Rims

BMX Rim Guide: Properties, Types & Spoke Patterns

Properties

The stability, weight, and ultimately the price of a BMX rim depend largely on the materials used and the complexity of its manufacturing process. Entry-level rims are typically single-walled, meaning they lack an internal hollow chamber. While this design reduces weight and cost, it also results in lower lateral stability. Such rims are more prone to deformation during impacts—commonly referred to as developing a "wobble" or a "bent rim".

That said, in BMX Freestyle, particularly in BMX Street, it’s widely accepted that rims won’t stay perfectly true for long. Due to frequent landings and impacts, keeping the wheel perfectly aligned can be more hassle than it's worth. Thanks to wider tires and lower average speeds, minor imperfections often go unnoticed.

Single-wall rims are usually found on beginner-level complete bikes. However, if you've already started performing tricks or jumps, we recommend upgrading to at least a pinned double-wall rim. These provide a good balance between strength and weight.

High-end BMX rims typically feature one or more hollow chambers (double or even triple-wall designs) for increased strength. The rim joint construction is another important factor: some rims are pinned, while others are fully welded, offering additional durability.

Hole Count

Most BMX rims used in all-around and flatland riding feature 36 spoke holes, which is the standard. However, you can also find rims with 32 or 48 holes. Always check the hole count on your hub before purchasing a new rim to ensure compatibility.

Additionally, be aware of whether the rim is designed for regular lacing or cross lacing—this determines how the spokes are arranged during wheel building. You’ll find more information on that further below.

Joint Types

Pinned Joint

With a pinned rim joint, the ends of the rim are pressed together during manufacturing, often in the same step as the bending process. This is a simpler and more cost-effective construction method.

Some advanced pinned joints, such as the sleeve joint, include an inner aluminum sleeve that is inserted and bonded within the rim cavity. Pinned rims are typically recommended for light to medium usage due to their sufficient strength at a lower cost.

Welded Joint

With a welded rim joint, the ends of the rim are fused together. This manufacturing process is more complex and is typically found on high-quality rims. Welded joints offer exceptional durability and resistance to deformation, making them ideal for heavy usage, aggressive riding, or situations where a pinned joint simply won’t hold up.

Aero BMX Rims

Aero rims feature a taller, rounded profile without brake flanges, resulting in a cleaner, more uniform look when the tire is mounted. Due to their construction, these rims are generally lighter than traditional rims with brake tracks.

However, Aero rims are only suitable for brakeless setups and are especially popular on front wheels, where many BMX riders choose to forgo the brake. These rims are perfect if you prioritize aesthetics and minimal weight over braking compatibility.

Spoke Hole Arrangement

Regular Laced (Standard)

Spokes from the left hub flange go into the left-side holes of the rim, and those from the right flange into the right-side holes. This is the most common lacing method and ensures an even spoke tension across both sides.

Cross Laced

Spokes from the left flange are laced into the right-side holes of the rim, and vice versa. This configuration requires a specific rim designed for cross-lacing and may affect how the wheel behaves under load.

Centered Spoke Holes

Some rims have spoke holes aligned along the center of the rim profile instead of offset to the left or right. When lacing such rims, just ensure you maintain the proper order and tension of the spokes, as the visual cue of left/right alignment is absent.

Conclusion

Choosing the right BMX rim depends on your riding style, skill level, and performance needs. Here's a quick summary:

• Beginner or light street use? Go for an affordable single-wall rim.
• Doing tricks, gaps, or riding aggressively? Invest in at least a pinned double-wall rim.
• Need maximum strength and durability? A welded joint, double or triple-wall rim is your best bet.
• Brakeless and looking for a clean setup? Consider a lightweight Aero rim, especially for the front wheel.
• Check your hub's spoke count and lacing method before buying to ensure full compatibility.

Need help choosing the right rim for your bike? Contact us—our BMX experts are happy to assist you!