Biria ST 4.0-MAX Electric Bike

Unlike cadence sensors that provide a set amount of power regardless of how hard you pedal, the torque sensor measures your pedaling effort. This results in a much more natural, intuitive ride where the motor assistance feels like an extension of your own legs, especially when starting from a stop or climbing hills.

The Biria ST 4.0-MAX is designed with a step-through frame that accommodates a wide range of heights. However, because it is a compact folding bike with 20-inch wheels, taller riders should ensure the seat post and handlebar height adjustments provide a comfortable, upright riding position before purchasing.

The bike weighs 65 lbs. While the folding design makes it compact enough to store in a closet, trunk, or under a desk, its weight makes it somewhat heavy to carry up stairs or lift into a vehicle frequently.

Yes, the 500W Bafang rear hub motor is well-suited for urban environments. It provides sufficient torque to handle typical city inclines and bridges, though your actual climbing performance will depend on the steepness of the grade and your own pedaling input.

Absolutely. The 3-inch wide tires provide a larger contact patch with the ground, which offers better stability and shock absorption than standard, thinner commuter tires. This makes the bike very capable on rougher city streets, light gravel paths, and uneven pavement.

Hydraulic disc brakes are low-maintenance compared to mechanical rim brakes, but they do require occasional checks. You should periodically inspect the brake pads for wear and ensure the brake lines remain free of air bubbles, which may require a professional bleed service once every year or two depending on your usage.