Treadmill Doctor Lifestyler Expanse 500 Treadmill Running Belt Model# 297431 Review HelpfulOwl Treadmill Belts June 4, 2018September 2, 2018Exercise & Fitness, Exercise Machine Parts & Accessories, Sports & Fitness, Sports & Outdoors, Treadmill Doctor 0 Comment This is the replacement walking belt for the Lifestyler Expanse 500 Model 297431 Walking Belt Size 14×104