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All inventory items are freshly produced, and the listing is updated in real time. If the items you order are within the available stock range, they will be allocated from inventory as usual. If your order is not listed in the stock range, or you select a stock wheelset group, and the stock runs out, production will need to be arranged.

In the world of mountain bike racing, lightness and strength have always been a challenging balance.
Riders want nimble and responsive wheels without compromising reliability or impact resistance.
BTLOS INTEGRA X30 Carbon MTB Rims are designed for high-intensity XC, XCO, XCM, and XCC races, combining innovative structural concepts, precise layup techniques, and advanced material technology.

For years, lightweight road rims have faced the same dilemma — reduce grams and risk strength, or add reinforcement and lose responsiveness. At BTLOS, we refused to compromise. The AERIX series was created to achieve both: race-level lightness with long-term structural integrity.

As the administration continues to implement new trade policies, U.S. tariffs on certain imported goods, including bicycle-related products, have been steadily increasing. This has led many American consumers to become more cautious about purchasing international products, worrying about the additional costs brought on by higher tariffs.

BTLOS hubs are produced by a well-known hub factory in the industry, which has been manufacturing for multiple major brands for years. This factory boasts a mature technical system and strict quality control processes. BTLOS leverages these advanced technologies and exquisite craftsmanship, passing them directly to consumers. By reducing brand premiums, BTLOS is able to invest more in product research and development, providing consumers with a high-performance option at a more cost-effective price.

As a leader in the cycling components industry, DT Swiss has introduced the all-new 240 DEG hubs, featuring the innovative Ratchet DEG system. Known for its exceptional durability and efficient power transfer, this hub has become the top choice for cycling enthusiasts and professional riders alike. Now, BTLOS offers you the opportunity to build a custom wheelset based on this top-tier hub, delivering an unparalleled riding experience.

We used the standard series of ARC39 wheels for testing. After the test, the lateral runout and radial runout of the wheel only changed by 0.07mm and 0.05mm. This is a very amazing result.

Dear BTLOS Customers,

As the Chinese New Year approaches, we would like to take a moment to express our heartfelt gratitude for your unwavering support throughout the years. Your trust in BTLOS means the world to us, and we are excited to share a few important updates along with a special offer to show our appreciation.

When choosing the right BTLOS carbon fiber mountain bike wheels, you need to consider the various versions available: XC (Cross-Country), AM (All-Mountain), EN (Enduro), and DH (Downhill). Each version has unique features and is suited to different types of riding and terrain. In this guide, we'll break down the characteristics of each version and help you select the best one for your needs.

The biggest shopping event of the year is here, and BTLOS is bringing you exclusive Black Friday deals you won’t want to miss! Whether you're upgrading your bike with a new set of carbon fiber wheels or looking for the best deal in cycling accessories, we’ve got something for everyone. Let’s dive into the details of our Black Friday Mega Sale...