Canfield Brothers Unveils Canfield Balance Formula™ Suspension Patent- Mtbr.com
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  1. #1
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    Canfield Brothers Unveils Canfield Balance Formula™ Suspension Patent

    -cbf.jpg

    We are proud to officially release the details of our long awaited Canfield Balance Formula™ suspension patent! More than seven years in development, CBF™ is designed to deliver unrivaled efficiency and performance via optimal anti-squat throughout the entire range of travel, completely independent of “sag.”

    Utilizing the parallel link design that Lance and Chris have been refining since the late ‘90s, CBF™ “balances” driveline forces by pointing them through the Center of Curvature (which the formula focuses in a very finite space on top of the chainring, while on most suspensions it migrates over an extremely large area) and into the Instant Center throughout the entire range of travel.

    -cbf-center-curvature.jpg

    LEARN MORE: VISIT THE OFFICIAL CBF™ WEBSITE

    The result is the most efficient yet active pedaling platform possible, completely independent of sag, travel and both drivetrain and braking forces.

    “Most suspension designs focus on the Instant Center,” said Chris Canfield, suspension expert and co-founder of Canfield Brothers. “And they are only efficient in a very finite part of travel when chainline forces are balanced with that point, hence the reason for recommended sag. The potential of designing around the Center of Curvature has been largely overlooked. We were so excited when locked onto its potential nearly a decade ago, that we referred to it as the ‘god spot.’”

    WATCH: ‘LIKE A DREAM’ – CBF IN ACTION ON THE CANFIELD BROTHERS RIOT



    CBF™ is already incorporated on the Balance and Riot in our line, all-mountain bikes that have been praised for their brisk acceleration and climbing ability despite being extremely capable descenders.

    “It really is the Holy Grail of suspension design,” said Chris. “Finding the Balance between smooth, active suspension travel and a firm, efficient pedaling platform is no longer the compromise it used to be. Riding is believing.”

    CBF™ BENEFITS

    -cbf-diagram-image-logo-small.jpg

    CBF™ Suspension – Patent Number US 9,061,729

    1: THE MOST EFFICIENT PEDALING AND POWER TRANSFER POSSIBLE

    CBF™ points the chainline and drive forces directly into the IC throughout 100-percent of the travel by balancing the CC over the chainring, resulting in maximum pedaling efficiency, regardless of where you are in the travel, what terrain you are on or what kind of power you’re putting down. All the power you put into the pedals propels you one direction–forward—allowing the suspension to do its job completely independent of drivetrain and braking forces.

    2: COMPLETE SEPARATION OF DRIVETRAIN AND SUSPENSION FORCES

    By Balancing the CC on the chainline, CBF™ creates an IC that can travel from a high position to low, forward to back, mirroring the rear axle and keeping the distance between the two more consistent, lessening chain-growth/pedal-kick throughout the travel. As the wheel moves up, the IC moves down, avoiding unnecessary interruptions to the pedal stroke. The chainline pivots with the suspension, around the same point, providing complete isolation of drivetrain and suspension forces for an incredibly smooth ride.

    3: SMOOTH, ACTIVE, CONTROLLED BRAKING

    CBF™ decouples suspension and braking forces, allowing the rear wheel to smoothly and efficiently track terrain even under hard braking for maximum traction and control. “Brake jack” is virtually non-existent. CBF has optimal anti-rise (80%-100%) throughout travel, preventing braking forces from causing unwanted squat or rise, maintaining favorable geometry and allowing the suspension to do its job, keeping the rider in control when it often matters most.

    4: NOT SAG DEPENDENT

    CBF™ is not sag dependent. Our formula allows the rider to set up the sag position anywhere in the travel with maximum anti-squat and pedaling efficiency. Because the chainline always points at the IC, there is no way to miss the “sweet spot” in the travel. Of course, your sag and suspension setup will still affect bump compliance and how much travel you use, but if you like to run it soft or it has not been properly set up, you won’t be giving up any pedaling efficiency. You will also maintain efficiency when climbing (a situation in which weight is shifted rearward, causing the bike to sit deeper into travel beyond the normal ideal sag position), riding downhill, through obstacles and rough terrain, or any other variables that require efficient pedaling deeper in travel.

    -The Bros
    Last edited by KillingtonVT; 07-28-2016 at 12:52 PM.

  2. #2
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    I got the email, too. Nice work, guys! Well deserved after so long.

  3. #3
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    Congrats, bros. When I was actually an engineer, I was always looking for a patent but never manged to do it.

    And the proof is in the pudding...the bikes ride great.

  4. #4
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    Agreed. Congrats on patent. and cool info.. trying to understand it all - as best I can anyway.
    Working to stomp out redundancy, I repeat, working to stomp out redundancy.

  5. #5
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    Thanks guys,

  6. #6
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    Congrats! Have a question tho - does the efficiency change with different sized chainrings? Is there an "optimum" chainring size?

    Cheers,

    G MAN
    "There's two shuttles, one to the top and one to the hospital" I LOVE this place!!!

  7. #7
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    It changes only around 5% per ring size.
    The Balance and Riot are setup perfect with the 30-32t.
    so a 34t will sit on 95% and a 28t will be at 105%....

  8. #8
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    exciting times!!
    17' Canfield Jedi 27.5" - The fast just got faster!
    15' Canfield Balance - The go to guy of the bike world!

  9. #9
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    Congratulations fellas! I can only imagine what it must feel like to finally show the world what a decade of passion can produce.

    for me as a customer, it's added a newer and higher level of appreciation of what I've felt have always been great bikes. I would never been able to put to words if ever asked, but with the unveiling I think it's provided some clarity.

    Im excited for the what the future is going to bring!

    (please future, the not so distant future, bring me a big CBF 29er that doesn't care for trails, or its builders. The only thing it cares for is its riders ablitity to comfortably get to the top and for that rider be equally responsible of destroying trails on the down)

  10. #10
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    Very cool... Congrats!!!

  11. #11
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    Nice writeup and excellent CBF website. It's good to get out there and explain this stuff. I'm confused about what's being announced, though. Isn't this the same CBF patent 09061729 granted June 23, 2015?

    I went on a bit of a patent reading spree this spring while researching for my current bike (which ended up being a Balance, of course). The '729 Canfield one was one of the more readable and interesting ones.

    What struck me a lot was how it accomplishes similar things to Tony Ellsworth's ICT patent, isolating drivetrain and suspension forces by keeping the instant center in line with the chain tension vector. Designing around the CC of the IC seems like it accomplishes a similar result to designing the IC to move in an arc that matches the chain tension. In fact, Figure 15 in the CBF patent, with "long links", looks a lot like an Ellsworth.

    Not that I think the Ellsworth design is better or first or anything. Just that CBF includes the best characteristic of ICT (among other advantages). Placing the IC way up front like Ellsworth/ICT does leaves you with a pretty shitty anti-squat curve. And, I'd rather have the Bro's geometry of course.

  12. #12
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    Awesome, congrats Lance, Chris, and crew!

    Great to read what is actually going on to make the bike feel this way, other than that sprinkling of fairy dust. Now when are the CBF stickers going to be available to purchase!?!

  13. #13
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    Congrats!

  14. #14
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    The website is great, I've learnt a lot in general.

  15. #15
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    Might as well patent something more useful, like an idler pulley on rails that can be raised to engage pseudo-chainless (Aaron Gwin Leogang) mode. Best of both worlds, more active suspension with low kickback, but still able to pedal with stable suspension when needed. Already got half the technology figured out, right?
    "The challenge is not in developing new ideas, but in escaping old ideas."

  16. #16
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    My Ellsworth Dare has no chain growth .

    Was a great bike in its time .

    It pedals no where as well as my One which is stiffer as well .

    My One has chain growth , which is easy to measure .
    Last edited by griffinsurfboard; 07-31-2016 at 08:32 PM.

  17. #17
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    Now that this is out of the way, when is a carbon FS frame coming? Giggidy...

  18. #18
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    Congratulations! I love my balance!

  19. #19
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    Lance and I are on VitalMTB from 10-2pm today answering questions.

    Forum Hot Seat: Canfield Brothers - The Hub - Mountain Biking Forums / Message Boards - Vital MTB

  20. #20
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    Carbon full squish confirmed...

    Come on boosted 150mm Riot...

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