This Is The Replacement Motor Belt For The Proform XP 550s Treadmill. For Model Number: 296751, Sears Model: 831.296751. Fits the following models: Epic: 400 MX - EPTL814041. Gold's Gym: Advantage - GGTL12921, VX 5000 - GGTL817040. Healthrider: A60 - HRTL17980, A60 - HRTL17981, A90 - HRTL19980, A90 - HRTL19981, H500 - HATL512050, L600I - HRT12920, L700I - HRT15920, S700I - HRTL16990, S700I - HRTL16991, S700I - HRTL16992, S700I - HRTL16993, S700XI - HRTL16900, S900I - HRTL19990, S900I - HRTL19991, S900I - HRTL20010, S900XI - HRTL19900, Soft Strider LE - HRTL26970, Soft Strider S700xi - HRTL16909, T800i - HRTL16940. Image: 10.2QI/10.2QL - IMTL11990, 10.2QI/10.2QL - IMTL11991, 10.2QI/10.2QL - IMTL11992, 10.2QI/10.2QL - IMTL11993, 10.2QI/10.2QL - IMTL11994, 10.4QI - 831.299350, 10.4QI - 831.299351, 10.4QI - IMTL13991, 10.4QI - IMTL13992, 10.4QL - IMTL12900, 10.4QL - IMTL12901, 10.4QL - IMTL12902, 12.0Q - IMTL07610, 12.0Q - IMTL07611, 973 - IM973030, ADVANCED 1400 - IMTL079050, ADVANCED 1400 - IMTL079051, ADVANCED 3000 - IMTL159050, ADVANCED 3000 - IMTL159051. Nordictrack: C500 - NETL158150, X10 Incline Trainer - NTK19940, X5 Incline Trainer - 831.295150, X5 Incline Trainer - 831.295151, X5 Incline Trainer - 831.305040, X5 Incline Trainer - NTK14940, X5 Incline Trainer - NTK14941.