Treadmill Doctor Proform 545S Treadmill Running Belt Model# 294251 Review HelpfulOwl Treadmill Belts June 2, 2018September 2, 2018Exercise & Fitness, Exercise Machine Parts & Accessories, Sports & Fitness, Sports & Outdoors, Treadmill Doctor 0 Comment This is the replacement walking belt for the Proform 545S Treadmill Running Belt Model# 294251