MTB Tech Rumors and Innovation

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Primoz
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SI
6/14/2023 1:03am

Just a quick addition to tyres... How quickly do mtb tyres get old, anyone have any experience with that? I'm on a year old assegai and dhr 2 (roughly a year, not sure about the time scale) and I'm like a giraffe on ice if its damp or wet. Zero grip. Testing out some bikes last weekend with a new assegai and dissector or an addix soft magic mary in... Well slop, it was a a game changer, it's actually possible to ride in conditions like that! 

krabo83
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AT
6/14/2023 1:50am
Primoz wrote:
Just a quick addition to tyres... How quickly do mtb tyres get old, anyone have any experience with that? I'm on a year old assegai and...

Just a quick addition to tyres... How quickly do mtb tyres get old, anyone have any experience with that? I'm on a year old assegai and dhr 2 (roughly a year, not sure about the time scale) and I'm like a giraffe on ice if its damp or wet. Zero grip. Testing out some bikes last weekend with a new assegai and dissector or an addix soft magic mary in... Well slop, it was a a game changer, it's actually possible to ride in conditions like that! 

good question! i‘m running assegai maxgrip/dhr2 maxterra as my go to combo. normally i‘ll get about 6 months out of the reartire and about 1,5-2 seasons out of the front (i break way too much Smile ).

i do really suck when it‘s wet and slippery, but that‘s 99% on me IMO.

maybe that‘s something for another seperate thread?

Primoz
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6/14/2023 2:01am

It is, yeah... There's a Michelin thread already. 

1
FullSend
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201
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DE
6/14/2023 6:27am

New and updated Rocky Mountain Slayer dropping today, 6pm GMT+2 (or whatever equivalent in your time zone).

Marketed as a "freeride" bike with 180mm of travel front and rear, dual crown compatible, small and medium sizes are mullet while large and extra large are full 29er, features three-position geometry adjustment. Geometry is ultra progressive with 63° HTA, 78° STA and 510mm reach and 1320mm wheelbase on the size XL. Size L gets 480 reach and 1280mm wheelbase.

1
sspomer
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6332
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Boise, ID, USA
Fantasy
6/14/2023 6:49am

pit bits vid from leogang

 

 

4
6/14/2023 6:52am
FullSend wrote:
New and updated Rocky Mountain Slayer dropping today, 6pm GMT+2 (or whatever equivalent in your time zone). Marketed as a "freeride" bike with 180mm of travel...

New and updated Rocky Mountain Slayer dropping today, 6pm GMT+2 (or whatever equivalent in your time zone).

Marketed as a "freeride" bike with 180mm of travel front and rear, dual crown compatible, small and medium sizes are mullet while large and extra large are full 29er, features three-position geometry adjustment. Geometry is ultra progressive with 63° HTA, 78° STA and 510mm reach and 1320mm wheelbase on the size XL. Size L gets 480 reach and 1280mm wheelbase.

"Progressive geo" yet manage to use kids' bike sizes chainstays lol. Should be 435mm for the L and 445mm for XL (probably just a flip chip in the "long" setting). Yet another long bike that will be hard to corner without jumping on your stem, not because it is long, but just because it is unbalanced.

1
7
Dave_Camp
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468
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8/25/2009
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USA
6/14/2023 6:52am

Someone should make a general tire thread with a shared google doc spreadsheet of price/weight/conditions/grip (x/10) etc. 

 

8
1
6/14/2023 8:02am

In the latest pit bits video, Jordan Williams' mechanic confirms longer front and rear center on Jordan's bike.

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Jakub_G
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SK
6/14/2023 8:16am
TEAMROBOT wrote:
I agree that the Pirelli DH tires appear to be at least rideable. The Canyon/Pirelli team has some serious young racers like Dante Silva, Antoine Pierron...

I agree that the Pirelli DH tires appear to be at least rideable. The Canyon/Pirelli team has some serious young racers like Dante Silva, Antoine Pierron, and Loris Revelli who are consistently getting top 30 results on the Pirellis.

Regarding what's inside the racers tires- who knows? I wonder the same thing about the new Conti's, because in my mind there's no way a 1200 gram 29" DH tire is winning Snowshoe or Hardline or Lenzerheide or even getting to the bottom of the track with air in it. Meanwhile Minnaar got two flats this weekend running 1400 gram Maxxis tires, or even heavier if he's running the prototype "Breaker" pinch flat barrier in them. With Michelin and Schwalbe getting good results by moving up to 1500 gram DH casings, and with 1300-1400 DD and DH casing Maxxis tires serving as the norm on the EWS, I think the stock 1200 gram Conti tires are pretty unbelievable as World Cup DH tires. But who knows.

Hm, I would say this is very common misconception, that heavier tire is always more durable. If you compare older non tubeless maxxis dh casing tires with tlr dh casing, it's comical how flimsy that new tire feels despite being just as heavy or heavier than the old ones. And speaking of contis, old der baron apex dh was one of if not the lightest dh casing tire out there, while also being the most robust at the same time, crazy stiff sidewall which was the reason most people hated them outside of trials use where that stiffness gave it superb stability for of camber take offs. Tires are heavy if you use a lot of rubber, if you use stiffening compounds/inserts instead you get a whole lot lighter tire but vibration damping suffers.

2
1
nskerb
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Kelso, WA, USA
6/14/2023 8:26am

What else beyond laziness is stopping Pirelli from producing a DH tire on par or exceeding maxxis? They probably spend more money producing and shipping tires for a North American f1 weekend than it would take to develop the best DH tires out there lol. 

Primoz
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6/14/2023 8:29am Edited Date/Time 6/14/2023 8:29am

Being excellent in F1 tyre design is a whole different ball game to MTB or DH tyres. And regardless of the money available, money buys only so much time to speed up development. It will always take time regardless of the resources. And won't be complete until the product is proven at the top level. In WC racing. 

1
bikelurker
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Bilbao, Vizcaya, ES
6/14/2023 8:39am
Primoz wrote:
Being excellent in F1 tyre design is a whole different ball game to MTB or DH tyres. And regardless of the money available, money buys only...

Being excellent in F1 tyre design is a whole different ball game to MTB or DH tyres. And regardless of the money available, money buys only so much time to speed up development. It will always take time regardless of the resources. And won't be complete until the product is proven at the top level. In WC racing. 

F1 tyres are shit, as requested by the FIA

2
nskerb
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Kelso, WA, USA
6/14/2023 9:02am
Primoz wrote:
Being excellent in F1 tyre design is a whole different ball game to MTB or DH tyres. And regardless of the money available, money buys only...

Being excellent in F1 tyre design is a whole different ball game to MTB or DH tyres. And regardless of the money available, money buys only so much time to speed up development. It will always take time regardless of the resources. And won't be complete until the product is proven at the top level. In WC racing. 

You’re not wrong but I would imagine poaching some good development riders & designers wouldn’t be too difficult considering their financial resources. 

Primoz
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6/14/2023 11:56am

About damn time considering they shift the gearboxes under full load on their end of line checks using powerful motors. Plus getting rid of the gripshift is an added benefit Smile

5
TimBud
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GB
6/14/2023 12:11pm
Primoz wrote:
About damn time considering they shift the gearboxes under full load on their end of line checks using powerful motors. Plus getting rid of the gripshift...

About damn time considering they shift the gearboxes under full load on their end of line checks using powerful motors. Plus getting rid of the gripshift is an added benefit Smile

What tha fuq Primoz... you like electronic shifting now Woohoo

Anything to get rid of gripshift eh 

2
Primoz
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6/14/2023 12:38pm Edited Date/Time 6/14/2023 12:42pm

@TimBud well played sir, well played.

For sure, gripshift < electronic < cable actuated trigger Tongue

In all seriousness, getting rid of the gripshift is a part of it. I guess gripshift could have been good back in the day, but with modern drivetrains and the way we ride bikes (index finger on the brake, thumb shifting the gear, holding the bars nicely and consistently) I feel the gripshift could be more of a hinderance than a benefit.

The main reason I was... looking forward to an electronic shifting system for the Pinion is the fact that the shifting mechanism is basically right there on the outside of the gearbox and fairly easy to get to. That and the above mentioned fact that they can shift it under full load. Based off a Pinkbike review (haven't ridden one myself...) apparently you load up the shifter going to an easier gear, then let up on the pedals for it to click over and actually shift. The pawl/clutches/whatever is engaging the gear wants to stay there, but nothing is preventing it from moving out of the way (unlike the ratchet in the freehub, where you normally have a wedge geometry preventing slippage)... Except enough force. I'm hoping they made the electronic version of the shifter strong enough to be able to shift under full power or close to it and thus improve the shifting performance compared to the cable actuated gripshift. That and improve ergonomics.

I have nothing against electronic shifting, if there's a benefit. There is a possibility of a benefit in this case.

2
bizutch
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Fletcher, NC, USA
Fantasy
6/14/2023 12:44pm
Primoz wrote:
@TimBud well played sir, well played. For sure, gripshift < electronic < cable actuated trigger :P In all seriousness, getting rid of the gripshift is a...

@TimBud well played sir, well played.

For sure, gripshift < electronic < cable actuated trigger Tongue

In all seriousness, getting rid of the gripshift is a part of it. I guess gripshift could have been good back in the day, but with modern drivetrains and the way we ride bikes (index finger on the brake, thumb shifting the gear, holding the bars nicely and consistently) I feel the gripshift could be more of a hinderance than a benefit.

The main reason I was... looking forward to an electronic shifting system for the Pinion is the fact that the shifting mechanism is basically right there on the outside of the gearbox and fairly easy to get to. That and the above mentioned fact that they can shift it under full load. Based off a Pinkbike review (haven't ridden one myself...) apparently you load up the shifter going to an easier gear, then let up on the pedals for it to click over and actually shift. The pawl/clutches/whatever is engaging the gear wants to stay there, but nothing is preventing it from moving out of the way (unlike the ratchet in the freehub, where you normally have a wedge geometry preventing slippage)... Except enough force. I'm hoping they made the electronic version of the shifter strong enough to be able to shift under full power or close to it and thus improve the shifting performance compared to the cable actuated gripshift. That and improve ergonomics.

I have nothing against electronic shifting, if there's a benefit. There is a possibility of a benefit in this case.

Rode a buddy's gearbox bike and it was an absolute nightmare to try to nail shifts to easier gears before sudden steep pitches...say going around a turn to transition onto a new trail or up out of a gully.  

I'd be standing up on the pedals trying to keep it upright barely moving and begging the shifter to let me go to an easier gear.  

It was on a Zerode.  

I now await 5 pages of education on how simple it is and all the various techniques of why I should get my act together.

6
1
Onawalk
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CA
6/14/2023 6:17pm
Dave_Camp wrote:

Someone should make a general tire thread with a shared google doc spreadsheet of price/weight/conditions/grip (x/10) etc. 

 

Be the change you want to see in the world,  or something

4
mtbboy1993
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Location
Askim, NO
6/14/2023 11:19pm Edited Date/Time 6/15/2023 7:23am
Kusa wrote:
New?! Michelin Wild Enduro tires? Can't see them mentioned anywhere online. Seems like there is additional model name MS, MH (but I'm not so familiar with...

New?! Michelin Wild Enduro tires? Can't see them mentioned anywhere online. Seems like there is additional model name MS, MH (but I'm not so familiar with Michelin).

p6pb24884286

 Source https://www.pinkbike.com/news/bike-check-barca-prudkovas-unno-burn-endu…

I guess it might mean Medium Soft, Medium Hard.

You are right, these are not in their line up yet.

1
RonJon
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Wallingford, GB
6/15/2023 2:29am Edited Date/Time 6/15/2023 2:39am

Spotted in Vital's Pit Bits. Looks like the Pivot uses an eccentric mounting between the seatstay and rocker? Guess it's just a way of fine tuning BB height, head angle etc.

image-20230615102840-1

13
sethimus
Posts
954
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9/20/2014
Location
CH
6/15/2023 4:28am
TEAMROBOT wrote:
I agree that the Pirelli DH tires appear to be at least rideable. The Canyon/Pirelli team has some serious young racers like Dante Silva, Antoine Pierron...

I agree that the Pirelli DH tires appear to be at least rideable. The Canyon/Pirelli team has some serious young racers like Dante Silva, Antoine Pierron, and Loris Revelli who are consistently getting top 30 results on the Pirellis.

Regarding what's inside the racers tires- who knows? I wonder the same thing about the new Conti's, because in my mind there's no way a 1200 gram 29" DH tire is winning Snowshoe or Hardline or Lenzerheide or even getting to the bottom of the track with air in it. Meanwhile Minnaar got two flats this weekend running 1400 gram Maxxis tires, or even heavier if he's running the prototype "Breaker" pinch flat barrier in them. With Michelin and Schwalbe getting good results by moving up to 1500 gram DH casings, and with 1300-1400 DD and DH casing Maxxis tires serving as the norm on the EWS, I think the stock 1200 gram Conti tires are pretty unbelievable as World Cup DH tires. But who knows.

my kryto fr dh was around 1350g

1
matmattmatthew
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406
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Location
Fresh Prince of Bel Air, MD, USA
6/15/2023 7:15am Edited Date/Time 6/15/2023 7:19am
sspomer wrote:
pit bits vid from leogang    

pit bits vid from leogang

 

 

Just noticed that on Loris's bike, he's running the new Sram brakes with a 180mm rear rotor (Does he always run a 180 rear?).  Or do we think that's a track specific change or possibly the new brakes so powerful that he can drop down in rotor size?  

I remember when the original XT 4 pistons came out, they were so much more powerful than riders were used to that mechanics would sometimes put different substances on the rotors in an effort to make them have less "bite."

1
6/15/2023 8:17am

Interesting how many new tires are popping up right now and in the last year or so. Now the Schwalbe Tacky Chan and a new Michelin DH 16 as well:

… das DH 16-Modell ist doch seit 10 Jahren ausgestorben?

Evil96
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875
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Portogruaro, VE, IT
6/15/2023 8:17am

Schermata 2023-06-15 alle 17.14.56.png?VersionId=ZHWX.1egdcvySXcVq7a

 i guess we're expecting a couple tyres from Schwalbe, the Hunting Holly and the Tacky Chan, about the first one the Schwalbe guys at the Bike Festival told me already 2 months ago "wait a couple weeks"

2
Mbarosko
Posts
14
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7/21/2011
Location
Mesa, AZ, USA
6/15/2023 8:20am
RonJon wrote:
Spotted in Vital's Pit Bits. Looks like the Pivot uses an eccentric mounting between the seatstay and rocker? Guess it's just a way of fine tuning...

Spotted in Vital's Pit Bits. Looks like the Pivot uses an eccentric mounting between the seatstay and rocker? Guess it's just a way of fine tuning BB height, head angle etc.

image-20230615102840-1

Same system that is run on their other bikes like the Switchblade and Firebird. Allows for adjustment of head angle/bb height

 

flippy.png?VersionId=7n7upa J1eofjOHTsrJf 

 

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