CBF™ focuses on designing around the Center of Curvature (CC) and balancing that with the Instant Center (IC). Until now, most suspension systems have focused solely on the IC. 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, and making the sag setting much less important. When we first rode the largely-unknown CBF system, we knew it was something special, and we knew we could make the best riding carbon mountain bikes using this magical formula.
Center of Curvature:
The Canfield brothers stumbled upon the importance of the CC after years of designing big hit, rampage ready bikes. The IC constantly shifts throuout the stroke of suspension in multi-link bikes, causing the rear wheel to depart from perfect-arc rotation known only to single-pivot bikes (which is a less than perfect design for most other suspension criteria). However, if you connect the rear axle at any point on its path with the ever-changing IC, the area where all those lines intersect for the entire range of travel is the CC. This is the “virtual pivot point” around which the rear wheel actually rotates (a fairly large area on most bikes). On most multi-link bikes, the CC changes location as the rear wheel moves through travel, sometimes over an area as large as several square feet.
Welcome the Canfield Balance Formula:
The patented CBF focuses the CC precisely in a very finite are on the chainline/top of the chainring, pointing the pedaling forces directly into the IC through the entire range of travel. This creates the most efficient yet active pedaling platform possible, completely independent of sag, travel, and both drivetrain and braking forces. We could use lots of words like “versatile, smooth, efficient, etc, or we could just suggest riding the bike to see how it feels for yourself.