["brand new and high quality\nFeatures:\nPremium Material: The mountain bike crank is made of high quality aluminium alloy material, which is high-strength and light-weught, preservative and wear-resistance, it is durable to use, can maintain a long service life. High Strength: This bike crank has strong axial strength and strong compatibility, which is A good accessory for remodeling mountain bike. Appearance: Our crank adopted lightweight and compact appearance, it can make your car more attractive.\nNarrow Wide Sprockets: The narrow wide tooth design, increasing the contact area with the chain greatly, so that each of the teeth can be fully inserted into the chain, increase the grasp force, make you no longer worried about the chain dropped, easy to pass through the bumpy road.\nThrough the modification single speed chain rings, reduced the transmission system greatly, completely abandoned the complex variable speed system,reduce the bike weight, looks more compact and simple, and also greatly improve your speed. Easy to use and to operate.\nRoad Bike Chainwheel or Crank only,other accessories demo in the picture is not included.\n\nSpecification:\nMaterial: Aluminum Alloy\nOptional Crank Length: 01, 02\n01 Crank Length: app.17cm/6.69in\n02 Crank Length: app.17.5cm/6.89in\nOptional Wheel Teeth: 30T, 32T, 34T, 36T, 38T, 40T\nColor: Black\nQuantity: 1 Pc or 1 Set\n\nNote:\nNo retail package.\nPlease allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.\nDue to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!\n\nPackage Contents:\n1 x Road Bike Chainwheel\n1 x Crank\nOr\n1 x Crank"]