Laroal 4pcs Bicycle Bottom Bracket Screws Crank Arm Bolts M15 Threaded Chainring Crank Installation Screws Compatible with Electric and Standard Bicycles

• Compatible with Various Bicycles: These bottom bracket screws are designed for use with a wide range of bicycles, including electric bikes. They are compatible with crank arms and chainrings, ensuring a secure connection for smooth pedaling.
• Durable Steel Construction: Made from sturdy steel, these screws are engineered for long-lasting performance. They offer high strength and resistance to wear and tear, ensuring they stay firmly in place even after extended use.
• Easy Installation and Removal: The screws are designed for easy installation and removal using an 8mm hex wrench. Their precise dimensions allow for quick and efficient maintenance without the need for specialized tools.
• Prevents Loosening: Featuring a special locking design, these screws help prevent loosening over time. This is particularly important for high-performance bicycles and electric bikes, where secure crank arm attachment is critical for safe and efficient riding.
• Ideal Size and Design: With a screw size of 21.7mm x 21.5mm, a stud length of 13.4mm, and a bottom outer diameter of 15mm, these screws fit standard and electric bicycle crank arms, providing a reliable solution for fixing your chainrings or crank arms securely.

Features: These 4 pieces of bicycle bottom bracket screws are designed for installing crank arms and chainrings, with a specialized M15 threaded design. They are built from durable steel, making them perfect for heavy-duty use on electric bikes, mountain bikes, road bikes, and other bicycle types. The screws feature a precise threading system that ensures a tight and secure fit when assembling your crankset and bottom bracket. With dimensions of 21.7mm x 21.5mm, a stud length of 13.4mm, and a bottom diameter of 15mm, they are versatile enough to be used across a wide variety of bicycle models. Their unique locking mechanism prevents loosening during rides, ensuring that your bicycle's crank arms stay securely in place. The screws are designed to withstand the pressure from pedaling and offer consistent, reliable performance over time. Specifications: Material: Steel Screw Dimensions: 21.7mm x 21.5mm Stud Length: 13.4mm Bottom Outer Diameter: 15mm Thread Type: M15 Tool Required for Installation: 8mm Hex Wrench Compatibility: Suitable for standard bicycles, electric bicycles, mountain bikes, and road bikes Locking Mechanism: Prevents screw loosening during use Package Includes: 4 x Bicycle Bottom Bracket Screws