Cranks (MTB)

Mountain bike cranks are a central component of the drivetrain of a mountain bike and play an important role in transferring power from the rider’s legs to the rear wheel. They typically consist of two arms connected to the pedals and an axle that fits into the bottom bracket. Chainrings are mounted on the crank arms, through which the chain transfers power to the rear wheel. Choosing the right crankset can significantly affect the bike’s efficiency, weight, and ride feel.

Cranks are made from various materials, with aluminum and carbon being the most common. Aluminum cranks are robust, durable, and relatively affordable, which is why they are often found on entry-level and mid-range models. Carbon cranks, on the other hand, are lighter and offer greater stiffness, making them ideal for ambitious riders who prioritize performance. However, they are more expensive and less resistant to impacts and shocks.

Another important distinguishing feature of mountain bike cranks is the number of chainrings. Modern cranks are often designed as a 1x system (a single chainring in the front), which reduces weight and simplifies shifting. This is particularly popular in mountain biking, where a simple and lightweight drivetrain is advantageous. However, 2x and 3x systems (with two or three chainrings) offer a wider gear range and are often preferred by touring riders or in very mountainous terrain.

Manufacturers like Shimano and SRAM dominate the market for mountain bike cranks. Shimano offers models like the Deore or XT series, known for their reliability and good price-performance ratio. SRAM, on the other hand, has made a name with its "Eagle" series, specializing in 1x systems and appreciated for its smooth shifting and precision.

Ultimately, the choice of the right mountain bike crank depends on the rider’s individual needs—whether they prioritize weight, durability, or versatility.

Important manufacturers of mountain bike cranksets include: FSA, Truvativ, White Industries, and DMR.