Introducing the all-new Altis Sigma Mega electric dirt bike, a next-generation, full-size electric dirt bike and motocross machine, built to take on the the most challenging tracks and terrain — and poised to ride alongside even the most powerful electric dirt bike, the Stark VARG — at a fraction of the price. With 144V architecture, 51kW peak power, and a claimed 0-60 time on par with Stark, the Altis Sigma Mega produces over 1000Nm of torque at the tire and is designed specifically for riders who demand top-tier, competition grade build quality and performance without compromise. To us, this doesn't just feel like an Altis Sigma Mega. It's the Altis Sigma Omega, to us!
We're aiming to make the first delivery of Sigma Mega to customers in late December or early January 2026. The Sigma Mega electric dirt bike is poised to redefine what riders expect from production e-moto platforms. Bang for buck, the Altis Sigma Mega offers the best price to performance in its class. Whether you race, motocross, ride track, enduro, or just wide-open-throttle, Altis Sigma Mega was engineered to put riders at the head of the pack.
Altis Sigma Mega Performance Highlights
Voltage: 144V high-voltage powertrain
Battery: 35Ah lithium-ion
Peak Power: 51kW (68 hp)
Torque: 1080Nm (at the wheel)
Top Speed: 80MPH+ (estimated)
Ride Modes: Eco, Normal, Sport, and Race
Weight: 253lbs (115kg)
Altis Sigma Mega Chassis & Fitment Specs
Wheel Size: 21” front / 18” rear — compatible with KTM & Stark VARG wheels (KTM 125-500cc models from 2004-2024, including KTM 450 SX-F 2022)
Foot Pegs: Uses existing Altis foot peg interface
Handlebars: Standard 1 1/8” clamp — no proprietary interface
Frame Geometry & Dimensions: To be announced
Suspension Options: Altis or Sirris suspension packages available (pricing may vary)
Brakes: Full-sized motocross-style calipers with steel braided brake lines and high-performance master cylinders
Ignition: Includes both physical key and NFC key activation.
Size Comparison: Larger than an Sur-ron Ultrabee, smaller than a Stark Varg.
Color Options
Black
Red
Bluetooth & Smartphone Integration: (Coming Soon)
The Sigma Mega features the same display and control interface as the current Altis Sigma. Full access to ride modes and on-bike tuning features remains unchanged. A dedicated Altis Control App is in development, designed to offer deep customization including:
Power mapping
Regen tuning
Throttle curve sensitivity
Ride mode adjustments
Altis has been refining the app software in parallel with Sigma development — they want it perfect before launch. App release will follow final tuning validation.
Use Case: Is the Altis Sigma Mega the best electric dirt bike bike for me?
The Altis Sigma Mega is built for experienced and competitive riders who demand full-send capability out of the box:
Body Type: Full-size adult riders
Riding Experience: Advanced and expert motocross & competitive riders
Use Cases: E-moto racers and motocross riders who are ready to compete with top-tier gas bikes, or have outgrown 60-72V platforms and looking for a full-size, race-ready electric motocross dirt bike.
Pricing: How much does the Sigma Mega cost?
Displayed prices are not final. Sign up for Sigma Mega product announcements and be first to receive final pricing along with other details about the Altis Sigma Mega, as they become available.
Sigma Mega w/ Performance Suspension by Altis: ~$7,500 MSRP
Sigma Mega w/ Pro Performance Suspension by Sirris: ~$8,500 MSRP
The Pro Performance Suspension Package by Sirris is a significant front and rear suspension upgrade, tuned and ready for the most demanding ride conditions. The Sirris Pro Performance Suspension Package is valued at $4,000. More details coming soon.
Availability: When will the Sigma Mega be available for purchase?
Expected Release: December 2025 - January 2026
Preorders: Beginning on November 2025
The Altis Sigma Mega isn't aiming to keep up — it's aiming to lead the pack. Stay tuned for final specs, preorder info, and early ride footage as the Sigma Mega gets closer to launch.
* The Altis Sigma Mega is intended for off-road use only. Please ride safely and responsibly.
