Dave Weagle launches new suspension system, SPLIT PIVOT
Jun 8, 2007
This week, Dave Weagle, the creator of the World Champion and internationally acclaimed dw-link suspension introduces a new system to the cycling world. The new system is called SPLIT PIVOT and features worldwide patent pending concentric dropout pivot technology never seen before. A web site dedicated to the system, www.split-pivot.com, was launched earlier in May 2007.
Dave had the following to say about the launch of the new system: “I’m thrilled to finally be able to show Split Pivot off. This has been something that I’ve worked on for quite a while, years actually, licensed to partners and talked to others behind closed doors, built prototypes, but nobody in the public has seen it yet. It’s so hard to keep something so exciting a secret for so long so I am glad that part is over. I think that riders are really going to enjoy this system. It allows for atypical pivot placement that works great for acceleration and bump absorption and the concentric dropout pivot lets me tune braking forces at the same time. Basically the Split Pivot bikes are a lot of fun to ride.”
The system lends itself to ease of manufacture, and can be engineered to build lightweight frame structures without resorting to exotic materials or tube shapes. Featuring 12mm thru axle, QR 12mm axle, or 10mm vertical QR possibilities, plenty of stock wheels fit the design.
Bottom Line: Split Pivot can be engineered to offer a ride that will make you want to be on your bike more often.
Split Pivot will be available Worldwide in late 2007 and early 2008, details on brands and models to come soon. Prototypes are out there, keep your eyes peeled!
Split Pivot, Split-Pivot.com, and Ride for fun! are pending trademarks of Split Pivot Inc. Split.Pivot@gmail.com www.split-pivot.com Ride for fun!
What is it?
Split Pivot is a worldwide patent pending suspension system for high performance bicycles, where traction, efficiency, maneuverability, and frame stiffness are important factors on the track and trail. Split Pivot’s [concentric dropout pivot] is the heart of this new design and provides performance that no single pivot can duplicate. Shaped by Dave Weagle's competition proven engineering, Split Pivot is designed to offer a ride that will make you smile.How does it work?
Split Pivot separates acceleration forces from braking forces in the suspension. The system reduces excess suspension compression due to acceleration forces, and at the same time reduces excess compression due to braking forces. Braking neutrality can be tuned independently of acceleration characteristics, and leverage rate curves can be tuned to meet the needs of the application. Shock layout can be vertical, horizontal, floating or even driven by a modifier link. The system lends itself to ease of manufacture, and can be engineered to build lightweight frame structures without resorting to exotic materials or tube shapes. Featuring 12mm thru axle, QR 12mm axle, or 10mm vertical QR possibilities, plenty of stock wheels fit the design.
Bottom Line: Split Pivot can be engineered to offer a ride that will make you want to be on your bike more often.
Split Pivot will be available Worldwide in late 2007 and early 2008, details on brands and models to come soon. Prototypes are out there, keep your eyes peeled!
Split Pivot, Split-Pivot.com, and Ride for fun! are pending trademarks of Split Pivot Inc. Split.Pivot@gmail.com www.split-pivot.com Ride for fun!
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19 Comments
- + 0
crazeed
(Jun 8, 2007 at 11:10)
how has this design not been put into production sooner? it seems likea no brainer
hey sorry if i'm wrong but I'm pretty sure before oryx bicycles got bought out that their bike used this type of suspension. If I am right then this isn't the first company to use this type of linkage. I've got a oryx spitfire 99 from the year 2004 and it has the same type of linkage!
No man, for the most part it looks like just a normal 4bar like kona's or banshee but if you look at the rear dropout the piviot is right at the axle. Normal bikes either have a pivot on the chain stay before the axle or on the seat stay above the axle. It looks good, I don't know about durability though... It seems like a lot of small brakable parts in an area where stiffness and strength are pretty important.
I don't get it yet...is the trick basically in the dropout independent from the design of your linkage? Is there any bearing in contact with the axle of the dropout?
TREK is coming out with the same thing in 08, they are calling it the active braking pivot. Pics at cyclingnews.com. Seems like a complcated way to avoid the horst link patent.
yeah, the specialized horst link patent it's a f*cking shit. patenting that, they'r stoping small companies of using it and developing it. i guess if they didn't ask for royalties everyone could use it and i'm pretty much sure that eventually another variations much better than the fsr would appear. imagine what would be like if turner had patented the 4bar linkage back in the middle of the 90's... mountainbike world would be a few steps back by now... f*ck you specialized
If the horst link hadn't been patented we'd sure be way behind we are now. The patent forces companies to really innovate instead of using the solution Specilaized has patents on.
Blaim your patent system for allowing patent control for so long, not specialized.
AFAIK, This new design is also patented (not sure if it holds any salt as it appears that some previous art exists...) so...
The current patent system is flawed, not specialized's willingness to protect their IP. More, AFAIK, they license the horst link to anyone willing to pay royalties.
Blaim your patent system for allowing patent control for so long, not specialized.
AFAIK, This new design is also patented (not sure if it holds any salt as it appears that some previous art exists...) so...
The current patent system is flawed, not specialized's willingness to protect their IP. More, AFAIK, they license the horst link to anyone willing to pay royalties.
u have a good point too, but when i said they'r stoping small companies from using it, i meant that small comp. can't afford to pay royalties, and most of the great ideas come from small companies (turner, bcd, outland, nicolai, foes, canfield bros, etc). and the fsr has been used under license for many companies like 4 instance the intense m1 wich was the best dh frame for several years and it wasn't any inovation. so the only thing this patent does it's to put big cash on specialized pockets. but you'r quite right about "forces companies to inovate" and the prove it's the new wave of new systems like the VPP and this Slip pivot which work way better than the fsr
The VPP design was around ten years ago on the outland bikes then it went away. It seems that the industry goes through these cycles of designs and all of them have their downsides. I wonder when we will see the lawill reborn like it was used on the old shwinn and yeti dh bikes.
yep and when santa cruz bought the vpp patent they allowed intense to use it too. To allow a seperate development of the system. I like that ''community of frame builders'' idea.
I would like to know how this can keep turning smoothly without actually being a type of bearing instead of what seems to me to be a bushing inside of an axle mount? Would a sealed bearing like one on a roller skate press fit be a fair comparison? Sounds viable.
To me it looks like a way to get some, but not all, benefits of the fsr system without breaking the patent. While braking the suspension will act in a similar way to the fsr absorbing the braking forces from the caliper in the seatstays. While pedaling and coasting tough the wheepath is given by the swingarm so it will act as a monopivot design. Fell free to correct me if I'm wrong. Still the marketing people will make us buy it.
Yes it has the benefits of the FSR but better for braking, the thing is that for pedaling it benefits from the Banshee's design of the swingarm (ICT or something like that) so basicly, if you want better sensitivity like the basic swingarm desing, but still get the brake seperated from the suspension like the FSR (and even better). I guess it'll show when the tests start but as i see it it's the best combo of the swingarm design and FSR/Horstlink 
sorry, all i see is a single pivot design... no change to axle path. just moved the pivot to the axle instead of teh seat or chainstay like rellinger said... don't see the benefit myself.
bearings or bushings! either way thats a s-t load of force right at the axle. Might have rear wheel play issues, blown bearings, mushroomed bushings, blah blah... very curious to see real world tests.
would be real nice if DW posted an animated model on his site to better illustrate the method of his madness.
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