Hey sram...

[glepore]

Why would you save basically no weight by using easily stripped ti (4mm) grub screws one of which is LEFT thread on your etap derailleurs. Known issue. Oh, so you can charge $40 retail for the screw kit that is out of stock everywhere? On a $400 derailleur ? Sheesh.

[Chris3g]

Yeah it’s annoying, I’ve kind of been casually looking for a front derailleur low limit screw for a while now, sram won’t send one and I can’t bring myself to pay $40 for 1 screw.

[glepore]

The low is easy, more or less as its at least right hand thread. A left thread grub screw is unicorn.

[NiFTY]

The bigger issue is the titanium axle on the inner plate versus steel retention screw. Axle gets eaten and cage pops off (sometimes into rear spokes - bye bye lightweights)

[MyM3Coupe]

The bigger issue is the titanium axle on the inner plate versus steel retention screw. Axle gets eaten and cage pops off (sometimes into rear spokes - bye bye lightweights)

Got to love SCAM quality. Lol.

[jih]

How are these easily stripped? If you're putting a lot of torque into a limit screw you're doing it wrong. It's not supposed to actually be tightened while it is resting on anything - it's a screw hanging in space.

The left/right threading is to maintain the clockwise-restricts-more, anticlockwise-restricts-less that everyone is used to in mech design.

[glepore]

Probably a combination of a slightly worn allen, the fact that it doesn't actually "limit" the cage like a traditional screw but actually moves it outboard to its setpoint and the fact that the end of travel isn't really clear. Some of it is user error, sure, but for those of us that don't see these regularly (I've got shop experience but not with etap) it's easy. And there is no appreciable weight savings here, just bragging rights. Its this difference probably between .2g and .15.

[Kurets]

Stripped is not synonymous with rounded off hex socket. Rounded of hex sockets happen when you use wrenches with sloppy tolerance compared to the socket. While the choice of a left hand thread is debatable, managing to round of the socket is poor choice of tools and heavy handedness, if it feels sloppy the tool won't work.

[TheKaiser]

Man, I thought SRAM was known for their awesome warranty and small parts dept, so even though their stuff failed more than Shimano or Campagnolo they at least took care of getting you replacements. This sounds like a real change of pace, which is especially crappy on their premier group.

[wheelbuilder]

I'm trying to figure out how it was rounded out to begin with? Was it being manipulated over and over, with a poor quality or wrong sized Hex? These don't take any force at all to manipulate, and I am struggling to understand what exactly happened? ...........details?

[commendatore]

Man, I thought SRAM was known for their awesome warranty and small parts dept, so even though their stuff failed more than Shimano or Campagnolo they at least took care of getting you replacements. This sounds like a real change of pace, which is especially crappy on their premier group.

If it is actually stripped... maybe. But if the head is rounded out, thats more user error.

The etap FD setup is a bit more fiddly, so I do have SOME sympathy.

[jih]

I'm trying to figure out how it was rounded out to begin with? Was it being manipulated over and over, with a poor quality or wrong sized Hex? These don't take any force at all to manipulate, and I am struggling to understand what exactly happened? ...........details?

Exactly. I haven't measured but I've turned these and I'd say they take roughly 1nm to turn. I'm pretty sure I don't have a torque wrench that can measure that low.

How do you round off a head, even a 2.5mm ti hex socket, while applying so little torque?

[darnellrm]

How do you round off a head, even a 2.5mm ti hex socket, while applying so little torque?

You try to adjust the screw when it is already against the stop and/or use a worn wrench.

[Shrike]

Softer material will wear out faster, appropriate fitting hex or not, and SRAM's FD does need a lot of adjustment. I had a hell of a time getting mine right. In the end I had to compromise, even guys in the best local LBS couldn't get it set up without compromise ie. Some rub in some ratios. Not even talking about extremes here.

Main problem I have with my eTap FD is that after half a dozen rides, it seems to need a touch up.

[glepore]

Yeah, its finicky, and mine hasn't been on the road yet. The setup, with the lines and such, doesn't account for parallax and old eyes. I have it spot on sorta, but if it needs adjustment later, and it sounds like it will, I'm screwed.

And yes, its probably my fault. But it wouldn't have happened without ti grubs that serve no purpose being ti. Off to SRAM support to supplicate.