Horizon Fitness T800 Treadmill Horizon Fitness October 05, 2021 18:45 For the 2008 Horizon Fitness T800 Owner's Guide, please click here. For the 2008 Horizon Fitness T800 Exploded Diagram, please click here. Was this article helpful? Yes No 0 out of 0 found this helpful Have more questions? Submit a request Comments 0 comments Please sign in to leave a comment.