From Vital MTB:

“The bike’s 110mm of travel is delivered via a new Binary Link suspension system, which Redline says allows them to optimize pedaling efficiency. The majority of the bike’s travel pivots around the lower link, but the upper link is engaged in the final portion of travel to allow the effective pivot to follow the chainline. The secondary link is said to remove the flex and unwanted stress between the stays found in most single pivot designs, and it allowed them to eliminate the brakejack pivot commonly seen in the dropout area. The system has a linear shock rate, forward axle path, and uses sealed bearings throughout. Here it is in action: ”

Red LIne D-800 Binary Link Suspension in Motion – More Mountain Bike Videos