Brand/Model: The bicycle is a Lumstar mountain bike, likely a "Shark" or similar model.
Frame: It features an alloy frame with a blue and yellow color scheme.
Suspension: It has a dual suspension system (front suspension fork and a rear shock absorber).
Brakes: The bike is equipped with dual disc brakes.
Gears: It has a multi-speed gear system, typically 21 speed on this type of model.
Wheel Size: Common sizes for this model are 24" or 26".
