Treadmill Doctor Healthrider S600 Treadmill Running Belt Model# HRTL14981 Review HelpfulOwl Treadmill Belts July 11, 2018September 2, 2018Exercise & Fitness, Exercise Machine Parts & Accessories, Sports & Fitness, Sports & Outdoors, Treadmill Doctor 0 Comment This is the replacement walking belt for the Healthrider S600 Model HRTL14981 Walking Belt Size 19×124