Horizon Fitness Quantum Treadmill Horizon Fitness Updated September 14, 2021 18:17 For the 2001 Horizon Fitness Quantum 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 Quantum II Treadmill Horizon Fitness Adventure 3 Treadmill How to Replace the Running Belt and Deck on a Treadmill. Horizon Fitness Paragon Treadmill Horizon Fitness T100 Treadmill Comments 0 comments Please sign in to leave a comment.