Fitnex B55SG Upright Exercise Bike

The B55SG Upright Exercise Bike is designed for smooth, efficient cardio workouts in both home and light commercial environments. Combining ergonomic comfort, advanced technology, and self-powered convenience, this upright bike delivers a reliable and engaging ride for users of all fitness levels.

With 16 levels of ECB resistance and 22 built-in programs—including heart rate and watt control—the B55SG makes it easy to customize your workout experience. The intuitive 5.5” backlit LCD console keeps you informed with real-time data, while thoughtful design features like a built-in water bottle holder, accessory storage, and tower rack add convenience and organization to your training sessions.

Whether you're focused on endurance, fat-burning, or performance improvement, this upright bike provides the structure, comfort, and technology you need to meet your goals.

Key Features

Resistance System

• Utilizes a smooth and silent ECB (Eddy Current Brake) resistance system, delivering maintenance-free performance and responsive resistance transitions. Ideal for everything from gentle recovery rides to challenging hill simulations.

Resistance Levels

• 16 digitally controlled resistance levels, giving users the flexibility to adjust intensity at the push of a button. Whether you're just starting out or training at an advanced level, the B55SG adapts to your fitness needs.

Power Supply

• Self-generating power system means no cords or external power sources required. The bike generates power as you pedal, offering eco-conscious performance and the freedom to place it anywhere in your space.

Workout Programs

• A total of 22 preloaded training programs to keep workouts varied and goal-focused:
  • 12 Preset Programs (P1–P12)
  • 4 Heart Rate Control (HRC) Programs
  • 4 User-defined Custom Programs
  • 1 Recovery Program to track heart rate recovery
  • 1 Watt Control Program for performance or rehab-based training

Display Console

• A clear and easy-to-read 5.5” backlit LCD display tracks all essential workout metrics in real-time, including:
  • Time
  • Distance
  • RPM
  • Speed
  • Resistance Level
  • Pulse
  • Calories burned
  • Watt output

Heart Rate Monitoring

• Dual monitoring capability with built-in contact sensors and wireless heart rate receiver compatibility (strap sold separately), allowing you to stay in your ideal training zone with accuracy and ease.

Comfort & Convenience Features

• Self-balancing pedals with adjustable straps for a secure and ergonomic ride
• Vertical seat adjustment to accommodate a wide range of user heights
• Integrated water bottle holder to keep hydration close at hand
• Accessory storage with built-in towel rack for easy access to workout essentials
• Transport wheels for simple relocation and storage after use

Dimensions and Weight

Assembled Dimensions

• 41” (Length) x 24” (Width) x 56” (Height)
• Compact footprint makes it an excellent fit for home gyms, apartments, or multi-user fitness spaces, while still offering a sturdy and spacious ride experience.

Maximum User Weight

• Built to support users up to 300 lbs (136 kg)
• This is thanks to its solid frame and high-quality components designed for durability and stability.

Power & Watt Output

• Self-powered system generates 30–350 watts at 30–90 RPM
• Making it ideal for a wide range of training goals—from gentle rehab workouts to intense power-based sessions.