MTB Tech Rumors and Innovation

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2/6/2025 4:29am
zscs wrote:
Some new photos from the new Shimano 12-speed wireless Di2 sets, posted here (no idea about the source): https://weightweenies.starbike.com/forum/viewtopic.php?t=171477&start=45It seems the set is full wireless...

Some new photos from the new Shimano 12-speed wireless Di2 sets, posted here (no idea about the source): https://weightweenies.starbike.com/forum/viewtopic.php?t=171477&start=45

i5395846749.png?VersionId=337ZmQ7mlwLAyWT1svMdUqli5394323711

It seems the set is full wireless. +1 pic from the new XTR crankset.

i5394329059.png?VersionId=i3NTEW
Finkill wrote:
The XTR branding looks as if they got SRAM to do it. I wonder if they will do an aluminium crank for trail/Enduro and a carbon...

The XTR branding looks as if they got SRAM to do it. I wonder if they will do an aluminium crank for trail/Enduro and a carbon crank for XC? 

zscs wrote:
I don't have any idea. Could be logical, hopefully we'll see it soon.Two further close photos (see e.g. the '12s' text). The cages seems to be...

I don't have any idea. Could be logical, hopefully we'll see it soon.

Two further close photos (see e.g. the '12s' text). The cages seems to be different length on the two (?). Eagle-eyed people here might see some further important info, propably. Wink

i5396650806i5394323737

Most likely the short cage version can also be branded as GRX Di2 where 10-45 is a popular option unlike on the mtb. The branding on the crank doesn't look great IMO and it seems that XTR is back on the normal Hollowtech II axle setup connected to the DS arm like current XT/SLX/Deore.

Also looks like there is a new clutch system ? Shadowtech II ? There is no visible flip lever and no 2mm port for adjusting tension on those pictures.

 

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2/6/2025 4:45am
1llumA wrote:
Most likely the short cage version can also be branded as GRX Di2 where 10-45 is a popular option unlike on the mtb. The branding on...

Most likely the short cage version can also be branded as GRX Di2 where 10-45 is a popular option unlike on the mtb. The branding on the crank doesn't look great IMO and it seems that XTR is back on the normal Hollowtech II axle setup connected to the DS arm like current XT/SLX/Deore.

Also looks like there is a new clutch system ? Shadowtech II ? There is no visible flip lever and no 2mm port for adjusting tension on those pictures.

 

The clutch adjustment port has always seemed a bit off and a weakpoint where moisture and dirt can enter... And honestly how often do you adjust the clutch? Not that often and for that occasion you can open the cover via 3 bolts and also quickly check its state.

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1
ex-ballz
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2/6/2025 5:53am
slimshady wrote:
Yup,, I posted that a good 12 months ago. XTR and XT will have a trail/enduro and XC version, with heavier cranks/brakes/wheels for the enduro flavor. And...

Yup,, I posted that a good 12 months ago. XTR and XT will have a trail/enduro and XC version, with heavier cranks/brakes/wheels for the enduro flavor.

 

And they will be 13-speed.

Fredo90 wrote:
For my info everything stays 12s, no 13s incoming...! Talk to a Manufactory insider a few weeks back. XTR / XT / Deore 12s Wireless - 10-51...

For my info everything stays 12s, no 13s incoming...! Talk to a Manufactory insider a few weeks back. 

XTR / XT / Deore 12s Wireless - 10-51 and 11-45 

And NO Saint incoming, all the Proto Brakes are new XTR 4 Piston...But thes just my infos...

12sp 10-45 cassette? 🤔

jonkranked
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2/6/2025 6:06am
slimshady wrote:
Yup,, I posted that a good 12 months ago. XTR and XT will have a trail/enduro and XC version, with heavier cranks/brakes/wheels for the enduro flavor. And...

Yup,, I posted that a good 12 months ago. XTR and XT will have a trail/enduro and XC version, with heavier cranks/brakes/wheels for the enduro flavor.

 

And they will be 13-speed.

you saw a catalog over a year ago, seems your 13 speed info appears to be outdated.  give it up. 

2
jonkranked
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2/6/2025 6:08am
JerseyMojo wrote:

Anyone want to fill me in on what I missed with the pulled Fox post? 😁

some info was gleaned about an upcoming fox fork. it apparently has travel, an axle, and a steerer tube. the information was apparently correct, which is why its gone. 

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krabo83
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2/6/2025 6:17am
JerseyMojo wrote:

Anyone want to fill me in on what I missed with the pulled Fox post? 😁

jonkranked wrote:
some info was gleaned about an upcoming fox fork. it apparently has travel, an axle, and a steerer tube. the information was apparently correct, which is...

some info was gleaned about an upcoming fox fork. it apparently has travel, an axle, and a steerer tube. the information was apparently correct, which is why its gone. 

final question regarding this topic:

got the info/pics of the new 36 removed or the rumor about a 170mm USD fork called podium?

sorry, to lazy to sift through the old pages Smile

1
dwhere
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2/6/2025 6:59am
JerseyMojo wrote:

Anyone want to fill me in on what I missed with the pulled Fox post? 😁

jonkranked wrote:
some info was gleaned about an upcoming fox fork. it apparently has travel, an axle, and a steerer tube. the information was apparently correct, which is...

some info was gleaned about an upcoming fox fork. it apparently has travel, an axle, and a steerer tube. the information was apparently correct, which is why its gone. 

krabo83 wrote:
final question regarding this topic:got the info/pics of the new 36 removed or the rumor about a 170mm USD fork called podium?sorry, to lazy to sift...

final question regarding this topic:

got the info/pics of the new 36 removed or the rumor about a 170mm USD fork called podium?

sorry, to lazy to sift through the old pages Smile

I cant remember if the original post said USD or that was insinuated based on the other rumors. But it was referencing a long travel single crown with beefy headtube and 20m axel. 

1
motomike
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2/6/2025 9:53am

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

IMG 8337.jpeg?VersionId=28fdST9YZN4aZm2MLqmUxQbLzvez9
19
MauiMax
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2/6/2025 10:06am
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

Also 2 different spots for the lower shock mount. Any idea what kinematic theyd be changing by moving the main pivot up and down that much? Thats like high pivot and even higher pivot

1
MrDuck
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2/6/2025 10:58am
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
MauiMax wrote:
Also 2 different spots for the lower shock mount. Any idea what kinematic theyd be changing by moving the main pivot up and down that much...

Also 2 different spots for the lower shock mount. Any idea what kinematic theyd be changing by moving the main pivot up and down that much? Thats like high pivot and even higher pivot

That's pretty much exactly it. You'll affect the axle path and CS growth by moving the main pivot. Moving hte lower shock mount will tune progression.

4
FaahkEet
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2/6/2025 11:02am
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

Why is the central rocker pivot split? Does it pinch down to prevent the bolt from backing out?

2
2/6/2025 11:02am
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
MauiMax wrote:
Also 2 different spots for the lower shock mount. Any idea what kinematic theyd be changing by moving the main pivot up and down that much...

Also 2 different spots for the lower shock mount. Any idea what kinematic theyd be changing by moving the main pivot up and down that much? Thats like high pivot and even higher pivot

MrDuck wrote:

That's pretty much exactly it. You'll affect the axle path and CS growth by moving the main pivot. Moving hte lower shock mount will tune progression.

Also anti squat & anti rise - would increase both of them quite a lot

4
MauiMax
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2/6/2025 11:08am
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
FaahkEet wrote:

Why is the central rocker pivot split? Does it pinch down to prevent the bolt from backing out?

Looks like it has a bolt in it from the bottom to clamp it down on the pivot bolt. Maybe to prevent any slight side to side movement. 

3
2/6/2025 11:34am
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
FaahkEet wrote:

Why is the central rocker pivot split? Does it pinch down to prevent the bolt from backing out?

Possibly to allow you to preload the bearings properly, and not crush them since it doesn't look like there is a brace between the 2 rockers

4
Primoz
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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
notthatbryan
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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
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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
2/6/2025 2:39pm
ex-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.

 

8
ex-ballz
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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
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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
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
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Eae903
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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
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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
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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
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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... 

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