Enhance your bike’s performance and durability with this premium pair of crank arms, expertly crafted from high-quality aluminum alloy. Featuring a hollow design, these crank arms are lightweight, ensuring they add no unnecessary weight to your bike while providing exceptional strength and resistance to deformation. Precision-machined to standard accuracy, they deliver excellent chain retention, extend service life, and minimize friction and noise for a smoother riding experience. Key Features: · Premium Aluminum Alloy Construction: Offers high strength and durability, ensuring long-lasting use under various riding conditions. · Lightweight Hollow Design: Reduces overall bike weight without compromising structural integrity, enhancing riding efficiency. · Precision Machining: Guarantees optimal chain retention, reduces friction and noise, and increases the lifespan of both the crank arms and drivetrain components. · Ideal Dimensions: 170mm crank arm length designed with no overlap between the crank arm and chain ring bolt, providing a perfect fit and smooth operation. · Wide Compatibility: Suitable for many bike models with a pedal diameter of 9/16, BCD of 130mm (compatible with 107-110mm bottom brackets), and applicable bottom bracket widths of approximately 107-110mm. · Color Options: Available in sleek black or silver finishes to match your bike’s style. Specifications: · Material: Aluminum Alloy · Color Options: Black, Silver · BCD: 130 mm (compatible with 107-110mm bottom brackets) · Arm Length: 170 mm / 6.7 inches · Pedal Diameter Fit: 9/16 inch · Distance from Center of Plate Nail to Center Axis: Approx. 65 mm / 2.6 inches · Applicable Bottom Bracket Width: Approx. 107-110 mm / 4.2-4.3 inches · Weight: Approx. 555 g Package Includes: · 1 Pair of Crank Arms This pair of crank arms is an excellent replacement option for bike repairs or upgrades, combining durability, precision, and compatibility to ensure reliable performance. Please note that the product may be shipped as either the new or old version randomly, so kindly consider this before ordering.