US Patent 7216883 Bicycle with rear suspension

A bicycle frame set comprising a main frame and a rear wheel suspension system. The rear wheel suspension system comprises a first link member with an upper end pivotally connected to a seat tube of the main frame at a link pivot point located rearward of an axis extending between a bottom bracket of the main frame and an intersection of the seat tube and a top tube of the main frame. The first link member has a displaceable lower end pivotable about the link pivot point. The swing-arm is pivotally interconnected with the main frame proximate the bottom bracket and has a rearward end adapted to engage a rear wheel axle. The swing-arm is pivotally connected with the first link member at a point thereon intermediate the upper and lower ends. A shock absorber is affixed between the main frame and the lower end of the first link member.