MTB Tech Rumors and Innovation

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Prototype
MTBrent 8/20/2022 7:54pm
8/20/2022 7:54pm
Jrp wrote:
What in the holy high single pivot is this [img]https://p.vitalmtb.com/photos/forums/2022/08/20/12893/s1200_D9A88186_6545_48E7_B7C2_37BBFCB7768A.jpg[/img]
What in the holy high single pivot is this
From the ol’ Google machine:

https://www.brazn.bike/
hitar_potar 8/20/2022 11:27pm
8/20/2022 11:27pm
Looks like a carbon single high-pivot AM/enduro e-bike by the looks of it (more likely an AM one cause the fork looks like max 150-160mm).
Erwan_Ghesquiere 8/21/2022 12:52am
8/21/2022 12:52am
Jrp wrote:
What in the holy high single pivot is this [img]https://p.vitalmtb.com/photos/forums/2022/08/20/12893/s1200_D9A88186_6545_48E7_B7C2_37BBFCB7768A.jpg[/img]
What in the holy high single pivot is this
MTBrent wrote:
From the ol’ Google machine:

https://www.brazn.bike/
Jesus that poor idler pulley, one side supported as well, that's going to be fun ...
2
Jrp
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Jrp 8/21/2022 4:23am
8/21/2022 4:23am
Jrp wrote:
What in the holy high single pivot is this [img]https://p.vitalmtb.com/photos/forums/2022/08/20/12893/s1200_D9A88186_6545_48E7_B7C2_37BBFCB7768A.jpg[/img]
What in the holy high single pivot is this
MTBrent wrote:
From the ol’ Google machine:

https://www.brazn.bike/
Erwan_Ghesquiere wrote:
Jesus that poor idler pulley, one side supported as well, that's going to be fun ...
That’s assuming it ever stays on haha
sspomer
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sspomer 8/21/2022 7:18am
8/21/2022 7:18am
just add motor and idler?

(i know, not totally fair, but where my thoughts went first)
9
Brian_Peterson 8/21/2022 10:32am
8/21/2022 10:32am
sspomer wrote:
just add motor and idler? [img]https://p.vitalmtb.com/photos/forums/2022/08/21/12894/s1200_oldtrek.jpg[/img] (i know, not totally fair, but where my thoughts went first)
just add motor and idler?

(i know, not totally fair, but where my thoughts went first)
Had one of those come into the shop the other week.. My thought was that Trek was an idler away from being way ahead of the game..
3
carlinojoevideo 8/21/2022 12:13pm
8/21/2022 12:13pm
Some potential ideas towards the new Demo linkage?




6
Onawalk
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Onawalk 8/21/2022 12:37pm
8/21/2022 12:37pm
Apologies if this is the wrong spot, but I’ve seen some users on this forum posting linkage kinematic drawings/graphs for different bikes, and was wondering if anyone had them for the Transition Spire.
Just picked u]one up, and I’m curious about the different suspension kinematic graphs.

Thank you
1
lloyd506 8/21/2022 12:39pm
8/21/2022 12:39pm
The rear end of that Brazn must track as stiff as a wet noodle. Having previously ridden a hsp carbon bike there was quite a bit of flex.
3
carlinojoevideo 8/21/2022 1:29pm
8/21/2022 1:29pm
Onawalk wrote:
Apologies if this is the wrong spot, but I’ve seen some users on this forum posting linkage kinematic drawings/graphs for different bikes, and was wondering if...
Apologies if this is the wrong spot, but I’ve seen some users on this forum posting linkage kinematic drawings/graphs for different bikes, and was wondering if anyone had them for the Transition Spire.
Just picked u]one up, and I’m curious about the different suspension kinematic graphs.

Thank you
I see the 2021 kinematics;

https://linkagedesign.blogspot.com/2021/09/transition-spire-29-2021.htm…
4
peecee
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peecee 8/21/2022 6:45pm
8/21/2022 6:45pm Edited Date/Time 8/21/2022 6:46pm
carlinojoevideo wrote:
Some potential ideas towards the new Demo linkage? [img]https://p.vitalmtb.com/photos/forums/2022/08/21/12896/s1200_34DD41ED_B5F0_49DA_BD06_BBC75319080A.jpg[/img] [img]https://p.vitalmtb.com/photos/forums/2022/08/21/12895/s1200_69F33E2A_63B9_401E_9207_2E3094E09F6C.jpg[/img] [img]https://p.vitalmtb.com/photos/forums/2022/08/21/12897/s1200_0448D9EA_DD63_48FA_B581_ADF5C062E835.jpg[/img] [img]https://p.vitalmtb.com/photos/forums/2022/08/21/12898/s1200_C10ACBAE_77F4_48AD_B2DC_F9671FDFC745.jpg[/img]
Some potential ideas towards the new Demo linkage?




Yes, what’s old is new again! DM Maniac for the win haha

https://instagram.com/retro_downhill_mtb?igshid=YmMyMTA2M2Y=
Primoz
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Primoz 8/21/2022 9:56pm
8/21/2022 9:56pm Edited Date/Time 8/21/2022 9:59pm
@carlinojoevideo if I was a betting man, this would be the layout to drive the shock I would bet on with a horst-link layout to define the axle path.

Speaking of retro DH, I can't believe how much power nostalgia has. The Honda RN-01 is still such a magical bike, even after all these years.
https://www.instagram.com/p/CgZME68Ba2v/
5
carlinojoevideo 8/22/2022 7:39am
8/22/2022 7:39am
Primoz wrote:
@carlinojoevideo if I was a betting man, this would be the layout to drive the shock I would bet on with a horst-link layout to define...
@carlinojoevideo if I was a betting man, this would be the layout to drive the shock I would bet on with a horst-link layout to define the axle path.

Speaking of retro DH, I can't believe how much power nostalgia has. The Honda RN-01 is still such a magical bike, even after all these years.
https://www.instagram.com/p/CgZME68Ba2v/
There’s a podcast with Greg Minar and he talks about the bike. He was saying the forks would still be up to par today. Some cool technology like a rear shock that locked out on a timer then would go plush again after 10 seconds.

I’d love to test one!
2
Dirtyburger 8/23/2022 5:31am
8/23/2022 5:31am
sspomer wrote:
prototype sram drivetrain at world champs - what do you notice? https://www.vitalmtb.com/photos/features/New-SRAM-Drivetrain-at-World-Champs,13740/Prototype-SRAM-AXS-Drivetrain-at-World-Champs,153824/sspomer,2 [img]https://p.vitalmtb.com/photos/forums/2022/08/23/12902/s1200_1faad0c3_0300_415e_bb66_9d2c99c4ab6c.jpg[/img]
prototype sram drivetrain at world champs - what do you notice?
https://www.vitalmtb.com/photos/features/New-SRAM-Drivetrain-at-World-C…


The grand UDH plan has finally been revealed!
18
kcy4130
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kcy4130 8/23/2022 5:42am
8/23/2022 5:42am
Sram was granted a patent for this concept last year. Interesting.
yahmon
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yahmon 8/23/2022 6:29am
8/23/2022 6:29am
it looks like the motor and battery might be encased in the rear segment; maybe the parallelogram and cage are replaceable as a module? this has the potential to be awesome and make replacing/repairing a damaged AXS derailleur more affordable and less wasteful.

plus with a second arm and added rigidity, this might make bending derailleur hangers into a thing of the past.

wishful thinking?
1
AndehM
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AndehM 8/23/2022 6:41am
8/23/2022 6:41am
I'm not seeing any B-gap or limit screws either.
matmattmatthew
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matmattmatthew 8/23/2022 6:47am
8/23/2022 6:47am
The fact that SRAM made a proprietary derailleur hanger that is also backwards compatible to be used as a “regular” hanger is admirable. These are the kinds of “new standards” I can get behind.
21
nollak
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nollak 8/23/2022 7:02am
8/23/2022 7:02am
The cassette looks interesting as well.

Seems like the big 3 sprockets are connected with rivets and the lower are machined from one block.
2
chriskief 8/23/2022 7:06am
8/23/2022 7:06am
"SRAM T-Type chain only" written on the cassette. Looks similar to the flattop road chain.
2
Sir HC 8/23/2022 7:22am
8/23/2022 7:22am
Wonder if they've come up with a better bearing for the pulley wheels, or are they still going to wear out in 12weeks and then the shifting goes to shit.
7
TheShortestCharles 8/23/2022 8:27am
8/23/2022 8:27am
Pinned cogs in the largest 3; probably a different material to save weight (probably alloy vs steel for the rest of the cassette). Assuming that's a 50T or 52T in the largest, they've also fixed the awkward 8/10-tooth jump, which is great.
4
krabo83
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krabo83 8/23/2022 8:40am
8/23/2022 8:40am
Sir HC wrote:
Wonder if they've come up with a better bearing for the pulley wheels, or are they still going to wear out in 12weeks and then the...
Wonder if they've come up with a better bearing for the pulley wheels, or are they still going to wear out in 12weeks and then the shifting goes to shit.
my X01 eagle is running smooth for 3 seasons now.
2
Kadester
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Kadester 8/23/2022 8:50am
8/23/2022 8:50am
sspomer wrote:
prototype sram drivetrain at world champs - what do you notice? https://www.vitalmtb.com/photos/features/New-SRAM-Drivetrain-at-World-Champs,13740/Prototype-SRAM-AXS-Drivetrain-at-World-Champs,153824/sspomer,2 [img]https://p.vitalmtb.com/photos/forums/2022/08/23/12902/s1200_1faad0c3_0300_415e_bb66_9d2c99c4ab6c.jpg[/img]
prototype sram drivetrain at world champs - what do you notice?
https://www.vitalmtb.com/photos/features/New-SRAM-Drivetrain-at-World-C…





Looks like sram now has their own version of centerlock?
8
Noeserd
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Noeserd 8/23/2022 9:05am
8/23/2022 9:05am
sspomer wrote:
prototype sram drivetrain at world champs - what do you notice? https://www.vitalmtb.com/photos/features/New-SRAM-Drivetrain-at-World-Champs,13740/Prototype-SRAM-AXS-Drivetrain-at-World-Champs,153824/sspomer,2 [img]https://p.vitalmtb.com/photos/forums/2022/08/23/12902/s1200_1faad0c3_0300_415e_bb66_9d2c99c4ab6c.jpg[/img]
prototype sram drivetrain at world champs - what do you notice?
https://www.vitalmtb.com/photos/features/New-SRAM-Drivetrain-at-World-C…


That hanger looks like it can break your frame in a crash, looks too sturdy
9
Primoz
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Primoz 8/23/2022 9:26am
8/23/2022 9:26am
TheShortestCharles wrote:
Pinned cogs in the largest 3; probably a different material to save weight (probably alloy vs steel for the rest of the cassette). Assuming that's a...
Pinned cogs in the largest 3; probably a different material to save weight (probably alloy vs steel for the rest of the cassette). Assuming that's a 50T or 52T in the largest, they've also fixed the awkward 8/10-tooth jump, which is great.
This.
1
1
Primoz
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Primoz 8/23/2022 9:29am
8/23/2022 9:29am
Sir HC wrote:
Wonder if they've come up with a better bearing for the pulley wheels, or are they still going to wear out in 12weeks and then the...
Wonder if they've come up with a better bearing for the pulley wheels, or are they still going to wear out in 12weeks and then the shifting goes to shit.
krabo83 wrote:
my X01 eagle is running smooth for 3 seasons now.
4th season here, but I did open up, clean out (and de-rustified) and regreased the bearings a few times. And I have a new spare set in stock just in case.
1
Primoz
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Primoz 8/23/2022 9:33am
8/23/2022 9:33am
sspomer wrote:
prototype sram drivetrain at world champs - what do you notice? https://www.vitalmtb.com/photos/features/New-SRAM-Drivetrain-at-World-Champs,13740/Prototype-SRAM-AXS-Drivetrain-at-World-Champs,153824/sspomer,2 [img]https://p.vitalmtb.com/photos/forums/2022/08/23/12902/s1200_1faad0c3_0300_415e_bb66_9d2c99c4ab6c.jpg[/img]
prototype sram drivetrain at world champs - what do you notice?
https://www.vitalmtb.com/photos/features/New-SRAM-Drivetrain-at-World-C…


Kadester wrote:
[img]https://p.vitalmtb.com/photos/forums/2022/08/23/12906/s1200_E5FF59F8_3A0A_41F3_ACF4_07A8110DA819.jpg[/img] [img]https://p.vitalmtb.com/photos/forums/2022/08/23/12905/s1200_4645B7FE_927A_4800_AD83_905EB1E88D53.jpg[/img] Looks like sram now has their own version of centerlock?



Looks like sram now has their own version of centerlock?
That's just a fancy lockring. You can see the cassette splines near the hub spacer.

49 teeth + whatever is behind the hub, so I'm guessing 52 teeth on the big one. And looks like the large three sprockets are aluminium, yeah, so it's not only the 52T that'll wear out Smile

And FINALLY the 10T gap is gone.
2
JVP
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JVP 8/23/2022 9:38am
8/23/2022 9:38am Edited Date/Time 8/23/2022 1:22pm
sspomer wrote:
prototype sram drivetrain at world champs - what do you notice? https://www.vitalmtb.com/photos/features/New-SRAM-Drivetrain-at-World-Champs,13740/Prototype-SRAM-AXS-Drivetrain-at-World-Champs,153824/sspomer,2 [img]https://p.vitalmtb.com/photos/forums/2022/08/23/12902/s1200_1faad0c3_0300_415e_bb66_9d2c99c4ab6c.jpg[/img]
prototype sram drivetrain at world champs - what do you notice?
https://www.vitalmtb.com/photos/features/New-SRAM-Drivetrain-at-World-C…


There's a LOT going on here, and all of it looks good except for the centerlock junk.

Looks like smaller gear jumps between the biggest two cogs, which would be a HUGE improvement. Monoblock in the smaller cogs with pinned larger 3 for something costing/weighing between GX and X01.

That new sturdy hanger looks like a win. GX derailleurs are durable except the cheap metal-on-metal B-bolt kills them due to slop developing. No slop with this setup.

Edit after looking through pics:
I take that part about cost/weight between GX and X01 back. It's hanging off a pro xc racer whip, so it's going to be lighter. Current guess is monoblock, then either ti or aluminum on the big 3. Screw durability, the pro xc guys only care about weight.

My dreams of a 10-52 X01 with good spacing are on hold again.
2
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