Key Takeaways
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The SOLE TT8 suits users wanting incline and decline training with a connected touchscreen, while the Spirit XT685 suits those prioritizing raw stability and warranty coverage.
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Both treadmills use a 4.0 HP motor, but the SOLE TT8 adds 6 decline levels for $2,899.99 while the Spirit XT685 supports 425 lbs for $3,199.99.
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The SOLE TT8 weighs 319 lbs with WiFi, Bluetooth speakers, and free SOLE+ app access, while the Spirit XT685 weighs 278 lbs and pairs via Bluetooth FTMS for compatible apps.
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Reviewers praise the SOLE TT8's Cushion Flex Whisper Deck for reducing joint impact, while Spirit XT685 owners highlight its steel uprights and stability bar for long-term durability.
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SOLE Fitness backs the TT8 with free shipping, a 30-day risk-free trial, a lifetime frame and motor warranty, and the free SOLE+ app with no monthly subscription.
*Note: SOLE does not manufacture or sell the Spirit XT685. This is an independent review of a product for comparison purposes.
Is the SOLE TT8 or Spirit XT685 the Better Value?
Your choice between the SOLE TT8 and Spirit XT685 comes down to whether you value training variety or raw capacity more. Both treadmills share the same 4.0 HP motor and running surface, so on paper they look nearly identical. The real differences surface in the console, the incline range, and how each brand prices those extras.
What most buyers don't realize is that SOLE and Spirit come from the same parent manufacturer, so the shared motor and deck specs aren't a coincidence. The gap between them comes from how each brand chooses to spend its budget. SOLE leans into touchscreen tech and incline/decline training, while Spirit keeps things simpler and puts more into frame capacity and warranty terms.
For buyers who want incline and decline training paired with a connected touchscreen and no subscription fees, the SOLE TT8 lineup is built around exactly that kind of workout flexibility.
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SOLE TT8 Specs & Features
The SOLE TT8 is SOLE Fitness's flagship non-folding treadmill, built for users who want commercial-inspired performance at home. It combines a robust frame, premium technology, and advanced training features, making it a strong choice for serious runners and high-mileage users.
The SOLE TT8 combines premium technology and commercial-inspired construction for serious home workouts.
Motor Power & Speed Range
The SOLE TT8 is powered by a 4.0 HP motor and gives a 0.5 to 12 MPH speed range. It also features 15 incline levels and 6 decline levels, offering more workout variety than many competing treadmills by letting users simulate both uphill and downhill training.
Running Surface Dimensions
The TT8 features a spacious 22" × 60" running surface, giving runners plenty of room for a comfortable stride. It also incorporates SOLE's Cushion Flex Whisper Deck to help reduce joint impact, along with 3-inch rollers for smooth, consistent belt performance during longer workouts.
Weight Capacity & Machine Weight
The SOLE TT8 weighs 319 lbs and supports users up to 400 lbs, giving it a solid, planted feel that minimizes movement during high-speed runs. Its heavy-duty construction is designed to last through frequent training. The treadmill also measures 81” x 38” x 66”, giving it a spacious footprint designed for serious home running.
Console & Features
The treadmill includes a 15.6-inch touchscreen (1920 x 1080 resolution), built-in WiFi, Bluetooth speakers, free SOLE+ app integration, wireless device charging, and preloaded entertainment apps. It also includes 6 standard workout programs, 1 custom program, and 2 heart-rate programs, plus a phone/tablet holder and a reading rack, for a more connected and customizable workout experience.
SOLE TT8 Price Point
The SOLE TT8 is priced at $2,899.99, making it a compelling value in the premium treadmill category. It also includes a lifetime frame and motor warranty, 30-day satisfaction guarantee, free SOLE+ app access with no monthly subscription, and flexible payment options through Shop Pay, with HSA/FSA eligibility.
With its commercial-inspired build, advanced touchscreen, decline capability, and comprehensive feature set, it delivers excellent overall value for users looking for a long-term home fitness investment.
Spirit XT685 Specs & Features
The Spirit XT685 is a premium residential treadmill built for demanding home workouts and includes a U.S. light commercial warranty for eligible non-dues-paying facilities. It combines a powerful motor, spacious running deck, Bluetooth connectivity, and practical features designed for long-term performance.
The Spirit XT685 is designed for users who want a durable treadmill with reliable everyday performance. (Image source: Spirit Fitness)
Motor Power & Speed Range
The Spirit XT685 is powered by a 4.0 HP motor and offers a 0.5 to 12 MPH speed range in 0.1 MPH increments, allowing precise pace adjustments. It also features 15 levels of electronic incline, adjustable in 0.5-level increments, to add variety and intensity to workouts.
Running Surface Dimensions
The XT685 features a 22" × 60" running surface, providing ample space for walking and running. It includes a 2-ply belt with a waxed deck to reduce maintenance, a 1-inch-thick wide running deck, and a 6.9-inch step-up height for a stable running experience.
Weight Capacity & Machine Weight
The Spirit XT685 weighs approximately 277.8 lbs and supports a maximum user weight of 425 lbs, giving it a sturdy, stable feel during workouts. Its heavy-duty construction includes steel uprights and a stability bar for added durability.
Console & Features
The treadmill features a 9-inch multi-color ClearView™ display and Bluetooth connectivity for compatible fitness apps, Bluetooth audio, and heart rate accessories. It also includes built-in Bluetooth speakers, a USB charging port, a swivel-tilt tablet holder, rocker-style handlebar controls, and multiple workout programs, including Manual, Hill, Fat Burn, Cardio, Strength, Interval, Calories, and Fusion, plus two user-defined and two heart-rate programs.
Spirit XT685 Price Point
The Spirit XT685 is priced at $3,199.99, placing it in the premium home treadmill category. While it represents a higher upfront investment, it is designed for users who prioritize durability, long-term reliability, and commercial-inspired performance for consistent home training.
Spirit XT685 vs. SOLE TT8: Customer Reviews
SOLE TT8 Reviews
Users generally praise the SOLE TT8 for its solid, stable construction and comfortable running experience. Reviews also highlight its shock-absorbing deck, flatter-running belt, and built-in incline and decline options, which add versatility for runners with evolving training goals.
Spirit XT685 Reviews
Users generally praise the Spirit XT685 for its durable construction, stable performance, and reliability. Reviews also highlight its solid build quality and value, particularly for runners who prioritize dependable performance over extra console features.
How Do the SOLE TT8 & Spirit XT685 Specs Compare? Summary Table
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Feature |
SOLE TT8 |
Spirit XT685 |
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Motor |
4.0 HP |
4.0 HP |
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Speed Range |
0.5–12 MPH |
0.5–12 MPH |
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Incline/Decline |
15 incline levels, 6 decline levels |
15 incline levels |
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Running Surface |
22" × 60" with Cushion Flex Whisper Deck |
22" × 60" with 2-ply belt and waxed deck |
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Weight Capacity |
400 lbs |
425 lbs |
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Console Display |
15.6" touchscreen with WiFi and SOLE+ integration |
9" multi-color ClearView™ display with Bluetooth connectivity |
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Workout Features |
6 standard, 1 custom, and 2 heart-rate programs |
Manual, Hill, Fat Burn, Cardio, Strength, Interval, Calories, Fusion, plus user-defined and heart-rate programs |
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Additional Features |
Bluetooth speakers, wireless charging, preloaded apps |
Bluetooth speakers, USB charging, tablet holder, rocker-style controls |
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Price |
$2,899.99 |
$3,199.99 |
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Best For |
Users wanting advanced features and a premium connected workout experience |
Users prioritizing durability, stability, and long-term reliability |
The SOLE TT8 Delivers Decline Training & Touchscreen Value
Investing in durable fitness equipment can provide long-term value for dedicated home gym users.
Choosing between these two treadmills isn't about which one is objectively superior; it's about matching your workout goals to the right feature set. If incline and decline variety plus a connected console matter most, that tips the decision one way. If raw weight capacity and warranty depth matter more, it tips the other.
We built the TT8 around exactly that first scenario: commercial-grade motor power, 6 decline levels, and a 15.6-inch touchscreen backed by the free SOLE+ app. Every TT8 ships free, includes a 30-day risk-free trial, and comes with a lifetime frame and motor warranty. Shop the SOLE TT8 today to start training on your terms.
Frequently Asked Questions (FAQs)
Which treadmill is better, SOLE or Spirit?
The SOLE TT8 is the better overall choice if you want more workout versatility and premium features, while the Spirit XT685 suits buyers who prioritize durability and straightforward performance.
Is the Spirit XT685 a good treadmill?
The XT685 is a good premium treadmill with a 4.0 HP motor, a 22" × 60" running surface, a 425-lb capacity, and a durable 2-ply belt and waxed deck.
What is the price of the SOLE TT8 treadmill?
The SOLE TT8 is currently listed at $2,899.99.
What is the weight of the SOLE TT8 treadmill?
The SOLE TT8 weighs 319 lbs (unit weight). Its gross shipping weight is 367 lbs.
Is the SOLE TT8 a good treadmill?
Yes, the SOLE TT8 is a good treadmill. Its 4.0 HP motor, Cushion Flex Whisper Deck, incline and decline training, 22" × 60" running surface, and premium touchscreen make it a strong option for serious home runners.
*Disclaimer: Products and prices mentioned in this article are accurate as of the date of publication and are subject to change. Please visit the official SOLE website for the most current information.
