I initially thought was causing the hassle in the first place.

So, any chance you can post a picture of the other side of the cable guide thingy, so we can have a look at the part which touches the cable.

It was my thoughts from the beginning that the 'fin' element of the 9000 cable guide thingy, that presses into the body of the shifter, would be constantly in contact with the cable and causing wear.

Show us the other side of the 9001 cable guide thingy, and maybe we can modify the ones we have on our 9000s to match.

Alternatively, I was considering just taking it out completely and running it without. Has anyone tried that?

Cheers

When are the 9001 shifters supposed to hit the UK vendors??

The new Shimano Poly cables have much less friction than their PTFE 7900 cables, as well as most any other shift cables.

The coating doesn't bunch up like it does on other coated cables, so it remains very slick for a long time.

Last year I was at a Park Tool Summit Clinic and they had 4 Orca's built with 9000 DA, only difference being the cables, and no mechanic there doubted the overwhelming lack of friction on the bike with 9000 cables.

Anyone have 9001s they can photo to show revised cable guide as per OwenJames' post above?

Admittedly I've only been on the system for three months, but the polymer cables and appropriate housing run through Ultegra 6800 shifters and derailleurs has been working brilliantly for me. Much lower friction and zero issues. The polymer itself does get scuffed up at the ends if you aren't careful, but has had no appreciable difference on shift quality.

Does this apply to Di2 and those shifters on the 9070? Haven't heard this issue with those.

Zigmeister wrote:Does this apply to Di2 and those shifters on the 9070? Haven't heard this issue with those.

LOLWOT?

Let's think about this for a second; the Dura Ace 9000 cables are snapping due to a cable routing issue putting excessive stress on the bend which sits inside the shifter, which causes grossly accelerated wear.

Di2 uses electronic cables to send an electronic signal from the shifter to the front / rear mech. The electrical cable does not move, and is not subject to any friction / stress as part of the standard operation.

So no, LOL, this does not affect Di2.

If the electrons have to make a sharp turn in the cable that might lead to localized heating and cable failure.

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Question for you guys.

Any functional/tactile differences between 6800 and 9001 shifters?

Asking because I recently upgrade my components from 6800 to 9000 (going to put the 6800 components on the TT bike). Didnt buy the shifters yet though. Ignoring price, cable snapping and weight, are the 9001 shifters better than the 6800 shifters in any way?