IRD Ird Qb-55 Jis 68X103, Square Taper Bottom Bracket

Upgrade your bike's drivetrain with the Interloc Racing Design QB55 Cartridge Bottom Bracket (BB), JIS - 68x103mm, the ultimate choice for reliable performance and precision engineering. Crafted in Japan, this sealed cartridge bearing features durable steel cups and a robust construction designed to withstand rigorous cycling conditions. Materials & Durability: Constructed with sealed bearings and steel cups, the QB55 BB offers superior longevity and resistance to dirt, water, and grime. Its high-grade materials ensure smooth rotation and reduced maintenance, making it ideal for both professional and enthusiast cyclists. Performance & Engineering: Designed with precision JIS square taper interfaces, the QB55 provides a secure, wobble-free fit for JIS crank arms. The 103mm spindle length perfectly balances stiffness and clearance, optimizing power transfer and pedaling efficiency. The sealed cartridge bearing system minimizes friction and enhances overall durability, delivering consistent performance ride after ride. Components & Technology: Features a 68mm shell width with a shell ID of 33.6mm x 24 TPI, compatible with various cycling setups. The cartridge design simplifies installation and replacement, ensuring a snug fit for BSA (English) threaded frames with right-hand and left-hand threads (BC1.37 x 24 TPI RH/LH). This innovative design reduces maintenance time and prevents creaking, allowing for more miles of smooth riding. Style & Use Case: Perfect for road bikes, touring bicycles, and mountain bikes that utilize JIS square taper cranksets. Its classic steel cup design combined with modern sealed bearing technology makes it suitable for everyday riding, long-distance touring, and demanding off-road adventures. Why Choose the Interloc Racing Design QB55 Cartridge BB? - Made in Japan with high craftsmanship standards - Sealed bearings for weather resistance and low friction - Easy installation with standard BSA shell and JIS interface - Dur

• sealed cartridge bearings featuring durable steel cups for long-lasting performance and reliability.
• Engineered with Japanese craftsmanship, the QB55 Cartridge BB ensures precise rotation and minimal maintenance for smooth pedaling.
• Designed with a traditional square JIS 2-degree taper interface, compatible with a wide range of cranksets and bicycles.
• Optimized for BSA shells with 68mm width and 103mm spindle length, delivering optimal stiffness and power transfer.
• Incorporates advanced engineering with materials to provide consistent, lightweight performance suitable for competitive and recreational cycling.