What gear where you in on the 11-32 when it came off? Did it come off to the inside or outside of the chain ring?

I'd check the old chain for stiff links just to put your mind at rest. As someone else said the most likely one is the power link and if that was stiff you probably won't know now if that is how you took it apart.

I am vindicated and smug now. Goes to show that the called Slowtwitch "experts" in this thread have no idea how to apply theoretical calculations to reality and the science is about explaining what happens in the real world, not forcing the real world to follow flawed "expert" assumptions and calculations so that it conforms to false idioms.

thank you for bringing the data..

didn't know the FD was so expensive in aero money.. hmm..

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"It is a good feeling for old men who have begun to fear failure, any sort of failure, to set a schedule for exercise and stick to it. If an aging man can run a distance of three miles, for instance, he knows that whatever his other failures may be, he is not completely wasted away." Romain Gary, SI interview

Are you smug because you estimated it was 10W worse for 1x and some tests figured it was a wash? Aero didn't figure in your op or the video. If the two setups are even on aero that does not make people running 1x fools - that was your statement and I can't see how anyone would consider that was vindicated.

I was just pointing out even though I think 2X is best for me I can still see how 1X might work for some people and situations.

I could get away with a 1X for TT's but then I would need to change back to 2X for Triathlon. On the other hand I am moving away from triathlon and it would be nice to get rid of one of those stupid shift cables hanging in the wind.

No, I am vindicated and smug because one of the others posted saying a front derailleur hanger has way more drag than the entire downtube of a bike and that 1X is so much more aero than 2X just by getting rid of the FD hanger. I said that was stupid and not believable, not even common sense. He said it's because the FD hanger is a flat plate and he can prove his erroneous assertions with fancy calculations. I said it's actually curved with a big hole in it and is sheltered by the downtube. And now someone posted that they tested this exact thing in the wind tunnel and I am totally right. Goes to show that we need more common sense and less "experts" giving laughable assertions.

That's because it isn't. He gave you wrong information. The wind tunnel test the other poster posted about shows he is totally wrong about the stage of a FD.

Heath, I don't suppose you ever tested anyone who used 1x to narrow Q factor?

Count me in as another MTB/TT 1x idiot like Shinny.

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Amateur recreational hobbyist cyclist
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Strange that a random post that supports your assertion is immediately valid and doesn't require quite the same level of proof you were demanding from Rappstar.

That's because the claim that Rappstar made about a tiny, sheltered 2X FD hanger having more drag than an entire downtube is outright non-sensical, illogical, and outlandish. He made such an obviously wrong and unbelievable claim that it is right to push him to provide evidence.

Well...it might be because we're starting to see bikes designed to ONLY allow for 1X (see 3T Strada), and some might be worrying it's the next "road disc brake" or "thru axle" type push that although in the short term increases choice, eventually decreases choice (see "26 inch MTB wheels/tires")...whereas on the opposite side, there's a need to rationalize the choice made.

I think about 1X drivetrains like I think about non-round chainrings: If it feels good to you, have at it.

Just don't ascribe "magical" properties to your choice ;-)

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http://bikeblather.blogspot.com/

Part of the frustration of the 1x zealots (like me) is that we have ridden both 2x and 1x (and 3x), while the anti-1x crew points to gear calculators and how they think they would feel.

Same reason I can't weigh in on disc brakes for road bikes. I have never tried them so I can't make an educated statement about them.

I have no more front derailleurs on my bikes and I know what I give up for the simplicity and enjoyment - top-end range and smaller jumps - but to me it is worth it.

If I was a road racer, you can bet that where I live, my race bike would be a 2x.

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/kj

http://kjmcawesome.tumblr.com/

I gave my only 1X set up rig to my son to use as a college campus beater. It worked great for my flat commute ;-)

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http://bikeblather.blogspot.com/

BTW, I'm pretty "agnostic" on the subject.

I'm not super-sensitive to larger jumps between gears (as evidenced by my 8-speed setup with a 12-30 cassette, and my "all-road" bike with a 10sp 11-42 cassette)...but, on the other hand, ALL of my bikes have front derailleurs and I have ZERO issues with them nor dropped chains...

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http://bikeblather.blogspot.com/

Check that your free wheel coasts smoothly. A loss of chain tension along the top will throw a 1x chain pretty easy. I had a little rub between my disc and cassette and it took a bit to figure out the problem. Your freewheel needs to be "free"

Nothing that specific. Tested a track setup but even that has a pretty standard Q. Someone would have to modify a crank and compare it to a standard one. The wrenching would eat up a lot of tunnel time.

I know back in the early 00's Trek produced a bike with a special narrow BB that tested faster at LSWT. Walser also produced one and several track bikes used in the olympics. That's about the only known data points I have.

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Heath Dotson
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WRONG!

I was roughly in 14 or so, on a flat road having just finished a threshold effort. The chain came off to the outside of the chainring. The chain seems fine, nothing stiff at all. It's a connex wipperman chain

I think a TT bike could be perfect for a 1x. A TT bike is essentially a track bike with gears. A track bike is a fixie, so a single chain ring.

For most nearly all TT's and Ironmans I see no need for anyone to ever get out of a compact 50 big ring while running a fairly standard 11-28.

For a dual-duty proper road bike that gets fitted with TT bars on occasion, stick with the double ring. If you're a TRUE road rider, at some point you're going to sprint faster than some 1x setup will allow AND you'll grind slower up a hill than a 1x setup with 11-28 will do.

I've put TT bars on my Propel and I've also taken on some Cat III and up to HC climbs also. Good luck on an HC climb with a 1x that has any flat-speed capability.

spot on!! imagine that...someone has a preconceived idea/conclusion about something and as soon as they see some information to support it, that say "that's is...see I told you" while discounting any information to the contrary.

Because your audience isn't just him...others appreciate your thoughts/time... always remember that

You might be right. A post last year described a ST'er testing either a QR cd01 or illicito as 2x and 1x, and found the 1x was slower by the equivalent of 3-4 watts. I was really surprised (and disappointed!).

When you put it like that...

But no. I think you and many others missed the point of the original statement, which was made by someone who has clearly been around here a long time and is now posting under a new handle pretending to be dumb. The OP was written to stir up the 1x mafia and inflame their emotions about the great drivetrain debate of our time. And stir up/inflame it did. It was a pretty solid troll and indictment of a movement that has taken on more dogma than it, in my opinion, should.

I think you're reaching on this one. The analog you should draw is to the demise of the mountain bike front derailleur, which actually seems to have been a consumer-demand driven phenomenon that won out on the merits of the product offering, not by the push of industry. Choice was not diminished. SRAM bet on the XD driver with a 10T cog going up to 42T and Shimano bet on Synchroshift di2 tech. We know who won that one.

There is one bike out there that doesn't have a mount for an FD hanger, but that also seems to be part of a specific strategy to shift the 1x paradigm to 12 speed or 13 speed drive train via a unicorn freehub body. The bet from 3T seems to be that a 10T with 12 and 13 speeds is the tipping point for 1x to go from a niche use case to widespread adoption, and putting these eggs in the XDR basket without larger industry players on board seems tantamount to Specialized's experimentation of the 135mm thru axle standard in the 2016 cx frames.

I'm not betting against 3T either, even though it's a ballsy move to be a first mover here. But in general, regarding the Strada and the removal of the FD hanger -- this was their logic:


I call bullshit. I want to see the test rig that determined that the front derailleur was pushing all that air around the legs, which is something different than rappstar is saying in this thread. Or are we in CFD la la land at this point? This goes back to what Heath was saying about how there's all this turbulent air down there, which probably renders any test data without pedaling legs next to useless.

The only way it makes sense to remove the FD hanger on new gen aero bikes is to actually prove the above point (as relayed by Bikerumor) and to convince 2x-inclined consumers of it. Otherwise as a manufacturer, you eliminate choice and by extension reduce your potential customer base, which just won't make sense for most companies.