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ProForm SMART Performance 400i VS ProForm Boston Marathon 4.0

Not sure which Treadmill is better? Compare ProForm SMART Performance 400i VS ProForm Boston Marathon 4.0and make the right choice. The table below compares the crucial specs of both models. Helpful video reviews are also provided. Once you made your choice, check the prices on Amazon!

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Appearance, Dimensions​ and Technical Details​

ProForm SMART Performance 400iProForm Boston Marathon 4.0
Motor Size2.5 CHP4.25CHP
Running Area20” by 55”20” x 62”
Weight Capacity300 lbs400 lbs
FoldingYesNo
Footprint In Use (W,L,H)35.5" x 73.25" x 59.75"37" x 64" x 74"
Footprint Folded (W,L,H)35.5” x 39” x 65.25”N/A
Incline Range 0-10%-6% to 20%
Max Speed10 MPH15 MPH
Treadmill Best For WalkersJoggers, Runners
Electrical Requirements 120V120V
Display 3” LCD10” touchscreen
PreInstalled Workout Apps 18Marathon training programs
Speakers YesYes
Fans NoYes
Heart Rate Monitoring EKG handlebar gripsWireless chest strap
USB port NoNo
Audio Jack YesYes
Water bottle cubbies YesNo
Device holder YesNo
Warranties Lifetime frame, 25-year motor, 1-year parts and laborLifetime for frame, deck, and motor, 6 years on parts and electronics, 3 years on labor
Belt 2-ply2-ply commercial belt
Roller Size 1.9” rear2.5” front and back
Cushioning ProShox™ CushioningRunners Flex™ Impact Control
Customer Support ProForm has multiple ways to provide support for their customers. There is a live chat function on their website, a help request form, phone support and email options available to answer customer questionsAs this treadmill is discontinued, the customer service is not through ProForm. Support will depend on the third-party company you purchase from
Return Policy ProForm offers a 30-day trial period which you can return your product for a full refund, minus a 10% restocking fee. If your product is damaged or defective, you do not have to pay the restocking fee.Depending on where you purchase this discontinues treadmill, you will be subject to their return policy

Review videos

Overview and Specs

Which is better? Comparison of ProForm SMART Performance 400i 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.

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