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|ProForm Boston Marathon 4.0||ProForm SMART Performance 600i|
|Motor Size||4.25CHP||2.75 CHP|
|Running Area||20” x 62”||20” x 60”|
|Weight Capacity||400 lbs||325 lbs|
|Footprint In Use (W,L,H)||37" x 64" x 74"||36.75" x 79.75" x 59.25"|
|Footprint Folded (W,L,H)||N/A||0|
|Incline Range||-6% to 20%||0% to 12%|
|Max Speed||15 MPH||12 MPH|
|Treadmill Best For||Joggers, Runners||Walkers, Joggers|
|Display||10” touchscreen||Round LED/LCD|
|PreInstalled Workout Apps||Marathon training programs||22|
|Heart Rate Monitoring||Wireless chest strap||EKG handlebar grips|
|Water bottle cubbies||No||Yes|
|Warranties||Lifetime for frame, deck, and motor, 6 years on parts and electronics, 3 years on labor||Lifetime motor and frame, 2-year parts, 1-year labor|
|Belt||2-ply commercial belt||2-ply|
|Roller Size||2.5” front and back||1.9” rear|
|Cushioning||Runners Flex™ Impact Control||ProShox™ Cushioning|
|Customer Support||As this treadmill is discontinued, the customer service is not through ProForm. Support will depend on the third-party company you purchase from||Phone, email, live chat|
|Return Policy||Depending on where you purchase this discontinues treadmill, you will be subject to their return policy||30-day money-back guarantee|
Which is better? Comparison of ProForm Boston Marathon 4.0 VS ProForm SMART Performance 600i 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.