Horizon Fitness Quantum II Treadmill Horizon Fitness Updated September 14, 2021 18:50 For the 2002 Horizon Fitness Quantum II Assembly Guide, please click here. For the 2002 Horizon Fitness Quantum II 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 Treadmill How to Replace the Running Belt and Deck on a Treadmill. How to Fix a Treadmill that is Stopping and Starting How to Calibrate a Treadmill How Are Products Serviced in the Marketplace? Comments 0 comments Please sign in to leave a comment.