Is the Altis Sigma Top Speed Claim Real? Fact-Checking 22Kw Power and Controller Limits
By James H. Sterling
The standard benchmark in the mid-size electric dirt category remains the Surron Ultra Bee. Comparing these two machines reveals how distinct engineering philosophies handle voltage, sustained velocity, and rider control.
The Ultra Bee operates a 74V system with an official peak rating near 12.5kW in stock trim, hitting a verified top speed around 56 to 59 mph. The Altis Sigma, with its 98V battery architecture and 22kW peak envelope, leaves the stock Ultra Bee behind across every metric from flat-out acceleration to terminal velocity. In a 0, 50 mph sprint, the Sigma gaps the Ultra Bee by several bike lengths, pulling away hard as the Surron hits its mid-50s speed wall.
The dynamic flips when aftermarket tuning enters the equation. The Ultra Bee benefits from an extensive global ecosystem of aftermarket controllers, motor upgrades, and high-discharge custom battery packs. A heavily modified Ultra Bee running an aftermarket powertrain can easily run toe-to-toe with the Sigma. Out of the box, however, the Altis Sigma provides the high-voltage performance riders used to spend thousands of dollars in custom modifications to achieve.
James Sterling reports on renewable energy developments, climate policy, ecological conservation, and green tech innovations around the globe.
