The bloodletting continues for Lance Armstrong ... the disgraced cyclist just lost THREE more huge sponsors ... including the company that sponsored his bike.

Trek Bicycles has officially ended their deal with Armstrong ... ditto for the FRS energy drink company. Anheuser-Busch has also announced it will NOT renew Lance's deal to endorse its Michelob Ultra line when it expires at the end of the year.

Of course, Lance was already fired by Nike this morning -- and hours later, his bike helmet company followed suit.