MTB Bike Crankset Hollow Integrated Double Chainrings 53‑39T Aluminum Alloy Bicycle Crank

Feature: 1. Aluminum alloy integrated double disc, no other firmware, stable upgrade, reduce weight. 2. CNC exquisite processing, primary color aluminum edge, firm and beautiful, the details show professional. 3. Shift pin, fast gear shift, tooth loss design, CNC exquisite machining, anodized anti‑oxidation. 4. Opposite pull type locking screw, connect between the crank, screw tight connection does not drop. 5. Hollow crank leg weight reduction, the crank using hollowing technology, there are two small circles at the bottom, can be punched here, dug out two hollow holes, greatly reducing the weight of the crank, while improving the strength of the crank. Specification: Item Type: Mountain Bike Crank Chain Ring Integrated Double DiscColor: BlackMaterial: Aluminum Alloy Weight: Approx.988g 34.9oz Bottom Axis: Threaded Bottom Axis Bottom Axis Length: 90mm 3.5in Integrated Double Disc Diameter: 218mm 8.6in Number of Teeth of Integrated Double Disc: 53 39 Teeth Integrated Double Disc Features: Shift Pin, Fast Gear Shift, Tooth Loss Design, Cnc Exquisite Machining Hollow Integrated Chain Ring Shaft Length: 108mm 4.3in Hollow Integrated Crank Leg Length: 170mm 6.7in Integrated Crank Set Technology: Full CNC Machining, Anodized Anti oxidation Features of Integrated Crank Set: the Inside of the Crank is Formed into a Geometric Cavity, Which is Lightweight and Provides Higher Strength. Package List: 1 x Integrated Double Disc1 x Threaded Bottom Bracket1 x Threaded Bottom Bracket Left Firmware3 x Threaded Bottom Bracket Washer1 x Left Crank Integrated Chain Ring1 x Right Crank Teeth Crossed Legs1 x Crank Washer3 x Screw