MTB Tech Rumors and Innovation

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Primoz
Posts
4541
Joined
8/1/2009
Location
SI
2/6/2025 12:58pm

The Session rocker has a pinch bolt to clamp down on the axle in order to provide some more torsional stiffness. The rocker is just 2 separate plates with no bridge in between them. Without the pinch bolt the two plates would likely be able to rotate one against another (and possibly untighten the bolt too).

As for the antisquat and antirise changing with changing pivot location, antisquat yes, antirise probably not that much as it's a split pivot.

3
2/6/2025 1:14pm
sspomer wrote:
light on tech but high on fun (and putting here b/c half of you never go to the homepage : )our dirt jump bike test sesh...

light on tech but high on fun (and putting here b/c half of you never go to the homepage : )

our dirt jump bike test sesh - https://www.vitalmtb.com/features/6-dirt-jumpers-tested-and-compared-vital-mtb-test-sessions

DJTestSeshA1.jpg?VersionId=VPL3KEf.jPqDV8zNnu4WlaZk

There's a home page?

21
krabo83
Posts
717
Joined
12/26/2017
Location
AT
2/6/2025 1:42pm
motomike wrote:
Tech: what appears to be a flip chip on the main pivot of the proto Session.

Tech: what appears to be a flip chip on the main pivot of the proto Session.

IMG 8337.jpeg?VersionId=28fdST9YZN4aZm2MLqmUxQbLzvez9

not gonna start a brake discussion, but i think it’s interesting that lachie is also riding centerline rotors with mavens, same as vali hoell.

1
1llumA
Posts
213
Joined
3/11/2020
Location
CA
2/6/2025 2:39pm
ballz wrote:

12sp 10-45 cassette? 🤔

Current Gen XTR/XT/SLX all have a 10-45 Hyperglide+ 12 speed cassette option since their launch. It's also the same cassette that are used for current mechanical GRX 12 speed 1x with medium cage derailleur.

 

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ballz
Posts
474
Joined
7/30/2024
Location
Ouagadougou EH
2/6/2025 2:46pm
Etney wrote:
The weightweenies thread that was linked earlier with the XTR Di2 is now updated with the new XTR brakes as well. Looks nicehttps://weightweenies.starbike.com/forum/viewtopic.php?t=171477&start=60

The weightweenies thread that was linked earlier with the XTR Di2 is now updated with the new XTR brakes as well. Looks nice

https://weightweenies.starbike.com/forum/viewtopic.php?t=171477&start=60

Sin t%C3%ADtulo%281%29

I am wandering how pointy the bite is going to be.

6
2/6/2025 3:16pm
motomike wrote:
Tech: what appears to be a flip chip on the main pivot of the proto Session.

Tech: what appears to be a flip chip on the main pivot of the proto Session.

IMG 8337.jpeg?VersionId=28fdST9YZN4aZm2MLqmUxQbLzvez9
krabo83 wrote:

not gonna start a brake discussion, but i think it’s interesting that lachie is also riding centerline rotors with mavens, same as vali hoell.

Because the Mavens are very powerful and the Centreline rotors take some of that bite away.

4
smelly
Posts
217
Joined
3/7/2016
Location
Colorado Springs, CO US
2/6/2025 6:42pm
1llumA wrote:
Current Gen XTR/XT/SLX all have a 10-45 Hyperglide+ 12 speed cassette option since their launch. It's also the same cassette that are used for current mechanical...

Current Gen XTR/XT/SLX all have a 10-45 Hyperglide+ 12 speed cassette option since their launch. It's also the same cassette that are used for current mechanical GRX 12 speed 1x with medium cage derailleur.

 

Great to have this option

Only a vertical wall climb requires a 51t on an e bike. And on my hardtail, which mostly just is used for shorter trail rides, I run a 11-42 and rarely use the 42. Some of us would rather a tight spread than wide range  

BITD I ran a 11-32 with a 34 up front and never had any issues. Kids these days 🤔

7
9
piratetrails
Posts
282
Joined
8/28/2021
Location
Arcadia, VA US
2/6/2025 8:12pm

Just noticed that Bulldog’s jersey has a huge DJI sponsor front and center. Could it mean an Ari eeb with a DJI motor at some point? After all, I don’t think he’ll be riding the new Forbidden DJI bike.

3
1
Eae903
Posts
359
Joined
10/20/2023
Location
Laramie, WY US
2/6/2025 8:28pm
Just noticed that Bulldog’s jersey has a huge DJI sponsor front and center. Could it mean an Ari eeb with a DJI motor at some point...

Just noticed that Bulldog’s jersey has a huge DJI sponsor front and center. Could it mean an Ari eeb with a DJI motor at some point? After all, I don’t think he’ll be riding the new Forbidden DJI bike.

Could be, but he could also be using DJI action cameras, they make a pretty good gopro style camera. 

8
Trocko
Posts
152
Joined
11/23/2010
Location
Rocky, CO US
2/6/2025 8:45pm

Saw the new upcoming turbo levo out in the trail today. Passed by me so just enough visual to know it was a turbo levo and with no upper crossbar by the shock. Can’t say much else or specialized might take my post down 

21
2/6/2025 8:56pm

Does anyone have a date for a shimano release? Rumours last year from Shimano Rep was feb but not sure now?

2
AgrAde
Posts
196
Joined
5/21/2015
Location
AL US
2/6/2025 10:37pm
Primoz wrote:
The Session rocker has a pinch bolt to clamp down on the axle in order to provide some more torsional stiffness. The rocker is just 2...

The Session rocker has a pinch bolt to clamp down on the axle in order to provide some more torsional stiffness. The rocker is just 2 separate plates with no bridge in between them. Without the pinch bolt the two plates would likely be able to rotate one against another (and possibly untighten the bolt too).

As for the antisquat and antirise changing with changing pivot location, antisquat yes, antirise probably not that much as it's a split pivot.

I'm glad you're here. I barely need to post. You keep writing exactly what I am about to.

4
Primoz
Posts
4541
Joined
8/1/2009
Location
SI
2/6/2025 11:21pm
1llumA wrote:
Current Gen XTR/XT/SLX all have a 10-45 Hyperglide+ 12 speed cassette option since their launch. It's also the same cassette that are used for current mechanical...

Current Gen XTR/XT/SLX all have a 10-45 Hyperglide+ 12 speed cassette option since their launch. It's also the same cassette that are used for current mechanical GRX 12 speed 1x with medium cage derailleur.

 

smelly wrote:
Great to have this optionOnly a vertical wall climb requires a 51t on an e bike. And on my hardtail, which mostly just is used for...

Great to have this option

Only a vertical wall climb requires a 51t on an e bike. And on my hardtail, which mostly just is used for shorter trail rides, I run a 11-42 and rarely use the 42. Some of us would rather a tight spread than wide range  

BITD I ran a 11-32 with a 34 up front and never had any issues. Kids these days 🤔

As I say to everybody with a view like yours, come to Slovenia. We have a few climbs here where it's likely you'll be wishing for a 28t ring up front to replace the 30t on your bike to pair up with that wide range, 50+ tooth cassette out back. 

There are some people that can push insane gear ratios everywhere, but they are far an in between. There are different terrains around the world requiring different approaches. But overall, for most people, wide range cassettes are a benefit, not a negative. Having more options is great, but catering to a small percentage (a loud percentage, but still small) is something few companies will do... 

34
Philip747
Posts
7
Joined
1/4/2024
Location
zutendaal BE
2/7/2025 4:06am
1llumA wrote:
Current Gen XTR/XT/SLX all have a 10-45 Hyperglide+ 12 speed cassette option since their launch. It's also the same cassette that are used for current mechanical...

Current Gen XTR/XT/SLX all have a 10-45 Hyperglide+ 12 speed cassette option since their launch. It's also the same cassette that are used for current mechanical GRX 12 speed 1x with medium cage derailleur.

 

smelly wrote:
Great to have this optionOnly a vertical wall climb requires a 51t on an e bike. And on my hardtail, which mostly just is used for...

Great to have this option

Only a vertical wall climb requires a 51t on an e bike. And on my hardtail, which mostly just is used for shorter trail rides, I run a 11-42 and rarely use the 42. Some of us would rather a tight spread than wide range  

BITD I ran a 11-32 with a 34 up front and never had any issues. Kids these days 🤔

Primoz wrote:
As I say to everybody with a view like yours, come to Slovenia. We have a few climbs here where it's likely you'll be wishing for...

As I say to everybody with a view like yours, come to Slovenia. We have a few climbs here where it's likely you'll be wishing for a 28t ring up front to replace the 30t on your bike to pair up with that wide range, 50+ tooth cassette out back. 

There are some people that can push insane gear ratios everywhere, but they are far an in between. There are different terrains around the world requiring different approaches. But overall, for most people, wide range cassettes are a benefit, not a negative. Having more options is great, but catering to a small percentage (a loud percentage, but still small) is something few companies will do... 

The new Classified 10-40 cassette gives you 570 range I think ;-)

3
Primoz
Posts
4541
Joined
8/1/2009
Location
SI
2/7/2025 4:37am

Says 530 % on their site. Looks like you get an effectively 10-53T cassette with very fine gear jumps and quite a bit more complexity (parts, shifting methods, etc.).

I would love a Classified system (and is an option where I would like electronic shifting) if the cassette was 6spd 10-14-18-24-32-44 with a Classified-esque system filling in the gaps. So not to offset the whole cassette, but to actually use each cog of the cassette for 2 gears. And do it via a single remote.

3
dwhere
Posts
187
Joined
10/5/2023
Location
dirty, DE US
2/7/2025 4:58am
Primoz wrote:
Says 530 % on their site. Looks like you get an effectively 10-53T cassette with very fine gear jumps and quite a bit more complexity (parts...

Says 530 % on their site. Looks like you get an effectively 10-53T cassette with very fine gear jumps and quite a bit more complexity (parts, shifting methods, etc.).

I would love a Classified system (and is an option where I would like electronic shifting) if the cassette was 6spd 10-14-18-24-32-44 with a Classified-esque system filling in the gaps. So not to offset the whole cassette, but to actually use each cog of the cassette for 2 gears. And do it via a single remote.

That's where they need to go for wide spread acceptance. If they can reduce the largest cog and go with a short derailleur cage, all the better.

2
sethimus
Posts
877
Joined
9/20/2014
Location
CH
2/7/2025 5:08am
1llumA wrote:
Current Gen XTR/XT/SLX all have a 10-45 Hyperglide+ 12 speed cassette option since their launch. It's also the same cassette that are used for current mechanical...

Current Gen XTR/XT/SLX all have a 10-45 Hyperglide+ 12 speed cassette option since their launch. It's also the same cassette that are used for current mechanical GRX 12 speed 1x with medium cage derailleur.

 

smelly wrote:
Great to have this optionOnly a vertical wall climb requires a 51t on an e bike. And on my hardtail, which mostly just is used for...

Great to have this option

Only a vertical wall climb requires a 51t on an e bike. And on my hardtail, which mostly just is used for shorter trail rides, I run a 11-42 and rarely use the 42. Some of us would rather a tight spread than wide range  

BITD I ran a 11-32 with a 34 up front and never had any issues. Kids these days 🤔

damn you’re so cool, can we hang out and can i call you my friend?

8
7
NY_Star
Posts
94
Joined
11/28/2010
Location
US
2/7/2025 5:20am
motomike wrote:
Tech: what appears to be a flip chip on the main pivot of the proto Session.

Tech: what appears to be a flip chip on the main pivot of the proto Session.

IMG 8337.jpeg?VersionId=28fdST9YZN4aZm2MLqmUxQbLzvez9

I would guess its not so much of a "flip chip" rather then different slugs that can be used to to fine tune position.Something like the photo below.
Upper A-Arm Slug Kit

3
1
Primoz
Posts
4541
Joined
8/1/2009
Location
SI
2/7/2025 5:33am

Technically any slug that is not centred is also a flip chip 🙂

5
mickey
Posts
239
Joined
2/19/2010
Location
Roanoke, VA US
2/7/2025 5:46am

Classified hubs?  Nah.

I am testing one on a road bike, even in that application the extra weight on the rear wheel throws off handling enough for me to not be interested in the product.   Adding all that  extra mass at your rear axle?  No thanks.

7
2/7/2025 6:48am
Trocko wrote:
Saw the new upcoming turbo levo out in the trail today. Passed by me so just enough visual to know it was a turbo levo and...

Saw the new upcoming turbo levo out in the trail today. Passed by me so just enough visual to know it was a turbo levo and with no upper crossbar by the shock. Can’t say much else or specialized might take my post down 

Is it safe to say that you thought you saw a Levo SL but then realized it looked like a higher-calorie version of an SL?

1
ballz
Posts
474
Joined
7/30/2024
Location
Ouagadougou EH
2/7/2025 8:34am
motomike wrote:
Tech: what appears to be a flip chip on the main pivot of the proto Session.

Tech: what appears to be a flip chip on the main pivot of the proto Session.

IMG 8337.jpeg?VersionId=28fdST9YZN4aZm2MLqmUxQbLzvez9
NY_Star wrote:
I would guess its not so much of a "flip chip" rather then different slugs that can be used to to fine tune position.Something like the...

I would guess its not so much of a "flip chip" rather then different slugs that can be used to to fine tune position.Something like the photo below.
Upper A-Arm Slug Kit

The rightmost one in the image turns your Trek into a Yeti.

11
2/7/2025 9:05am

Instead of the Classified system, we need to ressurect the Hammerschmidt. Refine that system, get it lighter, 2x instead of 1.6x overdrive, and now you can run a DH rear cassette-shifter on your enduro bike.  

14
2/7/2025 9:16am
Instead of the Classified system, we need to ressurect the Hammerschmidt. Refine that system, get it lighter, 2x instead of 1.6x overdrive, and now you can...

Instead of the Classified system, we need to ressurect the Hammerschmidt. Refine that system, get it lighter, 2x instead of 1.6x overdrive, and now you can run a DH rear cassette-shifter on your enduro bike.  

I had that idea too some month ago to use the Hammerschmidt and a GX DH on my enduro bike but the gears were overlaping. And the Range wasn‘t that Great. But I would buy a Hammerschmidt with 1:2.

4
dolface
Posts
1667
Joined
10/26/2015
Location
CA US
2/7/2025 9:28am
Instead of the Classified system, we need to ressurect the Hammerschmidt. Refine that system, get it lighter, 2x instead of 1.6x overdrive, and now you can...

Instead of the Classified system, we need to ressurect the Hammerschmidt. Refine that system, get it lighter, 2x instead of 1.6x overdrive, and now you can run a DH rear cassette-shifter on your enduro bike.  

3
2/7/2025 11:10am
Instead of the Classified system, we need to ressurect the Hammerschmidt. Refine that system, get it lighter, 2x instead of 1.6x overdrive, and now you can...

Instead of the Classified system, we need to ressurect the Hammerschmidt. Refine that system, get it lighter, 2x instead of 1.6x overdrive, and now you can run a DH rear cassette-shifter on your enduro bike.  

dolface wrote:

Bike tech is a circular cycle. You know what else is a circular cycle? Crab. Stream the crab cycle there is only one step it is crab by ...

46
1
Fred_Pop
Posts
218
Joined
11/26/2017
Location
FR
2/7/2025 11:36am
1llumA wrote:
Current Gen XTR/XT/SLX all have a 10-45 Hyperglide+ 12 speed cassette option since their launch. It's also the same cassette that are used for current mechanical...

Current Gen XTR/XT/SLX all have a 10-45 Hyperglide+ 12 speed cassette option since their launch. It's also the same cassette that are used for current mechanical GRX 12 speed 1x with medium cage derailleur.

 

smelly wrote:
Great to have this optionOnly a vertical wall climb requires a 51t on an e bike. And on my hardtail, which mostly just is used for...

Great to have this option

Only a vertical wall climb requires a 51t on an e bike. And on my hardtail, which mostly just is used for shorter trail rides, I run a 11-42 and rarely use the 42. Some of us would rather a tight spread than wide range  

BITD I ran a 11-32 with a 34 up front and never had any issues. Kids these days 🤔

I take it you don't have or ride very steep long climbs around your area. I'm currently running a rear 52T cog with a front 22T chainring. I'd love a 60T cog so I could run a bigger chainring.

3
8
2/7/2025 12:25pm
1llumA wrote:
Current Gen XTR/XT/SLX all have a 10-45 Hyperglide+ 12 speed cassette option since their launch. It's also the same cassette that are used for current mechanical...

Current Gen XTR/XT/SLX all have a 10-45 Hyperglide+ 12 speed cassette option since their launch. It's also the same cassette that are used for current mechanical GRX 12 speed 1x with medium cage derailleur.

 

smelly wrote:
Great to have this optionOnly a vertical wall climb requires a 51t on an e bike. And on my hardtail, which mostly just is used for...

Great to have this option

Only a vertical wall climb requires a 51t on an e bike. And on my hardtail, which mostly just is used for shorter trail rides, I run a 11-42 and rarely use the 42. Some of us would rather a tight spread than wide range  

BITD I ran a 11-32 with a 34 up front and never had any issues. Kids these days 🤔

Fred_Pop wrote:
I take it you don't have or ride very steep long climbs around your area. I'm currently running a rear 52T cog with a front 22T...

I take it you don't have or ride very steep long climbs around your area. I'm currently running a rear 52T cog with a front 22T chainring. I'd love a 60T cog so I could run a bigger chainring.

I call BS, who even sells 22t chainrings? And how many chains do you get through???

2
3
Robbie420
Posts
32
Joined
11/30/2014
Location
Kamloops CA
2/7/2025 12:35pm
smelly wrote:
Great to have this optionOnly a vertical wall climb requires a 51t on an e bike. And on my hardtail, which mostly just is used for...

Great to have this option

Only a vertical wall climb requires a 51t on an e bike. And on my hardtail, which mostly just is used for shorter trail rides, I run a 11-42 and rarely use the 42. Some of us would rather a tight spread than wide range  

BITD I ran a 11-32 with a 34 up front and never had any issues. Kids these days 🤔

Fred_Pop wrote:
I take it you don't have or ride very steep long climbs around your area. I'm currently running a rear 52T cog with a front 22T...

I take it you don't have or ride very steep long climbs around your area. I'm currently running a rear 52T cog with a front 22T chainring. I'd love a 60T cog so I could run a bigger chainring.

I call BS, who even sells 22t chainrings? And how many chains do you get through???

There's actually lot's of 22t chainrings out there. 

4
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