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|ProForm Boston Marathon 4.0||NordicTrack X22i Incline|
|Motor Size||4.25CHP||4.25 CHP|
|Running Area||20” x 62”||22” x 60”|
|Weight Capacity||400 lbs||300 lbs|
|Footprint In Use (W,L,H)||37" x 64" x 74"||39.6" x 70.2" x 71.6"|
|Footprint Folded (W,L,H)||N/A||0|
|Incline Range||-6% to 20%||-6% to 40%|
|Max Speed||15 MPH||12 MPH|
|Treadmill Best For||Joggers, Runners||Walkers, Joggers, Runners|
|Display||10” touchscreen||22” HD touchscreen|
|PreInstalled Workout Apps||Marathon training programs||44|
|Heart Rate Monitoring||Wireless chest strap||EKG handlebar grips, chest strap|
|Water bottle cubbies||No||Yes|
|Warranties||Lifetime for frame, deck, and motor, 6 years on parts and electronics, 3 years on labor||Lifetime frame, deck, and motor, 6-year electronics and parts, 3-year labor|
|Belt||2-ply commercial belt||2-ply, commercial non-stretch|
|Roller Size||2.5” front and back||2.5”|
|Cushioning||Runners Flex™ Impact Control||Reflex™ 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|
Which is better? Comparison of ProForm Boston Marathon 4.0 VS NordicTrack X22i Incline 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.