Isolator and suspension assembly for riding equipment

A biasing element for providing suspension between a pivoting component and a support area of a riding outdoor power equipment vehicle, the biasing element comprising:

• a body compressible between a default unbiased orientation and a compressed orientation;
• the body having at least three annular portions, the at least three annular portions including a radially outer main portion circumscribing a pair of radially inner portions, the pair of radially inner portions being movable during operational engagement between
• the default unbiased orientation in which the radially inner portions are vertically spaced apart from one another, and have a gap extending fully between one another, and
• the compressed orientation in which the radially inner portions are engaged with one another;
• at least one retaining member projecting outwardly from the outer main portion for allowing fixing of the body;
• and
• wherein the resulting biasing element
• may undergo compression of at least 1.2 inches and produces a force in response to said compression,
• produces a force to compression rate that increases with increasing compression, and wherein the force to compression rate increases from at least 227 lb/in to at least 500 lb/in as the biasing element undergoes compression from 0 to 1.2 inches.