Dura-Ace R9200

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Campyforever
Posts: 106
Joined: Sun Nov 06, 2022 1:32 pm

by Campyforever

spdntrxi wrote:
Sun Jan 01, 2023 2:33 am
Campyforever wrote:
Sun Jan 01, 2023 2:14 am
It still would be nice to able to lock-out the big/big combo?
I love big big
I was always taught to avoid it...No?

spdntrxi
Posts: 5789
Joined: Sat Jul 20, 2013 6:11 pm

by spdntrxi

Campyforever wrote:
Sun Jan 01, 2023 3:18 am
spdntrxi wrote:
Sun Jan 01, 2023 2:33 am
Campyforever wrote:
Sun Jan 01, 2023 2:14 am
It still would be nice to able to lock-out the big/big combo?
I love big big
I was always taught to avoid it...No?
yeah I avoid it for the most part and wont stay for extended periods, but I try to setup my bike where it's usable... I'd much rather stay in the big ring if possible.
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robertbb
Posts: 2179
Joined: Thu Jul 23, 2009 3:35 am

by robertbb

TobinHatesYou wrote:
Sat Dec 31, 2022 11:08 pm
Campyforever wrote:
Sat Dec 31, 2022 10:00 pm
yes, that was a typo

thanks! So this is by design?

I wish I could get it to happen on the other side as well
Meaning: no big+big....

Am i the only one who did not realize this was by design?
God, I could have torn my hair out....

Shifting into big-big is preferred to dropping into the small ring for very short, punchy ramps IMO, especially in a race scenario. When you shift up front you are making two big jumps and losing momentum in both shift directions... even if you are performing a very quick compensation "synchro shift."

On the other hand it pretty much never makes sense to be in small-small combos.
For this reason, I'm starting to love my 1x setup more and more. In late 2021 I moved to and now ride in an area that's either up or down (with gradients above 5%) in every direction but nothing sustained for more than 40-60sec. There's barely a flat road around. In these situations a 2x is frankly an annoyance and results in waaaay too much front shifting (and compo shifts in the rear).

BigBoyND
Posts: 1347
Joined: Mon May 31, 2021 1:51 am
Location: Berlin, DE

by BigBoyND

Campyforever wrote:
Sun Jan 01, 2023 2:14 am
It still would be nice to able to lock-out the big/big combo?
Small-small can cause the chain to rub the big ring. That's why the lock-out exists.

BdaGhisallo
Posts: 3261
Joined: Wed Mar 17, 2004 1:38 pm

by BdaGhisallo

Campyforever wrote:
Sun Jan 01, 2023 3:16 am
Here is another DA 12 question:
There are only 3 "approved" chainring combos- 34/50, 35/52 and 42/54
The Shimano combos are 50-34, 52-36 & 54-40.

Campyforever
Posts: 106
Joined: Sun Nov 06, 2022 1:32 pm

by Campyforever

BdaGhisallo wrote:
Sun Jan 01, 2023 11:00 am
Campyforever wrote:
Sun Jan 01, 2023 3:16 am
Here is another DA 12 question:
There are only 3 "approved" chainring combos- 34/50, 35/52 and 42/54
The Shimano combos are 50-34, 52-36 & 54-40.
oK- so how about an answer?

spdntrxi
Posts: 5789
Joined: Sat Jul 20, 2013 6:11 pm

by spdntrxi

Campyforever wrote:
Sun Jan 01, 2023 2:34 pm
BdaGhisallo wrote:
Sun Jan 01, 2023 11:00 am
Campyforever wrote:
Sun Jan 01, 2023 3:16 am
Here is another DA 12 question:
There are only 3 "approved" chainring combos- 34/50, 35/52 and 42/54
The Shimano combos are 50-34, 52-36 & 54-40.
oK- so how about an answer?
that is the answer. That is the chainring sizes they make and for example what others make as well.. ie Carbon-Ti Evo rings. Does not mean others will not work. On my 11 speed bike I run 52/34 and so does my neighbor after he noticed I was having no issues.
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Campyforever
Posts: 106
Joined: Sun Nov 06, 2022 1:32 pm

by Campyforever

Huh? My question had to do with mixing and matching chainrings....

CustomMetal
Moderator
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Location: UK

by CustomMetal

Campyforever wrote:
Sun Jan 01, 2023 3:04 pm
Huh? My question had to do with mixing and matching chainrings....
To be fair to others it was worded poorly and did not read like that
Allegra- Steel Lugs TBC
Aurelia- Stainless All Road 8.5kg
Bertha- TT 9.8kg
Perdita- Ti Turbo bike 8kg
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Alya- Ti Climbing TBC

All weights with pedals,cages & garmin mount

Campyforever
Posts: 106
Joined: Sun Nov 06, 2022 1:32 pm

by Campyforever

CustomMetal wrote:
Sun Jan 01, 2023 3:48 pm
Campyforever wrote:
Sun Jan 01, 2023 3:04 pm
Huh? My question had to do with mixing and matching chainrings....
To be fair to others it was worded poorly and did not read like that
If this is unclear, god help us...
Here is another DA 12 question:
There are only 3 "approved" chainring combos- 34/50, 35/52 and 42/54

What would happen if an aftermarket 40 is combined with a 50 or if a 40 is added to the 52?

I can speculate that shifting will not be any good.... but has anyone experimented with alternative
chainrings? Are there any rules to follow?

User avatar
wheelsONfire
Posts: 6283
Joined: Mon Jul 07, 2014 8:15 am
Location: NorthEU

by wheelsONfire

With respect to the idea of using big ring (or one) i mostly use my 50T and seldom small, that's why i use 50/36.
I'd rather use 50/37 as Sram AXS, but without the 10t cassette cog. I feel the 11t cog feels restrained already.
I wonder what next groupset update will be talking Sram. I hope it's more than the shifters design.
Will Sram ever progress away from JAW and use a motor instead (more Shimano styled).
Or will they use that patent of a chainset with the FD integrated!?
Bikes:

Ax Lightness Vial EVO Race (2019.01.03)
Open *UP* (2016.04.14)
Paduano Racing Fidia (kind of shelved)


Ex bike; Vial EVO D, Vial EVO Ultra, Scott Foil, Paduano ti bike.

Ritxis
Posts: 1119
Joined: Fri Jun 01, 2012 3:00 pm
Location: San Sebastian

by Ritxis

Campyforever wrote:
Sun Jan 01, 2023 3:50 pm
CustomMetal wrote:
Sun Jan 01, 2023 3:48 pm
Campyforever wrote:
Sun Jan 01, 2023 3:04 pm
Huh? My question had to do with mixing and matching chainrings....
To be fair to others it was worded poorly and did not read like that
If this is unclear, god help us...
Here is another DA 12 question:
There are only 3 "approved" chainring combos- 34/50, 35/52 and 42/54

What would happen if an aftermarket 40 is combined with a 50 or if a 40 is added to the 52?

I can speculate that shifting will not be any good.... but has anyone experimented with alternative
chainrings? Are there any rules to follow?
I have Miche 48-33 chainrings... and I have also used 48-35 on Sram Red GXP cranks, and the Ultegra 8150 derailleur is fine... better than the Dura-ace 9070 that I used before with 11s

spdntrxi
Posts: 5789
Joined: Sat Jul 20, 2013 6:11 pm

by spdntrxi

Campyforever wrote:
Sun Jan 01, 2023 3:50 pm
CustomMetal wrote:
Sun Jan 01, 2023 3:48 pm
Campyforever wrote:
Sun Jan 01, 2023 3:04 pm
Huh? My question had to do with mixing and matching chainrings....
To be fair to others it was worded poorly and did not read like that
If this is unclear, god help us...
Here is another DA 12 question:
There are only 3 "approved" chainring combos- 34/50, 35/52 and 42/54

What would happen if an aftermarket 40 is combined with a 50 or if a 40 is added to the 52?

I can speculate that shifting will not be any good.... but has anyone experimented with alternative
chainrings? Are there any rules to follow?
the original question was unclear, not your follow up asking about mixed chainrings... anyways you have to try and see.

I like to get Carbon-Ti Evo, but would prefer to run the 52/34 combo that I do now. My 11sp bike runs an extralite 52/34 with no issues. Per extralite this is not a approved combo.
2024 BMC TeamMachine R Building
2018 BMC TImeMachine Road
2002 Moots Compact-SL- getting aero look makeover
2019 Parlee Z0XD - "classified"
2023 Pivot E-Vault - completed project, full Xplr package

Kluuz
Posts: 14
Joined: Sun Feb 13, 2022 10:53 pm

by Kluuz

Edit: Nvm, replied to old post. :sorry:

by Weenie


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BdaGhisallo
Posts: 3261
Joined: Wed Mar 17, 2004 1:38 pm

by BdaGhisallo

Can the SM-PCE01 be used to update the firmware on 12sp DI2 components with the new Y79M9801T SD300 connector cable?

Or is the SM-PCE02 the only option these days?

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