Dura-Ace R9200

[spdntrxi]

I'm confused. Everyone was in agreement that SRAM AXS flat top chains and Force cassettes (& Red to a slightly lesser extent) were the noisiest drivetrain ever. But now DA & Ultegra are?

No one said that 9100 DA and 8000 Ultegra is noisier than Sram 12s. We all have different perception of what noise is. Good friend of mine swears he doesn't hear anything from his 12s Force cassette. But I find it horribly loud...

I've ridden with about 6 guys with 12s force. 5 are loud, but one of my buddies just got a Scott addict SE and it's super quiet.

[Tonytony]

My experience is that the red axs is very quiet, I only hear my wheels 'cutting' through the wind. The force is loud, but it depends on which gear, 14t is the loudest with my cassette.

[Tonytony]

My outer chainring was pretty loud and the inner was quiet with shimano r8000

[bedampft]

Shimano drivetrains are louder, R8000 and R9100 especially, more to do with chain cassette. A 12 spd XTR chain can quite things down a bit, I don’t think the chainrings have anything to do with that.

Yes, easiest way to quiten things down is XT or XTR 12 speed chain and changing at least the upper pulley to the older style RD-9000.

IMHO, the shifting on a RD9150 with a 9000 upper pulley is less crisp and also slower compared to the 9100 pulley, even with a 12s chain. I went back to the conventional 9100 pulleys because of that. But I agree, my old 9070 groupset was more silent than my 9150.

That is also true. But on the topic of noise, it helps.
But since I couldn't source the 9150 for a few months now, I had to use the 9000.

Why do you need to change the upper pulley?

You don't need to
But the teeth on the R91XX are longer, as the ones on the 9000 Series. Shifting is more crisp this way, but also a bit noisier

[pdlpsher1]

My buddy rides with Sram Force AXS with a Force cassette. His cassette is loud when the chain is in the middle of the cassette. When he's climbing (either on the big or small ring) it's not as bad as when he's riding on the flats. As for my Dura Ace it's wickedly loud when I cross-chain on the big ring. When I'm cruising on the flats it's quiet. When I'm in the small ring it's quiet no matter the position of the chain on the cassette. The hollow big ring is to blame. Sram's issue is with the Force cassette.

[Ritxis]

New Patents Applications

they are 3 similar (ST-RXXX...??) ....new shapes are seen, for rim and disc brakes, with batteries and more things...............

Those of you who speak English, take a look and comment on what you see curious and / or novel

https://drive.google.com/file/d/1iDapFW ... sp=sharing

https://drive.google.com/file/d/14xl9Nh ... sp=sharing

https://drive.google.com/file/d/1i3RnM- ... sp=sharing

[JAQ1]

From those Patents it would seem that there are a few options in housing the 2032 battery and the brains in the shifter. It would appear that they are strugling to get a solution that would keep the small form factor of the Di2 shifter. There are also rim brake variants shown.

If you wondered why Sram keeps having a larger buldge for the hydraulic brakes in their shifter, they have to put the brains, antennas and battery somewhere.

[RDY]

From those Patents it would seem that there are a few options in housing the 2032 battery and the brains in the shifter. It would appear that they are strugling to get a solution that would keep the small form factor of the Di2 shifter. There are also rim brake variants shown.

If you wondered why Sram keeps having a larger buldge for the hydraulic brakes in their shifter, they have to put the brains, antennas and battery somewhere.

Antennas and wireless boards are minute. It was just a design choice by SRAM. Rival AXS brifters are smaller than Shimano - I would expect Red & Force to go in that direction when refreshed in a year or two, given how well they've been received.

[Dov]

How long before a release of something does the patent application happen? What does this tell us about when it may arrive in our bike shops?

[Ritxis]

How long before a release of something does the patent application happen? What does this tell us about when it may arrive in our bike shops?

They are patents, it does not mean that what is seen in them always applies to finished products.......but in these patents the drawings are already very elaborated and there will be things that are seen when they present the novelties

[Stendhal]

New Patents Applications

they are 3 similar (ST-RXXX...??) ....new shapes are seen, for rim and disc brakes, with batteries and more things...............

Those of you who speak English, take a look and comment on what you see curious and / or novel

https://drive.google.com/file/d/1iDapFW ... sp=sharing

https://drive.google.com/file/d/14xl9Nh ... sp=sharing

https://drive.google.com/file/d/1i3RnM- ... sp=sharing

road.cc is reporting that new Shimano patent applications signal a semi-wireless 12 speed system. Semi-wireless means the shifters communicate electronically without wires, but the two derailleurs are connected by wires.

[Ritxis]

New Patents Applications

they are 3 similar (ST-RXXX...??) ....new shapes are seen, for rim and disc brakes, with batteries and more things...............

Those of you who speak English, take a look and comment on what you see curious and / or novel

https://drive.google.com/file/d/1iDapFW ... sp=sharing

https://drive.google.com/file/d/14xl9Nh ... sp=sharing

https://drive.google.com/file/d/1i3RnM- ... sp=sharing

road.cc is reporting that new Shimano patent applications signal a semi-wireless 12 speed system. Semi-wireless means the shifters communicate electronically without wires, but the two derailleurs are connected by wires.

I got ahead of Road.cc ......................

They have only put an image of the new patents, the others are of older patents.....These new ones clarify (or so it seems) how future shifters can be

[RDY]

Those are very detailed patent documents. I don't think they'd go to that kind of trouble for something that wasn't an actual product.

[LainOTN]

New Patents Applications

they are 3 similar (ST-RXXX...??) ....new shapes are seen, for rim and disc brakes, with batteries and more things...............

Those of you who speak English, take a look and comment on what you see curious and / or novel

https://drive.google.com/file/d/1iDapFW ... sp=sharing

https://drive.google.com/file/d/14xl9Nh ... sp=sharing

https://drive.google.com/file/d/1i3RnM- ... sp=sharing

If this is close to the final product I can say thanks Shimano for givin user choice. Semiwireless or wired choose your flavour.

[pdlpsher1]

So what does this mean? Will Dura Ace have piezo switches as mentioned earlier in this thread or the more traditional coin cell battery? These newly released patents don't necessarily mean the production units will use coin cells. It could also be possible that the Dura Ace will use piezo while the Ultegra will have coin cells. That might be a way for Shimano to differentiate the two groupsets. The piezo shifters might be a tiny bit lighter and smaller than the non-piezo ones.