The Giant Reign E+ is a powerful enduro electric mountain bike built for riders who crave aggressive descents, technical climbs, and all-day trail adventures. With its 48-volt system, full-suspension geometry, and trail-tuned components, this e-MTB is designed to push boundaries and redefine what’s possible on rugged terrain. Whether you’re bombing down alpine singletrack or navigating rocky switchbacks, the Reign E+ delivers a ride that’s both exhilarating and controlled.
Frame Design and Geometry
At the heart of the Giant Reign E+ is a robust ALUXX SL aluminum frame engineered for enduro performance. The geometry is aggressive yet balanced, with a slack head angle and long wheelbase that provide stability on steep descents and confidence in high-speed corners. The rear triangle is compact enough to maintain agility, while the integrated downtube battery keeps the center of gravity low for better handling.
The frame features internal cable routing and a clean aesthetic, with bold lines and a purposeful stance. Riders will appreciate the attention to detail, from the reinforced welds to the integrated chainstay protector that minimizes noise and wear. The Reign E+ is available in multiple sizes to accommodate a wide range of riders, and its geometry is tuned to support both seated climbing and out-of-saddle descending.
Suspension Setup and Trail Capability
Built for big terrain, the Reign E+ comes equipped with a full-suspension setup that includes a high-performance fork and rear shock. Depending on the model, riders can expect up to 170mm of front travel and 160mm in the rear, offering plenty of cushion for drops, jumps, and rough trail features. The suspension is tuned for enduro riding, with adjustable compression and rebound settings that allow for fine-tuning based on rider preference and trail conditions.
The Maestro suspension system, a hallmark of Giant’s mountain bikes, provides active rear travel that remains efficient during pedaling and responsive during impact. This means better traction on climbs and more control on descents. Whether you’re navigating root-laced trails or hammering through rock gardens, the Reign E+ keeps the wheels planted and the ride smooth.
Motor and Power Delivery
The Giant Reign E+ is powered by a SyncDrive Pro motor, developed in partnership with Yamaha. This mid-drive unit is compact, lightweight, and delivers up to 85Nm of torque, making it ideal for steep climbs and technical terrain. The 48-volt system ensures consistent power delivery, even under load, and the motor responds intuitively to rider input thanks to its Smart Assist technology.
Smart Assist uses sensors to measure cadence, torque, speed, and slope, adjusting motor output in real time to match the rider’s effort. This creates a natural pedaling feel and eliminates the need to constantly toggle assist levels. Riders can still choose from multiple modes for more control, but the system excels at providing seamless support without distraction.
Battery Range and Charging
The integrated EnergyPak battery offers impressive range, with up to 625Wh of capacity depending on the model. This translates to several hours of trail riding, even in demanding conditions. Riders can expect between 50 to 100 kilometers per charge, depending on terrain, rider weight, and assist level. For those planning longer rides, Giant offers range extender options that add additional capacity without compromising frame balance.
Charging is straightforward, with a fast-charging system that can bring the battery to 80% in under two hours. The battery is securely housed within the downtube, protected from dust, moisture, and impact. A side-release mechanism allows for easy removal, and the charging port is conveniently located for quick access.
Wheels, Tires, and Braking
The Reign E+ rolls on 27.5-inch wheels, a popular choice for enduro bikes due to their nimble handling and quick acceleration. The rims are tubeless-ready and paired with aggressive tires that offer excellent grip on loose, rocky, and muddy terrain. Wide tire clearance allows for customization based on riding style and conditions.
Braking is handled by hydraulic disc brakes with large rotors, ensuring consistent stopping power even on long descents. The modulation is smooth, and the levers are ergonomically designed for one-finger operation. Whether you’re feathering the brakes on a technical descent or coming to a hard stop on a steep slope, the system performs reliably and predictably.
Ride Experience and Handling
On the trail, the Giant Reign E+ feels composed and capable. The combination of powerful motor assistance, plush suspension, and dialed geometry creates a ride that’s both fun and confidence-inspiring. The bike climbs efficiently, with the motor smoothing out steep pitches and technical sections. Descending is where the Reign E+ truly shines, offering stability at speed and control through tight corners.
The handling is precise, with responsive steering and a planted feel that encourages aggressive riding. Riders will appreciate the bike’s ability to maintain traction in challenging conditions, and the suspension absorbs impacts without feeling sluggish. Whether you’re sessioning your favorite downhill line or exploring new backcountry trails, the Reign E+ adapts to your riding style and terrain.
Durability and Maintenance
Built for rugged use, the Reign E+ features components that are both durable and easy to maintain. The frame is treated with a corrosion-resistant finish, and the motor and battery are sealed against the elements. Routine maintenance includes checking suspension settings, brake pads, and drivetrain wear, all of which are accessible and straightforward.
Giant’s support network and dealer service make it easy to find replacement parts and perform regular tune-ups. The bike’s electronics are user-friendly, with a clear display that shows speed, battery level, assist mode, and ride metrics. Firmware updates can be performed via Giant’s app, ensuring the system stays current and optimized.
Ideal Rider Profile
The Giant Reign E+ is designed for riders who love technical trails, big descents, and all-day adventures. It’s ideal for enduro racers, weekend warriors, and mountain bikers who want to extend their range and tackle more challenging terrain. The bike’s power and suspension make it suitable for advanced riders, but its intuitive controls and balanced geometry also welcome intermediate riders looking to progress.
Whether you’re training for an event, exploring remote trails, or simply enjoying the thrill of mountain biking, the Reign E+ offers a platform that supports growth, performance, and fun. Its versatility and durability make it a smart investment for anyone serious about trail riding.
Final Thoughts
The Giant Reign E+ is a standout in the world of electric mountain bikes, offering a compelling mix of power, comfort, and trail capability. Its 48-volt system delivers smooth and responsive motor support, while the full-suspension setup ensures control and comfort on demanding terrain. With thoughtful design, durable components, and a ride feel that encourages exploration, the Reign E+ is built for riders who want to push limits and enjoy every descent.
From its aggressive geometry to its intelligent assist system, every detail of the Reign E+ is crafted to enhance the mountain biking experience. Whether you’re chasing adrenaline or seeking adventure, this e-MTB delivers the performance and reliability needed to make every ride unforgettable.
