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Sayonara to road bike?
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dan emery
Joined: 11 Jan 2004
Posts: 6308
Location: Maine

7/9/19 2:59 PM

Yawda yawda yawda

I have no idea what Yaw even is (donít explain it I donít want to know) and no knowledge of the general experience with etap front derailleurs. Mine has worked very well in the etap system. But then I really never have problems with front shifting.

To me mixing drivetrain components just introduces a level of complexity and uncertainty which I donít need to introduce.

If I avoided a problem by not mixing a different crank with etap derailleurs, that just illustrates that even a broken clock is right twice a day.

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Sparky
Joined: 08 Dec 2003
Posts: 17541
Location: Portland, OR

7/9/19 4:02 PM

Can't explain as I really do not know beyond what I read and said here. Yaw is SRAMs way to revolutionize front shifting I believe. It is so well designed, to do so it includes a chain drop device. ;)

Mixing, not mixing? As long shit works I got no problem going out of spec and/or mixing groups and even brands.

I think orig cabled Red is Yaw, eTap.. dunno. My total eTap experience is your bike ;)

Funny though, when I tried double tap in 2012 I said no way I can use that. Once my elbow wear/age caught up with me and swinging a brake lever to shift caused tendon issues...

Now I think I'd like it. But have already replaced that style SH swing shifting with ERGOs.

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henoch
Joined: 12 Jan 2004
Posts: 1663

7/9/19 9:12 PM

Ask Bauke Mollenma how he feels about the tap front drauiluer :)

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Brian Nystrom
Joined: 26 Jan 2004
Posts: 4548
Location: Nashua, NH

7/10/19 10:04 AM

Yaw is pretty simple. All it means is that in addition to the front derailleur moving inward and outward, the angle of the cage also changes to eliminate chain rub on the cage in the big-big and little-little gear combinations. That's it.

I wasn't aware of the issues with the Etap front derailleur.

Mollema had issues with the new AXS system, but it wasn't clear to me which derailleur was the problem (I thought it was the rear).

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greglepore
Joined: 10 Jan 2004
Posts: 1673
Location: SE Pa, USA

7/10/19 1:33 PM

On top of that, the bloody high limit screw is a) reverse thread and b) ti and c) strips easily. Mine did. Luckily its where it needs to be, but its a $300 problem if ever I want to move it . Freaking head scratcher.

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Nick Payne
Joined: 10 Jan 2004
Posts: 2453
Location: Canberra, Australia

7/11/19 12:43 AM


quote:
How much top end gearing do you think you need? A 46/30 crank with an 11 in the rear still provides a pretty good-sized top gear (113").

On my Open, shod with Compass 700x35 tyres, I have 42/29 rings with an 11-34 cassette. The 42-11 is good for a bit over 50kph, and outside of road racing, I can't see any need for a bigger gear. 29-34 has got me up anything I've aimed it at so far, including some pretty steep off-road singletrack.

As for the Red eTap FD, once I had it adjusted properly, I've haven't had a chain drop in many months, and I'm not using either a SRAM crank or chainrings. Crank is a Middleburn with 94BCD spider, and the chainrings are NOS Shimano (outer) and Gebhardt (inner).

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April
Joined: 13 Dec 2003
Posts: 6592
Location: Westchester/NYC

7/11/19 5:39 AM

ďI've haven't had a chain drop in many monthsĒ

Thatís a pretty low standard, is it not? Iíve not had a chain drop more than once every few YEARS!

Or did you only had the setup for a few months so far?

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Brian Nystrom
Joined: 26 Jan 2004
Posts: 4548
Location: Nashua, NH

7/11/19 7:57 AM


quote:
Thatís a pretty low standard, is it not?


That depends on what kind of riding you're doing. While I rarely ever have a chain drop or overshift on a road bike, drops happen off-pavement with some regularity. In fact, I just modified the chain watcher on my gravel bike a couple of days ago to try to reduce drops (I added support between the frame and the bottom of the arm to reduce flexing).

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April
Joined: 13 Dec 2003
Posts: 6592
Location: Westchester/NYC

7/11/19 2:49 PM

I guess I didn't have that happened on my gravel bike.

Back when I used to mtn bike, I noticed the chain sometimes jump off the small ring when it's in the small end of the cog set. Not quite a small-small combo but just a lot of chain slack. The derailleur didn't seem to have enough tension to "hold" the chain tight. But other than that, I rarely drop my chains.

(I'm talking 9 speeds though. Not sure if 10-11 maybe more finicky?)

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Sparky
Joined: 08 Dec 2003
Posts: 17541
Location: Portland, OR

7/11/19 5:22 PM

They make rear DR with clutches in them since after 9 speed, maybe after 10s.

And then of course there it the single front chainring with the narrow/tall teeth. I think a lot of this is the child process of downhill where the chain really bounces, and then some.

I can say back in the day of FS and rock garden blasting I intentionally would choose a gear with the most teeth in play rather than not. Hopefully not too cross chained.

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