There are two types of headsets : A-type headsets are traditional models with external bearing cups (in which the bearings sit), while integrated headsets have sealed bearings that sit inside the frame. Integrated headsets save weight, look better, and last longer.

Some riders use them, some don't. If you're new to BMX or live on a hill, you'll definitely use the rear brake! All our complete bikes come with brakes, while our high-end models feature removable brake mounts that are easy to take off and put on. Although bikes are rarely pictured with front brakes, all our bikes come with them.

When buying top-of-the-line bikes, look for unsealed bearings; they last longer and require less maintenance. There are also two types of axles: male and female. Female axles offer a cleaner look, but both types are compatible with all types of forks and bikes.

There are three main types. A freewheel hub, and the more reliable and responsive cassette hub, or freecoaster. Cassette hubs come with smaller gears (usually 9 teeth) and are found on most bikes. Partially sealed cassette hubs are good, but fully sealed models are better, and aftermarket hubs are the absolute best. Also, look out for freecoaster hubs on high-end bikes: these allow you to ride "fakie" (backwards), as the cranks don't turn when you're rolling backwards.

Depending on the desired gear ratio, the front sprocket and the rear freewheel or cassette hub play a crucial role. The smaller the chainring, the more weight is saved and the more leeway you have when riding ramps or grinding. A 25-9t cassette is best for complete bikes.

The outer side of the wheel. They come in single-wall or double-wall versions. Double-wall rims are more stable and stiffer and are more important for rear wheels, which are subjected to greater stress than front wheels.

Aftermarket tires are best suited for this purpose. The size (width) of the tires varies and depends on the rider's personal preferences. A width of 2.2 inches is average.

Cranks are subject to heavy wear and tear and must be robust enough to withstand the demands of riding. Tubular cranks are the best choice, while brand-name cranks are even better. There are two types of bottom brackets (BB): US-BB (United States Bottom Bracket) are larger and unsealed. The smaller Mid-BB (Mid Bottom Bracket) are almost always sealed and therefore more robust, last longer, and require minimal maintenance.

Most bikes nowadays come with plastic pedals ; the brand-name models are usually the best. Aluminum pedals last longer and offer more grip, but can cause more pain to your shins if you slip, and are generally heavier as well.

There are four different saddle types: Railed or Combo saddles are found on beginner bikes, while Pivotal or Tripod saddles are found on intermediate and pro bikes. These models are easier to mount/adjust and are lighter. They also offer more replacement options, without needing to change the seatpost.

This part holds the handlebars to the fork. All stems are of comparable quality, but CNC-machined models are lighter and offer a cleaner look. Stems clamp the handlebars either from above (top-loading) or from the front (front-loading).