https://cyrusher.eu/products/zenith
Here is a detailed summary of the video from the “OFF-GRID Fai da Te” channel, reviewing the Cyrusher Zenith electric fat mountain bike [00:02]:
Unboxing and Assembly
Box contents: The bike arrives well-protected and securely packaged [00:25]. Inside, you’ll find the (massive) front wheel, headlight, reflectors, bell, pedals, charger (58.8V 2A), assembly tools, and a multilingual user manual [01:24].
Assembly: Assembly is quick: attach the handlebars, flip the bike over (removing the battery first to reduce weight) to install the front wheel and pedals, and finally mount accessories like the kickstand, headlight, and bell [02:05].
Key Technical Specifications
Frame and Weight: The frame is made of aluminum alloy; it is extremely robust with a sporty design (fenders and racks are not included) [04:30], weighing nearly 35 kg with a load capacity of 150 kg [05:09].
Motor and Battery: It features a 52V, 250W motor (compliant with legal limits) that delivers exceptional torque of 80–95 Nm [05:09]. It is powered by a 52V 15Ah (780 Wh) LG battery, offering an estimated range of up to 96 km in pedal-assist mode [05:46].
Dual Sensor System (Torque and Cadence): Its most distinctive feature is the inclusion of both a torque sensor and a pedal (cadence) sensor; you can switch between them directly via the display by holding down the “+” button [05:29], [07:33]. Components: Massive 26x4-inch all-terrain tires [05:57], lockable front suspension (approx. 70mm travel) [06:12], dual hydraulic disc brakes [06:21], 7-speed Shimano Tourney drivetrain [06:31], and a very clear, vertical color LCD display [07:00].
Road Test and Impressions
Sensor Operation: The reviewer notes that, regardless of the selected assist level (1 through 5), the bike tends to quickly reach its top speed of 25 km/h (or slightly higher) [09:24], [11:03]. The assist levels determine how quickly that speed is reached, rather than the speed limit itself [11:14].
Torque Sensor: It is extremely sensitive; even the slightest pedal input causes the bike to surge forward instantly [08:59], [14:02].
Pedal Assist Sensor (PAS): It requires about half a pedal rotation to engage, and the power delivery is slightly smoother [10:55].
Comfort and Hill Climbing: With suspension only at the front, bumps and impacts are felt at the rear if the tires are fully inflated (the reviewer recommends lower pressures to take advantage of the fat tires’ natural cushioning effect) [10:17], [14:37]. In steep hill tests, the bike shows no hesitation, conquering inclines effortlessly—especially when using the torque sensor, which allows for lightning-fast starts from a standstill [13:14], [14:02]. Conclusions
The Cyrusher Zenith is described as a “macho” e-bike—highly fun, imposing, and ideal for off-roading and outdoor excursions, thanks to its formidable climbing power and aggressive design [15:32].