What Is a BMX Crankset?

BMX cranks are the metal arms that link bike pedals to the bottom bracket. Freestyle cranksets are built to be durable and play a crucial role in generating forward motion on a BMX. Unlike race BMX bike cranks, which are constructed from aluminum or carbon fiber, freestyle cranks are made from steel or Chromoly.

What Are the Different Types of BMX Cranksets?

There are three primary types of cranksets for freestyle BMX: 1-piece, 2-piece, and 3-piece. 1-piece cranks are secured by the bearings and are typically found on entry-level bikes and older models. 2-piece cranks feature one crank bolt, are easy to install, and include a spindle built into one of the crank arms. 3-piece BMX cranksets are the most common style found on freestyle BMX bikes. They are generally heavier but sturdier than 2-piece cranksets and often slightly wider.

How Long Should my BMX Cranks Be?

BMX crank arms are available in various sizes, ranging from approximately 125mm to 190mm, but most riders prefer a length of 170mm or 175mm.

The length of your crank arms is ultimately a personal choice, but it does impact your riding. If your aim is to ride at high speeds, longer crank arms are recommended. For street riding, shorter arms are preferable as they provide better clearance.

Lastly, ensure your crankset is compatible with your pedals and that you know the size of your bottom bracket.