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|NordicTrack T 6.5 Si||ProForm Boston Marathon 4.0|
|Motor Size||2.6 CHP||4.25CHP|
|Running Area||20” W x 55” L||20” x 62”|
|Weight Capacity||300 lbs||400 lbs|
|Footprint In Use (W,L,H)||36” x 67.5” x 73”||37" x 64" x 74"|
|Footprint Folded (W,L,H)||N/A|
|Incline Range||0% to 10%||-6% to 20%|
|Max Speed||10 MPH||15 MPH|
|Treadmill Best For||Walking, Light Jogging||Joggers, Runners|
|Display||10” touchscreen||10” touchscreen|
|PreInstalled Workout Apps||20||Marathon training programs|
|Heart Rate Monitoring||EKG Grip Pulse||Wireless chest strap|
|Water bottle cubbies||Yes||No|
|Warranties||Lifetime frame and motor, 1-year parts and labor||Lifetime for frame, deck, and motor, 6 years on parts and electronics, 3 years on labor|
|Belt||Commercial Tread Belt||2-ply commercial belt|
|Roller Size||1.9” Non-Flex rollers||2.5” front and back|
|Cushioning||FlexSelect cushioning||Runners Flex™ Impact Control|
|Customer Support||Email, live chat, phone||As this treadmill is discontinued, the customer service is not through ProForm. Support will depend on the third-party company you purchase from|
|Return Policy||30-day trial||Depending on where you purchase this discontinues treadmill, you will be subject to their return policy|
Which is better? Comparison of NordicTrack T 6.5 Si VS ProForm Boston Marathon 4.0 treadmills. Compare the characteristics of each product and make your choice. Below you can see the most important specifications that you should check before purchase.