SOLE TT8 vs ST90 Treadmill Comparison 2025 | Feature, Pros & Cons

Key Takeaways

• The SOLE TT8 and ST90 are built for serious training—but each one is designed for a different kind of runner.
• Need incline, decline, and power? The TT8 is your go-to for outdoor-style training + cushioned comfort.
• Prefer a smooth, joint-friendly run? The ST90’s slat belt delivers a track-like feel with low impact.
• Our SOLE treadmills are built to keep up with you—commercial-grade durability, high weight capacity, and a rock-solid warranty.

SOLE TT8 vs. ST90: Which One’s Your Perfect Match?

The TT8 brings incline, decline, and serious power—built for intense runs + outdoor-style training. The ST90? A next-level slat belt design for a smooth, joint-friendly ride that feels like running on air.

Need a high-performance beast or a game-changing slat belt experience? Let’s break it down so you can find your perfect fit—no guesswork needed.

SOLE TT8 vs. ST90: Quick Breakdown

Note: The prices mentioned above are based on the information provided at the time of writing and subject to change over time and across different locations.

Speed, endurance, and incline variety—the TT8 is built for outdoor-style training.

SOLE TT8 vs. ST90: Motor & Running Performance

• The TT8 wins for power + versatility. With a 4.0 HP motor, it can handle high-intensity runs, interval sprints, and long-distance training.
• The ST90 uses a 2.0 HP AC motor for consistent speed + stability—perfect for users who prefer a steady, low-impact workout​.

SOLE TT8 vs. ST90: Comfort & Running Surface

• The TT8’s Cushion Flex Whisper Deck reduces joint impact by up to 40%—making it easier on your knees + ankles​.
• The ST90 flips the script with its slat belt design—built for better traction, less friction, and a super-smooth run that mimics real track conditions.

SOLE TT8 vs. ST90: Weight Capacity & Foldability

• Both the TT8 + ST90 support users up to 400 lbs, offering rock-solid stability + long-term durability. These treadmills are built to last—but they don’t fold.
• If space-saving is a priority, check out our foldable models. But if you’re after commercial-grade toughness, the TT8 and ST90 deliver.

Prefer a steady climb? The ST90’s incline levels bring the resistance.

SOLE TT8 vs. ST90: Incline, Decline & Hill Training

• Need incline + decline for outdoor-style training? TT8 takes the cake. With 15 incline + 6 decline levels, it simulates outdoor terrain—great for hill training, endurance workouts, and muscle activation​.
• The ST90 also has a 15-level incline, but no decline option. If you don’t need decline training, the ST90 still provides solid incline variety—plus, its slat belt design delivers a smooth, track-like feel.

SOLE TT8 vs. ST90: Tech & Connectivity

• Both the TT8 + ST90 come with 15.6” touchscreens, built-in Bluetooth speakers, preloaded apps, and SOLE+ App integration​ ​.
• Both have wireless device charging and are compatible with Kinomap for virtual training.

Pros & Cons: Which One Should You Buy?

SOLE TT8

Pros:

• Powerful 4.0 HP motor for intense workouts.
• Incline + decline options for realistic training.
• Cushioned deck reduces joint strain.

Cons:

• Non-folding design.
• Bigger build—larger than the ST90.

SOLE ST90

Pros:

• Designed for smooth, low-impact running.
• Smaller footprint—fits better in compact spaces.
• Slat belt mimics real track conditions for a more natural run.

Cons:

• Higher price tag ($3,999.99).
• No decline function—so no downhill training.

More incline, more cushioning—go TT8 for outdoor-style workouts.

So, Which Treadmill Wins for You?

Both treadmills bring top-tier performance, but the best fit comes down to your training style.

• Pick the TT8 if you need a powerful motor, incline/decline training + joint cushioning.
• Choose ST90 if you prefer a smooth, low-impact run with a high-tech slat belt design.

Either way you’re getting a beast of a treadmill!

Level Up Your Training with SOLE

At SOLE, we use commercial-grade steel frames + powerful motors for all our treadmills—so they can handle every sprint, jog, and incline push.

Plus, enjoy lifetime frame + motor coverage—because your treadmill should go the distance, just like you.

Your fitness goals won’t wait. Neither should you. Pick your treadmill and start making moves today!

Frequently Asked Questions (FAQ)

What are the main differences between the SOLE TT8 and ST90?

The SOLE TT8 has a 4.0 HP motor, incline/decline options, and a cushioned deck for joint support—ideal for intense, outdoor-style training. The ST90 has a 2.0 HP AC motor and a slat belt for a smooth, low-impact, track-like run.

Whichever treadmill fits your style, SOLE has you covered. Check out our TT8 and ST90 today!

Which treadmill is better for high-intensity workouts?

The SOLE TT8 is better for high-intensity training—thanks to its 4.0 HP motor, incline/decline options, and cushioned deck. The ST90’s 2.0 HP AC motor is built for steady-state, low-impact running rather than intense workouts.

Do these treadmills have decline settings?

The SOLE TT8 has 6 decline levels—great for realistic downhill training. The ST90 doesn’t have decline settings.

Which treadmill offers better cushioning for runners?

The SOLE TT8 has better cushioning with its Cushion Flex Whisper Deck—absorbing up to 40% of impact. The ST90’s slat belt gives a track-like running feel but doesn’t offer the same level of cushioning.