Cyrusher Aura

The Cyrusher Aura is a fat-tire electric bike built on a step-through aluminum frame, aimed at riders who want a high-powered bike they can get on and off without swinging a leg over a top tube. A 52V 750W rear motor produces 95 Nm of torque and peaks at 1050W, so the Aura pulls away from a stop under load and keeps moving on grades where a lower-torque hub motor would bog down. Puncture-resistant 26-inch by 4-inch tires spread the bike's weight across loose surfaces, which makes it steadier on gravel, packed dirt and hard-packed sand than a narrow-tire commuter.

Power comes from a 52V 15Ah pack built with Samsung 21700 cells, rated at 780Wh. Cyrusher claims as much as 60 miles per charge, with 35 or more miles available on throttle alone; what you actually see depends on rider weight, terrain, assist level and how often you lean on the throttle. Refilling the pack takes roughly seven to eight hours on the 2A charger. A switchable sensor lets the rider choose between torque sensing, which meters assist against pedal effort for a more natural feel, and cadence sensing, which delivers assist as soon as the cranks turn. A thumb throttle is fitted for riding without pedaling.

The 21-inch aluminum frame fits riders between 5'1" and 6'4" and carries a 350-pound payload. Suspension is front only, since the specification sheet lists a front unit and names no rear shock, and 180mm hydraulic disc brakes handle stopping, which matters on a 66-pound bike running wide tires. Rider information is split between a 3.7-inch color LCD and a secondary 1.7-inch TFT dashboard. Front and rear lighting is standard, including a rear brake light, and the bike is rated IPX5 overall with selected components rated IPX7.

Cyrusher reports SGS certification to UL 2849 for the electrical system and UL 2271 for the battery. Fenders and a rear rack are offered as a matched accessory set rather than fitted as standard, and several Cyrusher accessories, including that set, a front rack and a suspension seat post, are listed as fitting both the Aura and its step-over counterpart.

Fit, Colors and Accessories

• Frame: 21" aluminum step-through, listed for riders 5'1"-6'4"
• Payload capacity: 350 lbs
• Bike weight: 66 lbs
• Color options: Blue, Black and White
• A step-over frame version of the same platform is sold separately for riders who prefer a diamond frame
• Fenders and a rear rack are supplied as an accessory set rather than fitted as standard
• Cyrusher lists the fender and rack set, a front rack and a suspension seat post as fitting both this frame and the step-over version
• An assembly video and a written assembly guide are provided for the setup required at delivery