9 Best Bikes Under $400 of 2025

The Sunny Health & Fitness Pro II is a game-changer for budget-conscious riders who crave a road-like cycling experience at home. With a 40-pound flywheel, this bike delivers unmatched momentum and smoothness in its price range, making for a high-inertia ride that mimics outdoor pedaling. The dual felt pad resistance system provides precise control, while the pulse sensor and advanced performance monitor track seven key metrics—ideal for users serious about progress tracking without needing smart app integration.

In real-world testing, the Pro II shines during moderate to intense cardio sessions. Its silent belt drive keeps noise levels minimal, perfect for apartment dwellers or early-morning workouts. The flywheel’s heft ensures consistent momentum, even when resistance increases, though the friction-based system requires occasional pad adjustments. At 41” x 22”, it’s not the most compact, but transportation wheels make storage manageable. While it lacks Bluetooth or app connectivity, the free SunnyFit app access adds surprising value with scenic rides and trainer-led workouts.

Compared to the Merach or YOSUDA models, the Pro II trades high-tech features for raw mechanical performance and durability. It’s best suited for users who prioritize physical resistance feel and flywheel weight over digital immersion. For those wanting a no-nonsense, heavy-duty indoor bike under $150, the Pro II outperforms expectations—offering stability and ride quality that surpass its modest price tag when stacked against feature-heavy but mechanically lighter competitors.

The KRIDDO Toddler Balance Bike is a thoughtfully engineered starter bike that turns first rides into confidence-building adventures. Designed for kids aged 2 to 5 years, it features a sturdy carbon-steel frame that supports up to 110 lbs—making it durable enough to grow with your child. The extra-thick all-terrain tires offer excellent grip on grass, gravel, and pavement, ensuring wobble-free starts and stable glides, which is crucial for developing balance and coordination.

During real-world use, the KRIDDO bike proves highly adaptable and safe. The soft rubber handlebar grips and PU seat reduce fatigue, while the wide frame enhances stability for wobbly beginners. Parents will appreciate the adjustable seat and handlebars, which accommodate growth spurts without needing tools. The puncture-resistant tires perform well across surfaces, though they can feel stiff on rough concrete. One standout feature is the customizable plate—kids love personalizing their ride, which boosts engagement and excitement.

Compared to the SEREED model, KRIDDO holds its own with similar adjustability and safety, but edges ahead with its aggressive tire tread for outdoor exploration. However, it lacks tool-free adjustments, making mid-season tweaks slightly slower. It’s ideal for active toddlers who spend time on uneven terrain and parents seeking a long-lasting, safe first bike. When weighed against other toddler models under $50, KRIDDO offers better tire performance and build quality, making it a top pick for outdoor readiness.

The Pleny Folding Exercise Bike is a clever space-saving solution that packs five workout functions into one compact frame—perfect for small apartments and multi-use home gyms. Its magnetic resistance system with a 6.6-pound flywheel delivers a smooth, whisper-quiet ride, while the integrated resistance bands expand its utility for upper-body training, stretching, and rowing motions. This hybrid functionality makes it stand out as a true all-in-one fitness tool under $110.

In practice, the Pleny bike performs reliably for low to moderate-intensity cardio. The LCD monitor tracks heart rate and key metrics, and the padded backrest adds comfort during longer sessions—rare at this price point. The foldable X-frame reduces storage space to just 20” x 20”, and transport wheels make moving it effortless. However, the flywheel is lighter than premium models, so high-cadence spinning feels less fluid, and resistance bands are basic—great for light toning but not serious strength work.

Against the Goimu 5-in-1, Pleny offers similar versatility and comfort but with a slightly less refined resistance system. It’s best for casual exercisers and beginners who want full-body workouts without clutter. While it can’t match the ride feel of bikes with 30+ lb flywheels, its 5-in-1 design and back support deliver exceptional utility for the cost—making it a smarter choice than single-purpose bikes when space and budget are tight.

The Goimu 5-in-1 Folding Exercise Bike is a budget-friendly powerhouse that blends comfort, stability, and versatility into a sleek, modern design. With a 16-level magnetic resistance system and X-frame construction, it supports up to 330 lbs and delivers a smooth, silent ride ideal for seniors and rehab users. The 2025 upgraded seat and ergonomic handlebars provide exceptional comfort, making it a standout for long-duration, low-impact workouts.

Real-world testing shows the Goimu excels in daily consistency and ease of use. The foldable design and transport wheels make storage a breeze, while the LCD display tracks heart rate, time, and calories accurately. Resistance shifts are precise and quiet, though the 5.5-pound flywheel limits high-speed realism compared to heavier models. It’s perfect for light cardio, recovery rides, or strength circuits with resistance bands. Setup takes under 30 minutes thanks to clear instructions and pre-assembled parts.

Compared to the Pleny model, Goimu offers more resistance levels and a more refined build, but lacks integrated back support. It’s best for older adults and fitness newbies who value quiet operation and joint-friendly workouts. When stacked against other sub-$130 bikes, Goimu wins on design, comfort, and stability—delivering a premium feel without the premium price, especially for those prioritizing low-impact fitness and space efficiency.

The YOSUDA Exercise Bike is a smart, performance-driven machine that bridges the gap between affordability and digital fitness immersion. With a 30-pound flywheel and belt drive system, it delivers a smooth, quiet ride that handles everything from steady-state cardio to HIIT sprints. The exclusive FED Fitness app and Bluetooth connectivity allow riders to join interactive classes and virtual races, transforming solo workouts into engaging challenges.

In real-world use, the YOSUDA shines for tech-savvy users and weight-loss seekers. The spring-loaded seat reduces joint impact, and four-way seat plus two-way handlebar adjustments ensure a custom fit for riders 4’8” to 6’1”. The tablet holder keeps entertainment within reach, and the instant-stop brake adds safety during intense intervals. While the app experience is robust, some users report occasional Bluetooth pairing hiccups. The cage pedals prevent foot slippage but feel clunky compared to clipless options.

Versus the Merach, YOSUDA offers similar app features and flywheel weight but with a less rigid frame and fewer resistance levels. It’s ideal for intermediate riders wanting smart training without spending $300+. For those focused on app-based motivation and ride quality, YOSUDA delivers excellent value—balancing digital engagement and mechanical performance better than most under $250.

The SEREED Toddler Balance Bike is a parent-friendly dream thanks to its true tool-free adjustment system—a rare and valuable feature in this category. Designed for kids 2–5 years old, it allows instant seat and handlebar height changes with quick-release levers, making it easy to adapt as your child grows. The 12.6–17.1” seat range fits most toddlers, and the soft saddle and rubber grips ensure comfort during learning sessions.

On real-world terrain, the SEREED bike delivers smooth, quiet glides thanks to its EVA foam airless tires, which never go flat and won’t scratch floors—perfect for indoor and outdoor use. The 7.8 lb weight makes it easy for kids to maneuver, and the customizable plate adds fun and ownership. However, the EVA tires lack traction on wet grass or gravel, making them less ideal for rugged outdoor play. The footrest pad encourages proper riding posture, helping kids transition to pedal bikes faster.

Compared to KRIDDO, SEREED wins on adjustability and indoor safety, but loses on outdoor grip and tire durability. It’s best for younger toddlers and indoor-first families who want a lightweight, hassle-free balance bike. When judged on convenience and ease of use, SEREED’s tool-free design and flat-proof tires make it a top contender for urban homes, outperforming heavier, tool-dependent models in practicality and portability.

The Merach Exercise Bike is the undisputed champion of all-around performance in the sub-$400 category, blending commercial-grade build, smart tech, and family-friendly design into one seamless package. Its inverted triangle frame with 2.00mm steel offers 40% more stability than standard bikes, while the whisper-quiet magnetic resistance (under 25dB) ensures peaceful workouts. With 0–100% micro-adjustable resistance, it caters to every fitness level, from rehab to sprint training.

In real-world testing, Merach delivers a studio-quality ride. The industrial-grade bearings and cast iron flywheel eliminate noise and vibration, and Bluetooth syncs seamlessly with Merach, Zwift, and KINOMAP apps. The dumbbell rack and dual water bottle holders encourage full-body workouts, and the 4-way seat and 2-way handles fit riders 4’8” to 6’2”. Assembly is a breeze—80% pre-built and ready in 30 minutes. The only downside? The 300 lb weight limit is slightly below some competitors.

Against YOSUDA, Merach offers superior frame rigidity, quieter operation, and better app integration. It’s ideal for serious home cyclists and families wanting a durable, evolving fitness hub. When compared to other bikes under $250, Merach justifies its price with engineering precision and long-term value—making it the best overall investment for performance, comfort, and smart training.

The MERACH Recumbent Exercise Bike is a luxurious, comfort-first machine designed for seniors, rehab users, and anyone seeking low-impact, high-comfort cardio. Its ergonomic mesh-back seat and 8-position recline deliver clinic-level support, reducing lower back strain during long sessions. The 8-level car-style resistance lever makes intensity changes effortless—perfect for users with limited mobility or arthritis.

In practice, this bike excels in quiet, joint-friendly workouts. The 6.6-pound perimeter-weighted flywheel and dual-belt drive produce a smooth, silent glide, ideal for living rooms or shared spaces. The frosted non-slip handlebars enhance grip, and heart rate sensors ensure safe pacing. The LCD display and iPad holder keep users engaged with shows or the FantomFite app, turning exercise into entertainment. At 84.9 lbs, it’s heavy, but 80% pre-assembled simplifies setup.

Compared to upright models like YOSUDA, this recumbent prioritizes posture and comfort over intensity. It’s best for older adults and injury recovery where spine support is critical. While it lacks the aggressive training potential of spin bikes, its targeted ergonomics and app integration make it the best choice for sustainable, pain-free fitness—outperforming most recumbents under $350 in build quality and user experience.

The CURSOR FITNESS Exercise Bike is the quietest ride in its class, engineered for users who demand silent, distraction-free workouts in shared living spaces. Its advanced belt drive system operates at near-inaudible levels—ideal for early mornings or late nights—while the reinforced steel frame supports up to 300 lbs with zero wobble. The micro-adjustable resistance knob allows seamless transitions from warm-up to sprint, making it perfect for HIIT and interval training.

Real-world testing confirms its superior stability and comfort. The 4-way adjustable seat (7.9” vertical range) and 5-level handlebar fit riders from 4’8” to 6’5”, accommodating a wider range than most. The extra-comfort seat reduces sit-bone pressure, and the backlit LCD clearly displays time, speed, and calories. Setup takes under 30 minutes with tool-free assembly, and front transport wheels make storage easy. However, it lacks app-guided training, limiting digital engagement.

Versus Merach, CURSOR wins on noise reduction and ease of assembly, but loses on smart features and resistance range. It’s best for urban dwellers and noise-sensitive households who want a no-frills, high-comfort spin bike. For those prioritizing peaceful operation and broad adjustability, CURSOR delivers best-in-class quietness and ride quality—making it the top pick for silent, solo training under $250.