Box One Oversized 31.8 x 1-1/8" Top Load BMX Bike Stem 48mm, 6061-T6 Cold-Forged Aluminum, Chromoly Bolts, Easy Handlebar Installation, ±5° Rise, Blue

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Description

The Box One Oversized 31.8 x 1-1/8" Top Load adjustable bike stem is designed specifically for serious BMX racers who need maximum power transfer and control. Utilizing Box’s Oversized Technology, the stem improves the connection between handlebars and the fork by increasing the stem interface surface area. This optimization reduces flex and twist, ensuring that every pedal stroke delivers maximum performance when you need it most. The Oversized handlebars feature a thicker wall and larger tube diameter, and the stem is carefully designed to complement this, enhancing responsiveness and stability. This unique design minimizes handlebar-to-stem deflection, allowing for better power delivery and improved handling, especially during sprints and high-speed maneuvers. The Bicycle handlebar stem is made from 6061-T6 aluminum, the BMX stem is cold-forged for superior strength without sacrificing weight. Chromoly clamping bolts ensure a tight and secure hold between your stem and handlebars, providing improved control and reduced slippage. With an anodized finish and laser-etched graphics, this stem not only performs well but also looks sleek and professional. Its top load clamp design makes handlebar installation and adjustments fast and easy, an essential feature for racers who need quick changes between practice sessions or races. The 31.8mm bar bore fits most modern handlebars, while the 48mm, 53mm, and 60mm sizes provide options for different riding styles and preferences. The stem also offers a ±5° rise and a 28mm stack height, offering a balanced and comfortable riding position. This Bike handlebar stems are compatible with Box One XL, X2, and X5 forks with 1-1/8” steerer tubes, as well as Box One Alloy or Cro-mo Triple Taper handlebars with a 31.8mm bar bore. It’s perfect for larger-sized racers who want to improve pedaling stiffness, increase handlebar control, and enhance responsiveness.

Item Details

Pickup Location

4031 Market Center Dr Suite 303

North Las Vegas, NV, 89030

Quality

Used

Functional

No Damage

No Assembly Needed

In Package

No Missing Parts

Auction closes

October 23, 2025 at 2:10 AM

Estimated Retail Price

$69.98

Buyers Premium

15%

Inventory Number

1050346292

Found in

Outdoors & Sports

Additional Details from the Manufacturer

This item information is coming from the manufacturer. Some of the details may vary from the Nellis Auction listing. Please check the Quality Rating and Notes for information specific to this listing

brand

Box

color

Blue

size

Box One Oversized 31.8 x 1-1/8" - 48mm

weight

0.59 lbs

More features

MAXIMUM POWER TRANSFER: The Box One Oversized 31.8 x 1-1/8" Top Load BMX bike stem is engineered with Oversized Technology, minimizing twist and flex between the handlebars and stem. This optimizes pedaling stiffness, helping deliver more power with every stroke while maintaining enhanced responsiveness on the track.
EASY HANDLEBAR INSTALLATION: Designed with a Top Load Clamp, this bicycle stem ensures a smooth and hassle-free handlebar installation and removal process, allowing you to make quick adjustments before races. The geometry has been specifically tailored to improve utility, making it ideal for those who require performance and practicality without compromising strength.
HEAVY-DUTY CLAMPING: The adjustable bike stem features a 31.8mm bar bore and durable chromoly clamping bolts, creating a secure and stable connection between the stem and handlebars. This robust clamping system ensures a strong, slip-resistant grip, which is crucial for maintaining control during intense sprints and sharp maneuvers.
BUILT TO LAST: Constructed from 6061-T6 cold-forged aluminum, this BMX racing stem combines exceptional strength with a lightweight design, providing the perfect balance of durability and weight savings. The anodized finish with laser-etched graphics adds extra protection against wear and tear while giving your bike a sleek, professional look.
FORK COMPATIBILITY: The Top Load bike stem riser is specifically designed for Box One XL, X2, and X5 forks with a 1-1/8" steerer tube, and Box One Cro-mo or Alloy Triple Taper handlebars with a 31.8mm bar bore, this stem is a versatile upgrade to enhance your BMX racing setup. The compatibility ensures easy integration with other high-quality Box components.

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