It's not about pedalling in the latest parts of travel, but about huge pedal-kickback when you whenever reach the full-travel on landing or hitting something.
new Lapierre DH bikes
- Thread starter IH8Rice
- Start date
eh, nico seems to have always been a fan of pedal-kickback, going from his v-procesz and Sunn bikes, which both had high pivots above the rather large chainring.
Also, I have previously understood that on large hits motoX riders will rev the throttle to spin the tire and prevent/reduce bottom out/impact. I'm not a moto rider so I may be wrong/mislead. There was once a bike, the astrix halo, which attempted the same mechanism. I wouldn't be surprised if there's an ounce of that thinking in this axle path...at deep travel/bottom out, massive weight will also be on the pedals, providing limited feel to the rider, but a small "blip" of the throttle to reduce impact on landing.
Just a thought...real world effects are probably nil.
Also, I have previously understood that on large hits motoX riders will rev the throttle to spin the tire and prevent/reduce bottom out/impact. I'm not a moto rider so I may be wrong/mislead. There was once a bike, the astrix halo, which attempted the same mechanism. I wouldn't be surprised if there's an ounce of that thinking in this axle path...at deep travel/bottom out, massive weight will also be on the pedals, providing limited feel to the rider, but a small "blip" of the throttle to reduce impact on landing.
Just a thought...real world effects are probably nil.
Definitely. But they aren't the only one. Commencal's new bike has a pretty high pivot, and Yeti's new 303 has a vertical axle path (so I'm told by their mechanic at Windham). Seems like a few companies are less concerned with chainstay growth these days...
Maybe Orange will go back to the 222 next...
So basically we have a dual rate change with anti-squat (using a single IC), rather than a close to linear with a standard single pivot?....
Im guessing kinda of like the original VPP - it had a pronounced sweet spot for pedaling at sag, but where it is different is that the anti squat increases through the travel rather than tapering off.. Also the chain forces pulls the wheel into the sag from topped out - eg would make for better small bump compliance as the anti-squat is minimized up to sag?
Im guessing kinda of like the original VPP - it had a pronounced sweet spot for pedaling at sag, but where it is different is that the anti squat increases through the travel rather than tapering off.. Also the chain forces pulls the wheel into the sag from topped out - eg would make for better small bump compliance as the anti-squat is minimized up to sag?
Not Sure for the rest of the world but we have our pricing:
DH 720 $5499cdn
DH 920 $7799cdn
Frame only with RC4 TBD but likely $2800cdn give or take
ps- you're about to hear about another great signing to Lapierre, that DH team is going to be stacked!
DH 720 $5499cdn
DH 920 $7799cdn
Frame only with RC4 TBD but likely $2800cdn give or take
ps- you're about to hear about another great signing to Lapierre, that DH team is going to be stacked!
ps- you're about to hear about another great signing to Lapierre, that DH team is going to be stacked![/QUOTE]
Like?
Like?
Is it me or does the frame use the press in bottom bracket bearings?
has anyone taken into account the fact that the swingarm may well move further in the video than a shock would allow? if that's the case the last bit of bb movement wouldn't be so relevant.
The commencal is using pressed in cups next year too - not so sure i'm keen on the idea myself
The commencal is using pressed in cups next year too - not so sure i'm keen on the idea myself
Solution to a problem that doesn't exist!
press fit bb's allow for manufacturer to design a wider stronger bb, therefore a stiffer interface and therefore less wear/tear/stress on the bb bearing vs an external system
its proven there is plenty of empirical data to back it up, many of the top road bikes in the world (Trek Madone, Eddy Merckx, Lapierre, BMC etc) all use it now because of the above mentioned reasons, both bb86 and bb90
Like?[/QUOTE]
you'll just have to wait, information isn't public yet, but i thought it was a nice little nugget
+ for press in BB
- for that much chain growth.
But I've been totally wrong in the rest of this thread.
I'm guessing this bike may(still doubtful)bennefit the super humans at the top of the game, but not the rest of us. I'm struggling to see any bennefits. COG moving forward, hmmm, why not just ahve a higher more bump compliant pivot? What head angle's on the bike? Is moving BB to help weigh the front? I'm lost.
- for that much chain growth.
But I've been totally wrong in the rest of this thread.
I'm guessing this bike may(still doubtful)bennefit the super humans at the top of the game, but not the rest of us. I'm struggling to see any bennefits. COG moving forward, hmmm, why not just ahve a higher more bump compliant pivot? What head angle's on the bike? Is moving BB to help weigh the front? I'm lost.
- for press-fit BB
- for they killed advantages of floatingBB by making it move forward
I think pressfit BB is another case when roadies and MTB bikes shall for the sake of reliability develope other way. And LP is example of its own. The first model year of their Spicy/Zesty models have problems with pressfitBB, as the BB shell cracks . I find the idea of bearings completly housed in BB shell more natural than external bearings sitting on few milimeter of thread. Obviously, some addition must be done to have the pressfit design reliable in MTB. MTB is not about fluent constant pedalling.
- for they killed advantages of floatingBB by making it move forward
I think pressfit BB is another case when roadies and MTB bikes shall for the sake of reliability develope other way. And LP is example of its own. The first model year of their Spicy/Zesty models have problems with pressfitBB, as the BB shell cracks . I find the idea of bearings completly housed in BB shell more natural than external bearings sitting on few milimeter of thread. Obviously, some addition must be done to have the pressfit design reliable in MTB. MTB is not about fluent constant pedalling.
as is the new Demo 8
Pedaling a road bike is nothing like pedaling a DH bike.
Reread what you quoted. It's has nothing to do with how they pedal, rather the gains in strength and wear that can be achieved.
The part where Trek, BMC, et all use press fit to make the BB stiffer?
Who is complaining about stiffness from the bottom bracket area of DH bikes at the moment?
Couldn't the press fit be a cheaper and or lighter alternative too. Yes, there is hype in the bike industry but I have a feeling there is some good reasoning behind this.
How does it work?
The idea is simple: a floating bb attached to the front triangle and linked to the rear swing arm, everything functioning in synchronization BUT independently
- the pivot point is positioned to eliminate pedal bob while on a flat surface (calculated using a mathematical model and confirmed in field using telemetrics)
- the interaction between the floating bb and the rear swing arm creates an equilibrium point (sag position)
- when there is a rock (for example), the movement of the floating bb brings the rear swing are back to its sag position ( approximately 5mm at max, imperceptible)
- when the rider pedals, this puls the chain tight: which provokes the movement of the bb AND because the bb is connected to the the rear swing arm, the swing arm is forced back to its equilibrium (sag position), thereby eliminating pedal induced bob
The idea is simple: a floating bb attached to the front triangle and linked to the rear swing arm, everything functioning in synchronization BUT independently
- the pivot point is positioned to eliminate pedal bob while on a flat surface (calculated using a mathematical model and confirmed in field using telemetrics)
- the interaction between the floating bb and the rear swing arm creates an equilibrium point (sag position)
- when there is a rock (for example), the movement of the floating bb brings the rear swing are back to its sag position ( approximately 5mm at max, imperceptible)
- when the rider pedals, this puls the chain tight: which provokes the movement of the bb AND because the bb is connected to the the rear swing arm, the swing arm is forced back to its equilibrium (sag position), thereby eliminating pedal induced bob
I know a load of over-complicated bollox when I see it
Did Jim Busby design this bike?
haha, no but he certainly is one of the best at what he does
BOS had a small hand in it through Nico but overwhelmingly it was the Lapierre crew, mostly Remi Gribaudo
lemme guess, you ride a orange?
I hope they last longer than the ones I saw this year under a certain team. 1 race weekend = 1 frame per rider. They usually had small cracks by day 2.
Maybe its just like the DT swiss rims that were made to bend to avoid puncture. The soft alu is extra suspension technology
