Description: Versatile Bike Crankset: This bike crankset is suitable for both single speed and variable speed bike, making it a versatile addition to your cycling equipmentSturdy Construction: The crankset features a 2mm thick steel disc and a 170mm aluminum alloy square hole crank, ensuring durability and long time performanceLightweight Design: This bike crankset is lightweight yet sturdy, offering an optimal balance between weight and strengthPremium Material: Made from quality materials including steel, aluminum alloy, and PP for enhanced durability and resistance to wear and tearPackage Contents: Each package includes 1 disc plate and 2 cranks, providing you with everything you need for easy installation on your bicycle Specification: Material: Steel, Aluminum Alloy, PP Size Chart: Crank: 17cm or 6.69inchThickness:0.2cm or 0.08inch Package Includes: 1 Set BikeCrankset Note: Please allow slightly errors 1-2cm differences due to manual measurement.