2026 Altis Sigma High Performance Electric Dirt Bike

Built for riders who want real power, range, and a platform that keeps pushing forward

The 2026 Altis Sigma is where Altis took everything that worked on the Sigma platform and refined it into something sharper, stronger, and more capable across the board. This is not just a refresh, it is a more dialed version of what riders have already been pushing hard in the real world.

At the core is a 98V system paired with a 35Ah Samsung 21700 battery and a 25kW peak hairpin motor. That combination gives you strong acceleration, high sustained power, and the ability to carry speed in a way most bikes in this class still struggle with. With a 450 phase-amp controller and updated throttle tuning, power delivery feels more controlled down low and more aggressive when you want it.

Altis also stepped up the chassis and rider interface. You are getting a new bar size upgrade to 1 1/8”, improved front suspension with a 220mm dual spring fork, reinforced components throughout, and a new headlight setup. It is still the same lightweight forged aluminum frame concept, just tightened up where it matters for durability and ride feel.

From our perspective at REV Rides, what really makes this bike stand out is how balanced it is. It has one of the best throttle Curves out there and For a long ride Aspect the seat has one of the best if not most comfortable seat and riders box. It is not just peak numbers, it is how usable that power is across trail riding, faster open sections, and everyday riding. The Sigma platform has always been strong, and this 2026 version just feels more complete.

Why the 2026 Sigma stands out

25kW peak hairpin motor gives strong top end while still staying controllable down low
98V Samsung battery system delivers consistent power and solid range for longer rides
450A controller keeps power delivery smooth but aggressive when needed
220mm dual spring fork improves front-end stability and control over rough terrain
Updated cockpit and bar size gives a more modern, planted riding position
Full size moto brakes with 260mm front and 220mm rear rotors for real stopping power

Technical Specifications

Motor Power: 25kW Peak (34 HP)
Torque: 601 Nm (44T sprocket)
Top Speed: 80+ mph on 19/19 | 65+ mph on 19/16
Battery: 98V 35Ah Samsung 21700
Battery Capacity: 3.4 kWh
Controller: 450 Phase-Amp
Weight: 198 lbs
Seat Height: 35"
Wheelbase: 51"
Ground Clearance: 13"
Front Suspension: 220mm Dual Spring Fork
Rear Suspension: 85mm Linkage
Brakes: 260mm Front / 220mm Rear, 4-Piston Hydraulic
Display: 3.5" TFT with NFC
Regen Braking: 5 Adjustable Levels
Charging Time: 80% in 2 hours, 100% in 3 hours
Cooling: Air-cooled
Wheels: 19" Front / 19" Rear
(19" Front / 16" Rear MX version coming Summer 2026)
Color: Black (Red coming Summer of 2026)

2026 Upgrades

Upgraded BMS for improved efficiency and range
Higher motor RPM for better top end performance
Increased torque output for stronger acceleration
Refined throttle tuning for smoother control
Dual spring front suspension upgrade
Dust seals added to rear linkage
Reinforced front hubs for added durability
1 1/8" handlebar upgrade
New headlight design
New 520h chain

2025 vs 2026 Altis Sigma Comparison

Powertrain & Performance

Category	2025 Altis Sigma (Standard)	2026 Altis Sigma
System Voltage	97.2V (98V class)	98V
Battery	35Ah Samsung 50S (~3.4 kWh)	35Ah Samsung 21700 (~3.4 kWh, updated BMS)
Motor	Hairpin motor	Hairpin motor (higher RPM)
Peak Power	20–22 kW (~27 HP)	25 kW (~34 HP)
Torque	533 Nm (39T) / 601 Nm (MX)	~601 Nm+ (increased output)
Top Speed	~70 mph / ~62+ mph (MX)	80+ mph (19/19) / ~65+ mph (MX)
Controller	Altis programmable	450A (refined tuning)
Throttle	Standard mapping	Refined, smoother and more aggressive
Range	~50 miles (terrain dependent)	Improved efficiency (updated BMS + tuning)
Regen Braking	5 Levels	5 Levels

Chassis & Suspension

Category	2025 Altis Sigma	2026 Altis Sigma
Frame	Steel & aluminum hybrid	Refined forged aluminum
Weight	~198 lbs	~198 lbs
Wheelbase	1285 mm (~50.6”)	~51”
Seat Height	~33”	~35”
Ground Clearance	~11.8”	~13”
Front Suspension	200mm air spring fork	220mm dual spring fork
Rear Suspension	Linkage, ~85mm travel	Linkage, ~85mm (dust seals added)
Brakes	260mm front / 220mm rear	Same (4-piston hydraulic)

Wheels & Hardware

Category	2025 Altis Sigma	2026 Altis Sigma
Wheel Options	19/19 or 19/16 (MX)	Same (MX variant continues)
Chain	428H	520H
Front Hubs	Standard	Reinforced
Rear Axle	18mm	Upgraded (stronger setup)

Cockpit & Electronics

Category	2025 Altis Sigma	2026 Altis Sigma
Handlebars	7/8”	1 1/8” (28.6mm)
Display	3.5” TFT with NFC	Same
Headlight	LED	New updated design
Charging Time	~3–4 hours	~3-4 hours
Cooling	Air-cooled	Air-cooled

Key Upgrades in 2026

25kW peak power (up from ~22kW)
Higher motor RPM for better top-end speed
Increased torque and stronger acceleration
Refined throttle tuning for smoother control
Upgraded BMS for improved efficiency and range
220mm dual spring fork for better front-end stability
Reinforced hubs and improved durability
1 1/8” handlebar upgrade
New headlight design
New 520 chain Up from 428

Wheel Options

Sigma: 19" front / 19" rear, better for stability and higher speed riding
Sigma MX: 19" front / 16" rear, quicker handling and more torque-focused feel

Who this bike is for

Riders coming from Sur-Ron or Talaria platforms looking for more power and range
Trail and enduro riders who want a lightweight bike that can still carry speed
Anyone building a high performance e-moto setup without jumping into full size gas bikes

Important Notes

Water resistant, not waterproof. Avoid direct exposure to water on electrical components
Ships via freight, some assembly required

Altis Sigma Assembly Video

Resources

Altis Sigma User Manual
How to Unlock Full Power
OTA App & Software Update Info
Altis Sigma Rider Community – Join the Facebook Group

Shipping & Assembly

Ships via freight (some assembly required)
Local pickup available by appointment
Always avoid liquid exposure to battery, controller, or wiring

ALTIS SIGMA LINKS / TECH INFORMATION

2025 Altis Sigma Unveiling Video by REV Rides

Please note: The Altis Sigma is not waterproof (only water resistant). Always avoid liquid exposure to the battery, wires/connectors, controller, cockpit controls and other electronic components.

Altis Sigma orders ship via freight unless you arrange for local pick-up. Some assembly is required.

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