Alta Performance 20 X 1-1/8 Bicycle

This refers to a narrow 20-inch tire with a 1-1/8 inch width, commonly used in BMX racing bikes or performance youth bikes. The size prioritizes speed and low rolling resistance over grip or cushioning. It's designed to fit ISO 451mm rims, which are typically found on BMX race bikes—not standard BMX freestyle models (which often use ISO 406).

This tire is rated for up to 100 PSI (pounds per square inch), meaning it is built to handle high air pressure. High PSI reduces rolling resistance and increases speed, which is especially important in competitive racing environments. It also reflects the tire’s durable construction, making it less prone to deformation during hard acceleration or tight cornering.

The AL-2312 tread is a slick design, meaning the tire has minimal to no tread pattern. This is ideal for smooth, paved, or hard-packed race tracks, where maximum contact with the surface improves traction and speed. Slick treads are not suitable for off-road use, but they excel in controlled racing conditions where efficiency and grip on clean surfaces matter most.

A wire bead uses steel wire in the edge of the tire to help it maintain a firm grip on the rim. It’s durable, reliable, and cost-effective, though slightly heavier than folding (Kevlar) beads. Wire beads are standard in many performance tires where durability is key and weight savings are less critical.

“Standard” in this context refers to the overall build and fitment, meaning it’s made for typical 20-inch ISO 451 rims and does not include additional features like folding beads or tubeless compatibility. It fits a standard rim profile and requires a tubed setup, making it easy to install and maintain.

This tire features a full black tread and sidewall, offering a clean, stealthy aesthetic that matches well with most BMX and race bike color schemes. The black sidewall is typically more resistant to UV damage and scuffs than lighter sidewalls and also gives a performance-focused appearance.

ALTA is known for producing a wide range of aftermarket bicycle components and accessories, including tires built for durability, performance, and affordability. The ALTA brand is commonly used by both recreational riders and BMX enthusiasts looking for reliable replacement parts with racing-grade specs.

This refers to the bead seat diameter (BSD) of 451mm, which is the international standard measurement for rim compatibility. It’s not interchangeable with the more common 406mm 20-inch tires, which are wider and used for freestyle or casual riding. ISO 451 is specifically used on narrow-rim BMX race bikes, junior road bikes, and some folding bikes.