Science – Rungu

The Science of Rungu, E-Bikes and E-ATVs

Rungu Dualie® – Why It’s The ONLY Recreational, Off-Road E-ATV On The Market

From the extraordinary weight of a typical E-ATV and its impact on off-road range, Rungu Dualie® offers better off-road performance with all the quiet and 35x the off-road power efficiency of an E-ATV. E-ATVs weigh 30% more than gas-powered Quad ATVs Here’s a realistic weight comparison of recent (2024–2025) electric ATVs versus their gas-powered equivalents.…

Quad ATVs Are Eight Times Louder Than Rungu Dualie®

In general, Electric bikes (E-Bikes) are dramatically quieter than quad ATVs (four-wheel all-terrain vehicles). Rungu Dualie’s off-road capabilities rival those of a recreational ATV, but gas-powered ATVs are eight times louder! Here’s a realistic comparison based on typical real-world measurements and user reports: Vehicle Type Typical Noise Level (at full throttle, ~10–20 m away) Perceived…

Engineering Analysis – Why Rungu Dualie® outperforms AWD E-Bikes off-road on steep inclines.

Rungu Dualie easily outperforms socalled “All-Wheel Drive” – AWD e-bikes – off-road on steep inclines. This article explains the physics that belies the claim that AWD e-bikes perform better than mid-drive e-bikes. It also explains why to choose Rungu if you plan to ride steep inclines off-road. Sellers of e-bikes with All-Wheel Drive “AWD” (front…

E-bike engineering analysis– why to avoid hub-drive e-bikes for off-road conditions.

Trigger warning – this article contains math and graphs If you are looking to buy an e-bike for off-road use – off-road use means mud, snow or sand – avoid e-bikes with hub motors. Many e-bike sellers are touting fat-tire, hub-drive e-bikes as suitable for off-road use without qualification. Difficult off-road conditions can include soft…

Why Rungu is more stable than a bicycle

…it’s not an adult trike Rungu can stay upright and has three wheels but it isn’t an Adult Trike. An Adult Trike, like the Schwinn Meridian, has two wheels in back like a kid’s trike but has upright seating like a bicycle. The rear wheels are positioned more than two feet apart and require no…

E-Bikes: Motor power or bike weight?

E-bike Range and Performance: Rungu Dualie is heavy, but does that matter? Rungu Dualie® E-Bikes are heavier than many E-Bikes because of the fat tires and extra wheel. On the other hand, Rungu Dualie is much lighter than an ATV and has practically the same capabilities for off-roading. You may assume that the extra weight…