X-Lab ST5+ 27.5 - Nightfall Black
Product details
| Management number | 235549710 | Release Date | 2026/07/02 | List Price | US$599.70 | Model Number | 235549710 | ||
|---|---|---|---|---|---|---|---|---|---|
| Category | |||||||||
X-Lab ST5+ 27.5
The ST5+ brings X-LAB engineering to modern urban mobility.
Powered by an integrated electric system and built on a refined aluminum platform, the ST5+ delivers smooth acceleration, confident handling, and the comfort needed for everyday riding.
Designed for riders who want more from their city bike, the ST5+ makes commuting faster, cleaner, and far more enjoyable.
From daily travel to spontaneous detours, the ST5+ transforms the way you move through the city.
Key Features
- "This is the one for replacing car trips..." - BikeRumor
- Mid-Drive utility machine that's commuter ready
- 619Wh battery + up to 75+ mile range
- Torque for real hills and real loads
The Mission Command Center
A fully integrated cockpit with an accessible color dashboard puts speed, range, assist mode, and ride data right where you need it – simple to read, effortless to use, and built for everyday reliability and adjustments.
Built Tough, Ride Smooth
A durable alloy frame and a complete build around 54 lbs delivers stability and confidence that prepares the rider for commutes, errands, and long rides with real utility in mind.
Mid-Drive Power Engineered In-House
A mid-drive system tuned as a complete platform with torque where it counts, smarter control, and an integrated Branta ecosystem designed for a better ride feel and easier long-term performance.
All-Inclusive Security + Updates
ST5+ doesn’t stop at hardware: with Find My and the X-LAB Bikes app, you get security, ride customization, diagnostics, and over-the-air updates, so your bike stays current, protected, and ready for every day.
Specifications
| Feature | Details |
|---|---|
| Frame | XDS X6 Alloy Frame, UDH Compatible |
| Fork | XDS Suspension Fork, Coil Spring, 80mm Travel, 110x15mm Thru-axle |
| Handlebar / Stem | Branta Alloy Integrated, with Display & Front Light, 680mm Width, 90mm Length, 6° Rise, 15° Backsweep |
| Seatpost | XDS 31.6mm Alloy Seatpost, 350mm Length |
| Rear Derailleur | Shimano Cues RD-U4000, 9-Speed |
| Shifter | Shimano Cues 9-Speed |
| Brakes | Branta EC4D Hydraulic E-Bike Brake, Cutoff Switch, 3 Finger Lever, 4 Piston Caliper |
| Cassette | Shimano CS-LG300 11-46T, 9-Speed |
| Crankset | Branta Alloy Crankset, 46T, Narrow-wide Teeth |
| Motor | XDS Mid-drive X800, 250W Continuous, 470W Peak, 95Nm Torque, Dual-sided Torque Sensor |
| Battery | XDS Rechargeable Li-ion, 619Wh, LG Cells, 3A Charger (0-100% in 5 hrs) |
| Lights | Integrated Front & Rear Lights (+ Brake Lights) |
| Speed | Pedal-assist & Throttle, Class 2 20mph (Unlock to Class 3 via App) |
| Range | Up to 75 miles per charge |
| Testing & Compliance | UL2271 & UL2849 Certified, IP54 Bike, IPX7 Battery, IPX6 Electronics |
| Load Capacity | 330 lbs (150 kg) |
| Connectivity | Apple Find My, Bluetooth, OTA Updates |
| Rotors | Branta PN28, F & R: 180mm |
| Chain | KMC E-GLIDE-S |
| Wheelset | Branta Alloy E-Bike Wheelset |
| Tires | CST CTC-06, 27.5” x 2.4”, 30 TPI, Reflective Stripe, Max Clearance: 2.4" |
| Saddle | Branta C301 |
| Phone Holder | Quad Lock Mount |
| Rear Rack | MIK-HD Rack |
| Weight | 24.76 kg / 54.58 lbs (Size L) |
| Size Options | M / L |
Sizing & Geometry
Video
WARNING: This product contains chemicals known to the State of California to cause cancer reproductive harm
The products in this store may expose you to chemicals such as Nickel which are known in the state of California to cause cancer, and Bisphenol A (BPA) which is known to the state of California to cause birth defects or other reproductive harm.
For more information go to https://www.p65warnings.ca.gov
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