On Wednesday, February 19, 2020 at 4:49:49 PM UTC, Tom Kunich wrote:
On Monday, February 17, 2020 at 5:04:39 PM UTC-8, John B. wrote:
On Mon, 17 Feb 2020 07:14:43 -0800 (PST), Tom Kunich
wrote:

On Saturday, February 15, 2020 at 9:30:11 AM UTC-8, Andre Jute wrote:
"Effects of Lateral Chain Misalignment (Cross-Chaining) on Drivetrain Efficiency & Effects of Chainring Size on Drivetrain Efficiency" at
https://www.ceramicspeed.com/media/3...ize-report.pdf
has persuaded me that I will not be buying a 12- or 11-speed group! Nor 10-speed, nor even 9-speed.

Andre Jute
My Rohloff Speed 14 chainline is straight

I can't find the testing now but Connex did some tests of their 11 speed chains and had almost no losses from full cross chained to straight chains. Over the years they have developed the science of chains so well that they are so flexible that you simply don't get much in the way of loses.

This is proven by their wear tests as well since the wear test includes pushing the chains all of the way from one extreme to the other. https://bikerumor-wpengine.netdna-ss...st-results.jpg


You didn't read the test. It did not include cross chaining as you
say. See:
https://www.connexchain.com/en/tests...ance-test.html

If you had read the frigging test you would have (if you can
comprehend what you read) seen that the test used:

drive train
front chain ring: 52 teeth
back sprocket: 17 teeth
test chain: 63 links
reference chain: 63 links

Or in simple terms, that you might understand, one sprocket in the
front and one in the back. No cross chaining whatsoever.

--
cheers,

John B.

That must be why the magazine description of the testing said that the chains were moved from 3" in one direction and then 3" in the other. Funny thing how actually watching the tests done seems to show things that might not otherwise be mentioned. But I'm sure that you know much more than the people who actually attended the testing. Just like Frank knows a great deal more about the height of tree limbs above the bike lane than someone that was actually struck by the limb. Between the two of you, you lick the platter clean don't you?

That dog wants it's platter back, and its food too! -- AJ