Treadmill Doctor Fitness Gear 821T Treadmill Running Belt Serial TM290 Review HelpfulOwl Treadmill Belts July 6, 2018September 2, 2018Exercise & Fitness, Exercise Machine Parts & Accessories, Sports & Fitness, Sports & Outdoors, Treadmill Doctor 0 Comment This is the replacement walking belt for the Fitness Gear 821T Model Walking Belt Size