Dura-Ace R9200

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Discodan
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by Discodan

never say never, but 200g seems like a huge step (he says with fingers crossed)

Maddie
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by Maddie

I don't think reducing weight was a priority on the new DA. And 200gr would be a lot considering that cassettes will be heavier than 11s. But Shimano also sticks to Alloy cranks instead of Carbon which is where the biggest potential weight loss would be. Derailleurs are already very light at 197 and 103g. XTR rotors yes, a bit lighter. But I just don't see where the 200g weight loss in total should be.
I would already be happy if the new 12s groupset weighs the same as 9170.

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henau212
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by henau212

Maddie wrote:
Mon Jul 26, 2021 12:21 pm
I don't think reducing weight was a priority on the new DA. And 200gr would be a lot considering that cassettes will be heavier than 11s. But Shimano also sticks to Alloy cranks instead of Carbon which is where the biggest potential weight loss would be. Derailleurs are already very light at 197 and 103g. XTR rotors yes, a bit lighter. But I just don't see where the 200g weight loss in total should be.
I would already be happy if the new 12s groupset weighs the same as 9170.
Maybe semi wireless will at least compensate some of the 12s extra weight.. But I also don't see any savings (especially not 200g).

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ryanw
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by ryanw

12 speed chain is circa 10g lighter and the rotors around 15g, so thats the extra gear negated.
Can't see 175g being saved anywhere else unless the entire cassette is Ti and the cranks have had some serious work on them to make lighter.
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ghostinthemachine
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by ghostinthemachine

Maddie wrote:
Mon Jul 26, 2021 12:21 pm
But Shimano also sticks to Alloy cranks instead of Carbon which is where the biggest potential weight loss would be.
Unlikely, shimano have quite rigorous targets for crank stiffness, going to carbon AND saving any significant weight would be difficult, unless they move away from the 24mm axle and gain some stiffness that way. Which is pretty unlikely.

BigBoyND
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by BigBoyND

pmprego wrote:
Mon Jul 26, 2021 10:15 am
And if true it would take the new DA to a new segment in itself. kind of like "ultegra 12spd" would compete with red axs and the DA 12spd would have no match at all with a price to match of course :)
Isn't that already the case? Red AXS is closer in weight to Ulltegra Di2 than DA

Also, where is 200g coming from all of a sudden? I remember 160g, and 20g of that from XTR rotors.

Edit:
- Another 10g from chain, now we are missing just 130g.
- DA cassette is pretty heavy. 11-30 is 211g, same as AXS 11-33. No reason it can't be 10-20g lighter.
- Campy Ekar calipers are 50g (!!!) lighter than DA
Last edited by BigBoyND on Mon Jul 26, 2021 2:31 pm, edited 1 time in total.

pmprego
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by pmprego

BigBoyND wrote:
Mon Jul 26, 2021 2:17 pm
pmprego wrote:
Mon Jul 26, 2021 10:15 am
And if true it would take the new DA to a new segment in itself. kind of like "ultegra 12spd" would compete with red axs and the DA 12spd would have no match at all with a price to match of course :)
Isn't that already the case? Red AXS is closer in weight to Ulltegra Di2 than DA

Also, where is 200g coming from all of a sudden? I remember 160g, and 20g of that from XTR rotors
Not for me for sure as i couldnt be further away from the people having inside info. But i do remember someone saying 200gr some pages ago. But there was also people prsenting the solution to the pandemic, the source of hunger in the planet and to climate change. Suck it world leaders!!

BigBoyND
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by BigBoyND

Are you talking about LRB23's post on page 332? They said 160g

pmprego
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by pmprego

BigBoyND wrote:
Mon Jul 26, 2021 2:38 pm
Are you talking about LRB23's post on page 332? They said 160g
I just followed someone saying the 200 number. Nonetheless, i think 160gr reduction still makes my argument true that DA would clearly be in a segment of itself in terms of weight.

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TerryDi2C
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by TerryDi2C

The manual was released on the FCC sites.. I've mirrored it here: https://assets.bettershifting.com/r9250 ... 6cc49d.pdf

If you want to read about my observations, visit https://bettershifting.com/dura-ace-r92 ... published/
;-)

bikewithnoname
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by bikewithnoname

Nice work Terry. Something concrete amidst the rampant speculation
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ms6073
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by ms6073

Nice. So with all the discussion about possible 160 gram (or is it ~200 gram :smartass:) weight reduction of the new group, what are the implications since we can no confirm the elimination of the junction A as well as and several pieces of the Di2 wiring?
- Michael
"People should stop expecting normal from me... seriously, we all know it's never going to happen"

Maddie
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by Maddie

Thanks for the writeup, Terry

illogict
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by illogict

TerryDi2C wrote:
Mon Jul 26, 2021 3:49 pm
The manual was released on the FCC sites.. I've mirrored it here: https://assets.bettershifting.com/r9250 ... 6cc49d.pdf

If you want to read about my observations, visit https://bettershifting.com/dura-ace-r92 ... published/
;-)
Thanks!
Interesting that they didn’t put a blinking red for low battery status (something like 1 to 10%).

by Weenie


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Alfus
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by Alfus

illogict wrote:
Mon Jul 26, 2021 4:30 pm

Interesting that they didn’t put a blinking red for low battery status (something like 1 to 10%).
You have red from 1% to 25%.

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