Eunorau SPECTER-ST Overview
The Eunorau SPECTER-ST pairs the same Bafang G510 mid-drive motor as the SPECTER-S 3.0 with a 27.5 x 3-inch semi-fat tire platform, creating a different riding character that prioritizes rolling efficiency and trail speed over maximum traction on soft terrain. The 27.5-inch wheel rolls more efficiently than 26-inch fat tire alternatives on hardpack and mixed terrain, maintaining momentum through rough sections without the rolling resistance penalty of full 4-inch fat tires.
With optional second battery configurations in 14Ah or 17Ah for up to 70 miles of range, torque-sensing pedal assist, and full dual suspension, the SPECTER-ST suits trail riders who spend most of their time on hardpack and mixed terrain rather than extreme soft-surface conditions. Available in White and Black with three battery configuration options per color.
At Electric Bikes Paradise, we carry the Eunorau SPECTER-ST as an authorized Eunorau dealer because it represents genuine value and capability in the Electric Mountain Bike category. Free shipping, no sales tax, and our Low Price Guarantee ensure you get the best available price on every purchase.
Key Features and Benefits
- 1000W Bafang G510 Mid-Drive Motor, 160 Nm, Torque-Sensing: The same flagship Bafang G510 motor as the SPECTER-S 3.0, delivering 160 Nm of torque with torque-sensing pedal assist for natural, responsive power delivery on all terrain types.
- 27.5 x 3-Inch Semi-Fat Tires: A 3-inch tire width provides better traction and comfort than standard 2-inch mountain bike tires while maintaining lower rolling resistance than 4-inch fat tires. This compromise is optimal for hardpack and mixed terrain where rolling efficiency matters more than maximum soft-surface flotation.
- Full Dual Suspension: Front and rear suspension absorb trail impacts and maintain control on technical terrain, working in concert with the G510 motor’s torque-sensing assist for a cohesive, capable trail riding experience.
- 48V 17Ah Battery with Optional Second Battery: The main 17Ah battery provides extended single-battery range, with optional 14Ah or 17Ah second battery configurations available at purchase to push total range to 70 miles.
- Torque-Sensing Pedal Assist: Motor output proportional to pedaling force for a natural, intuitive riding feel that responds to rider input rather than delivering fixed cadence-triggered assistance.
- Class 3 Speed (28 MPH): Capable of Class 3 speeds for fast road and trail riding, with adjustable speed settings for different use environments and local regulations.
- 9-Speed Shimano Gearing: Wide gear range for optimal mid-drive efficiency across the variety of terrain and gradient conditions a trail e-MTB encounters.
- White and Black Colorways: Clean, trail-appropriate colorways available in both colors with three battery configuration choices per color.
Who Is This For?
The Eunorau SPECTER-ST is built for trail riders who want the G510 motor’s performance in a platform optimized for hardpack and mixed terrain rather than extreme soft-surface conditions. If your trails are primarily hardpack singletrack, gravel, and mixed surfaces with occasional loose sections, the 27.5 x 3-inch tire format provides a better riding experience than full fat tires, with lower rolling resistance and better speed on the majority of your terrain.
Riders who split their time between road and trail riding will find the 27.5 x 3-inch tire format more efficient on paved sections than full fat tires, while retaining adequate traction and comfort for the trail segments. The SPECTER-ST is the right choice when rolling efficiency on varied terrain matters more than maximum traction on extreme soft surfaces.
Performance and Ride Quality
The G510 motor’s torque-sensing pedal assist and 160 Nm of torque perform identically to the SPECTER-S 3.0 on equivalent terrain. The difference is in the tires: the 27.5 x 3-inch format rolls faster and with less rolling resistance than 26 x 4-inch fat tires on hardpack and mixed surfaces. For trail riders whose typical terrain benefits from this efficiency, the SPECTER-ST provides a faster, more connected trail riding experience.
Design and Build Quality
The SPECTER-ST frame accommodates the 27.5 x 3-inch wheel format with appropriate clearances and suspension geometry tuned for this tire size. Available in White and Black, both colors work well for a premium trail e-MTB. The G510 motor sits at the bottom bracket in a clean integration that keeps weight low and centered.
Choosing Between Fat Tires and Semi-Fat Tires for Trail Riding
The tire width decision significantly affects how an e-MTB rides across different terrain types. Full 4-inch fat tires are optimal for very soft terrain, snow, and loose surfaces where maximum flotation and traction are paramount. They are heavier and have higher rolling resistance on hard surfaces. Semi-fat tires in the 2.5 to 3.5-inch range provide substantially better traction than standard trail tires while maintaining much better rolling efficiency than full fat tires. For riders whose trail time is split between hardpack and some loose terrain, semi-fat tires represent the better compromise in most conditions. The SPECTER-ST’s 3-inch tires target this majority-hardpack rider profile.
Full Technical Specifications
| Motor | 1000W Bafang G510 Mid-Drive Motor, 160 Nm, Torque-Sensing |
|---|---|
| Battery | 48V 17Ah Lithium-Ion (Optional Second Battery: 14Ah or 17Ah) |
| Range | Up to 70 miles with dual battery |
| Top Speed | 28 MPH (Class 3) |
| Max Load | 330 lbs |
| Wheel Size | 27.5 x 3 inches |
| Gears | 9-Speed Shimano |
| Brakes | Hydraulic Disc Brakes, Front and Rear |
| Suspension | Full Dual Suspension |
| Available Colors/Options | White, Black; optional 14Ah or 17Ah Second Battery |
Riding Tips and Long-Term Ownership
Getting the most from your Eunorau SPECTER-ST starts with understanding how to work with the motor assist system effectively. The most efficient riders use lower assist levels on flat sections to conserve battery and higher levels on climbs and headwinds. This dynamic approach extends practical range significantly compared to riding at a fixed high assist level throughout. Battery care is equally important: store the battery at 40 to 80 percent charge when not riding for extended periods, keep it indoors in cold weather, and avoid storing it fully charged or fully depleted. These habits preserve capacity over hundreds of charge cycles and extend the effective life of your battery significantly.
The Electric Mountain Bike category has evolved rapidly in 2026, with motor technology, battery chemistry, and component quality all improving at accessible price points. Eunorau’s focus on genuine specifications including hydraulic braking, quality motor systems, and robust construction reflects their position in the premium segment of the market. As an authorized Eunorau dealer, Electric Bikes Paradise provides full manufacturer warranty support, accessory recommendations, and ongoing customer service that makes the purchase a long-term relationship rather than a one-time transaction. We stock genuine Eunorau accessories and can advise on compatible upgrades for every model we carry.
When comparing the Eunorau SPECTER-ST against other options in the Electric Mountain Bike category, focus on specifications that directly affect your daily riding: motor type and torque output, battery capacity in watt-hours, suspension quality, braking system, and authorized dealer warranty support. Total cost of ownership over two to three years of riding includes battery maintenance, component service, and access to support when issues arise. Buying from Electric Bikes Paradise provides warranty coverage and support infrastructure that unauthorized resellers cannot offer. Our team at +1 (307) 429-0021 is available Monday through Friday to help you get the most from your Eunorau SPECTER-ST throughout its life.
The SPECTER-ST is available in White and Black, with three battery configurations per color: single 17Ah battery, 17Ah plus a 14Ah second battery, and 17Ah plus a 17Ah second battery. Choosing the right battery configuration at purchase is important because it affects both daily range and total ride capability. For riders who primarily use the bike for trail sessions under 40 miles, the single 17Ah battery is sufficient. For riders who plan longer adventure rides or want maximum range flexibility, the dual battery configuration removes range as a practical constraint. Our team at Electric Bikes Paradise can help you select the right configuration based on your typical riding distances and adventure plans.
For riders who regularly ride both trail and road segments on the same outing, the SPECTER-ST’s semi-fat tires provide a noticeably smoother, faster paved section experience compared to full 4-inch fat tire alternatives, making mixed-use riding more enjoyable across the full route rather than just the trail portions.
Frequently Asked Questions
What is the range of the Eunorau SPECTER-ST?
Up to Up to 70 miles with dual battery in pedal-assist mode. Actual range depends on terrain, rider weight, assist level, and riding speed.
Is the Eunorau SPECTER-ST suitable for hills?
Yes. The 1000W Bafang G510 Mid-Drive Motor, 160 Nm, Torque-Sensing provides strong hill-climbing performance appropriate to this bike’s intended terrain and use case. Higher assist levels maintain confident performance on grades.
Does the Eunorau SPECTER-ST come assembled?
The bike ships partially assembled. Final assembly takes approximately 20 to 30 minutes with basic hand tools. All tools and instructions are included.
What is the weight limit for the Eunorau SPECTER-ST?
The maximum load capacity is 330 lbs. Contact our team at +1 (307) 429-0021 for any additional capacity questions.
Does Electric Bikes Paradise offer financing for the Eunorau SPECTER-ST?
Yes. Flexible financing options are available. Visit our financing page for current terms and options.
What maintenance does the Eunorau SPECTER-ST require?
Keep the chain clean and lubricated, check tire pressure regularly, inspect brake pads periodically, and have the drivetrain serviced annually. The motor and battery are sealed units requiring no user maintenance beyond keeping electrical connections clean and dry.
Can I ride the Eunorau SPECTER-ST in the rain?
The bike has standard weatherproofing for light to moderate rain and wet trail conditions. Avoid submerging electrical components. Store the bike indoors when not in use to protect the motor, battery, and frame from prolonged moisture exposure.
Is the Eunorau SPECTER-ST suitable for heavier riders?
The 330 lbs maximum load capacity accommodates a wide range of rider weights. For riders near the maximum capacity, higher assist levels ensure comfortable performance and the frame and components are specified to handle real-world loads within the rated capacity reliably.
Assembly, Setup, and Maintenance
Eunorau electric bikes ship partially assembled with the major components factory-installed. Final assembly involves attaching the handlebar, front wheel, and pedals using the tools and instructions included in the packaging. Most riders complete setup in 20 to 30 minutes. Before your first ride, verify all bolts are tightened to specification, confirm the brakes engage firmly before the levers reach the handlebars, and charge the battery fully.
Regular maintenance keeps any electric bike performing at its best. Clean and lubricate the chain every 100 to 200 miles or after wet rides. Inspect brake pads periodically and replace when worn. Check tire pressure before every significant ride. The motor and battery are sealed units requiring no user maintenance beyond keeping connections clean and dry. Annual service at a qualified bike shop addresses any drivetrain, brake, or suspension adjustments needed to maintain peak performance.
Warranty Information
All products sold at Electric Bikes Paradise come backed by the manufacturer warranty. We also stand behind every purchase with our customer-first support team. If you experience any issues, contact us at +1 (307) 429-0021 or visit our Warranty Policy page for full details.
Why Buy from Electric Bikes Paradise?
At Electric Bikes Paradise, we specialize exclusively in electric bikes and related products. As an authorized Eunorau dealer, we provide full manufacturer warranty support and dedicated customer service for every purchase. Our team has hands-on knowledge of every model we carry and can help you choose the right configuration for your riding style, terrain, and budget.
Every order ships free to the continental United States with no sales tax added at checkout. Our Low Price Guarantee means you always get the best available price, and our hassle-free returns policy gives you confidence to buy. Flexible financing options make premium electric bikes more accessible, and our support team is available Monday through Friday, 9am to 5pm MST at +1 (307) 429-0021.
At Electric Bikes Paradise, we make it easy to get the best electric bike at the best price. Every order ships free with no sales tax, and our Low Price Guarantee means you never overpay. Shop with confidence knowing our expert team is available Mon-Fri 9am-5pm MST to answer your questions. Ready to ride? Explore financing options or contact us today.