Alloy Mountain Bike (MTB) Gear Bicycle Frame Material: An alloy mountain bike features a lightweight yet durable frame made from a mix of aluminum and other metals. Aluminum alloy is known for being both strong and light, making it ideal for mountain biking where durability and speed are crucial. The alloy frame ensures the bike can withstand rugged terrain while keeping the overall weight low for easier maneuverability. Gearing System: These bikes come equipped with a sophisticated gear s