Oben Electric Rorr EZ Sigma range and running cost

The Rorr EZ Sigma is rated at 140 km (certified IDC range). Treat that as a ceiling: real-world figures are usually 15–25% lower.

Among the 17 electric bikes we have reviewed it ranks 15th for range, 39 km below the group average of 179 km.

Charging at home in Delhi at about ₹7.5/unit, a 3.4 kWh pack costs roughly ₹28 to fill and works out to about ₹0.20 per km. Riding 30 km a day, that is around ₹156 a month, a fraction of what a petrol scooter costs to run.

Spread over five years and 46,800 km, the Rorr EZ Sigma works out to about ₹2.3 per km all-in, of which 9% is electricity and 79% is the purchase price itself. Resale value is not counted; expect roughly 50–60% of ex-showroom after five years for a well-kept example.

Range on the Rorr EZ Sigma depends on mode more than anything else. The highest mode can cut range by a third compared with Eco, and sustained speeds above 60 km/h drain the pack quickly because aerodynamic load grows with the square of speed.

Charge to 80% for daily use and only fill to 100% before a long ride; lithium packs age slower that way, and most warranties only replace a battery that falls below 70% of original capacity.

Cold mornings and a heavy pillion both trim range. Budget for the low end of the real-world band in winter and when riding two-up.