Feature 1Made of premium aluminium alloy, hollow design, which is lightweight, adding no heaviness to bike 2High strength and deformation resistance, durable for long time use 3Standard accuracy machining, which ensures ultimate chain retention, increases service life, and reduces friction and noise 4170mm crank arm length without any overlap of crank arm and chain ring bolt 5A good replacement for bike repair, compatible with many bike modelsSpecification Features: 1. Made of premium aluminium alloy, hollow design, which is lightweight, adding no heaviness to bike. 2. High strength and deformation resistance, durable for long time use. 3. Standard accuracymachining, which ensures ultimate chain retention, increases service life, and reduces friction and noise. 4. 170mm crank arm length without any overlap of crank arm and chain ring bolt. 5. A good replacement for bike repair, compatible with many bike models. Specification: Material: Aluminium Alloy Color Options: Black; Silver BCD: 130 mm (suitable for 107-110mm) Arm Length: 170 mm/ 6.7 inch Fit for: pedal diameter = 9/16 The distance from the center of the plate nail to the center axis: Approx. 65mm / 2.6inApplicable bottom bracket: Approx. 107-110mm / 4.2-4.3in Weight: Approx. 555 g Package List: 1 * Pair of Crank Arms .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Note:Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.