Horizon Fitness T54HR Treadmill Horizon Fitness Updated September 15, 2021 19:35 For the 2005 Horizon Fitness T54HR Owner's Guide, please click here. For the 2005 Horizon Fitness T54HR Exploded Diagram, please click here. Was this article helpful? Yes No 0 out of 0 found this helpful Have more questions? Submit a request Related articles Treadmill Master Reset Horizon Fitness T605 Treadmill How to Replace the Touchpad on a Treadmill How Do I Replace a Lost or Damaged Safety Key? Software and Firmware Updates Comments 0 comments Please sign in to leave a comment.