2025 Altis Sigma 98V Electric Dirt Bike Limited Edition

Overview

The Altis Sigma platform has quickly become one of the most talked about high-voltage e-motos for a reason. Both the 2025 Standard Edition and Limited Edition are built around a true 98V system, delivering serious torque, strong top-end power, and a chassis that feels planted whether you are on tight single track or wide open sections.

The Standard Edition laid the foundation with a proven 35Ah Samsung 50S battery, hairpin motor, and a well-balanced setup that made it one of the best value high-voltage bikes on the market. The Limited Edition takes that same platform and refines it further with higher output, improved throttle tuning, upgraded suspension components, and reinforced hardware where it matters most.

At REV Rides, what stands out with the Sigma is how usable the power is. It is not just peak numbers. The throttle curve, chassis balance, and regen system all work together to make this bike feel controlled when you need it and aggressive when you want it.

Standard vs Limited Edition Breakdown

• Standard Edition: Proven 98V platform, strong torque, smooth power delivery, and best value entry into high voltage riding
• Limited Edition: Higher peak power, refined throttle response, upgraded BMS, stronger components, and more aggressive performance overall
  
  
  

2025 Altis Sigma vs 2025 Altis Sigma Limited Edition

Feature	2025 Altis Sigma Standard Edition	2025 Altis Sigma Limited Edition
System Voltage	97.2V nominal, 98V class	97.2V nominal, 98V class
Battery	35Ah Samsung 50S lithium-ion, approx. 3.4 kWh	35Ah Samsung 50S lithium-ion, approx. 3.4 kWh, upgraded BMS
Motor	High-efficiency hairpin motor	High-efficiency hairpin motor
Peak Power	20 to 22kW, about 27 HP	23kW, about 30 HP
Torque	533 Nm with 39T sprocket, up to 601 Nm with 44T sprocket	Up to 626 Nm
Motor RPM	7800 RPM	8300 RPM
Controller	450A phase programmable controller	450A phase programmable controller
Throttle Tuning	Standard mapping	Smoother, more aggressive response
Top Speed	Up to 70 mph unlocked	70+ mph unlocked
Range	Around 50 miles, terrain and rider dependent	Similar, with improved efficiency from upgraded BMS
Regen Braking	5 selectable levels	5 selectable levels
Ride Modes	Multiple preset throttle and power maps	Multiple preset throttle and power maps
Weight	About 185 lbs with battery	About 185 lbs with battery
Wheelbase	1285 mm	1285 mm
Seat Height	About 840 mm	About 840 mm
Ground Clearance	About 300 mm	About 300 mm
Frame	Reinforced steel and aluminum hybrid chassis	Same
Swingarm	High-strength aluminum	Same
Front Suspension	Adjustable air-spring fork, about 200 mm travel	Dual spring fork, about 200 mm travel
Rear Suspension	Linkage shock, about 85 mm travel	Same, with dust seals added
Brake System	4-piston DOT hydraulic	4-piston DOT hydraulic
Front Rotor	260 mm	260 mm
Rear Rotor	220 mm	220 mm
Wheel Options	19/19 or 19/16 MX	19/19 or 19/16 MX
Tires	Off-road knobby, tube-type	Off-road knobby, tube-type
Chain	428H	428H
Rear Axle	18 mm	20 mm upgraded
Front Hubs	Standard	Reinforced
Handlebars	7/8 inch	1 1/8 inch
Display	3.5 inch TFT color screen with NFC	3.5 inch TFT color screen with NFC
Lighting	LED headlight and tail/brake light	Same
Charging Time	About 3 to 4 hours	About 3 to 4 hours
Availability	In production	Limited production, 500 units
Best For	Riders wanting the full 98V Sigma experience at a better value	Riders wanting the most refined and upgraded 2025 Sigma package

 

 

Technical Specifications

Powertrain

• Voltage: 97.2V nominal, 98V class
• Battery: 35Ah Samsung lithium-ion pack, approx. 3.4 kWh
• Battery Type:
  • Standard: Samsung 50S
  • Limited: Samsung 21700 with upgraded BMS
• Motor: High-efficiency hairpin motor
• Peak Power:
  • Standard: 20 to 22 kW
  • Limited: Up to 23 kW
• Torque:
  • Standard: 533 Nm (39T), up to 601 Nm (MX 44T)
  • Limited: Up to 626 Nm
• Motor RPM:
  • Standard: 7800 RPM
  • Limited: 8300 RPM
• Controller: 450A phase programmable controller

Performance

• Top Speed: Around 70 mph unlocked
• Range: Up to 50 miles depending on terrain and rider
• Regenerative Braking: 5 selectable levels
• Ride Modes: Multiple preset power and throttle maps

Chassis and Dimensions

• Weight:
  • Standard: Approx. 185 lbs
  • Limited: Similar weight
• Wheelbase: 1285 mm
• Seat Height: Approx. 840 mm
• Ground Clearance: Approx. 300 mm
• Frame: Reinforced steel and aluminum hybrid chassis
• Swingarm: High-strength aluminum

Suspension

• Front:
  • Standard: 200 mm adjustable air-spring fork
  • Limited: 200 mm dual spring fork
• Rear: Linkage shock, approx. 85 mm travel
• Adjustability: Preload and compression tuning

Brakes

• Front Rotor: 260 mm
• Rear Rotor: 220 mm
• System: 4-piston DOT hydraulic braking system

Wheels and Tires

• Wheel Options:
  • 19 inch front / 19 inch rear
  • 19 inch front / 16 inch rear (MX)
• Tires: Off-road knobby, tube-type
• Chain: 428H
• Rear Axle:
  • Standard: 18 mm
  • Limited: 20 mm upgraded
• Front Hubs:
  • Standard: OEM
  • Limited: Reinforced

Electronics and Features

• Display: 3.5 inch TFT with NFC key interface
• Lighting: LED headlight and tail/brake light
• Throttle:
  • Standard: OEM mapping
  • Limited: Refined for smoother and more aggressive response
• Charging Time: Approx. 3 to 4 hours
• Water Resistance: IP-rated components where applicable

What Makes the Sigma Platform Stand Out

The Sigma hits a sweet spot between lightweight play bikes and full-size motocross machines. The 98V system gives you real headroom for both torque and sustained speed, while the chassis keeps the bike predictable and stable. The Samsung battery holds voltage well under load, and the regen system helps control descents while extending ride time.

The Limited Edition builds on that with better throttle tuning, stronger hardware, and a more planted front end, making it the better option for riders pushing harder or riding more aggressive terrain.

Wheel Options

• 19/19 setup: Best for stability, higher speeds, and open terrain
• 19/16 MX setup: Quicker handling, more torque feel, better for tighter tracks

Fitment

• 2025 Altis Sigma Standard Edition
• 2025 Altis Sigma Limited Edition
• Compatible with all Altis Sigma 98V OEM components, chargers, and accessories
• Applies to both 19/19 and 19/16 factory configurations

Who This Bike Is For

• Riders stepping up from 60V or 72V platforms looking for real performance gains
• Trail and single-track riders who want torque with smooth, controllable delivery
• MX riders who want a lightweight e-moto with serious voltage overhead

Important Notes

• Water resistant, not waterproof
• Ships via freight, some assembly required

Disclaimer

This product is intended for off-road and closed-course use only. Not for use on public roads unless permitted by local regulations. Riders must follow all applicable laws and safety guidelines. Always wear proper safety gear and ride responsibly.

 

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

• OVER THE AIR APP SOFTWARE UPDATE INFORMATION
• ALTIS USER MANUAL
• HOW TO GET FULL POWER FROM MY ALTIS
  

Altis Sigma Unveiling Video by REV Rides

Altis Sigma Assembly Video

Logan taylors video 


Limited Edition VS standard

Tim Chitwood on the Sigma


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. 

Disclaimer:
This product was designed and intended for off-road and closed-course use only. Prohibited for use on public streets, sidewalks, bike paths, or other municipal property, unless otherwise posted. Refer to city, county, state and federal regulations before riding. Purchasers must be 18 years or older, or have parents/guardian permission. Always wear approved safety gear, and ride responsibly.