New Replacement / Model No. StairMaster 2100 LED (210) Part Name: Walking Belt – Running Belt – Treadbelt Pre-Lubricated. 2-ply Premium. LIFETIME WARRANTY. “High Quality Belt – Fabricated in USA” “Need a custom size made belt? …we can help, contact us for more information.” Treadmill Belt Lubricant Go To Our Store Walking Belts LLC Many of our customers often ask us what is the difference between the following names: Treadmill Walking Belt, Treadmill Running Belt, Treadbelt, Treadmill Belt…and the answer is none. Treadmill Belts are often refer to as any of the names above, but the truth is that all belts can be used either for walking or running.– Walking Belts LLC