Horizon Fitness CST4.5 Treadmill Horizon Fitness Updated September 16, 2021 19:48 For the 2006 Horizon Fitness CST4.5 Owner's Guide, please click here. For the 2006 Horizon Fitness CST4.5 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 Horizon Fitness CST4 Treadmill Horizon Fitness 2019 7.8AT-02 Treadmill How to Replace the Running Belt and Deck on a Treadmill. E1 Error Message Horizon Fitness CT5.4 Treadmill Comments 0 comments Please sign in to leave a comment.