Whatever you need to replace your existing crank arms or build up a new bike, our Dioche crankset with reasonable price and high quality, which will meet you demand! Features: 1. Aluminium alloy material, hollow design, durable and lightweight 2. High strength and deformation resistance 3. Fine machining, extends your bike's life and reduces friction and noise Specification: Material: Aluminium Alloy Color Options: Black; Silver BCD: 130 mm (suitable for 107-100mm) Arm Length: 170 mm/ 6.7 inch Fit for: pedal diameter = 9/16 Weight: Approx. 555 g Package List: 1 * Pair of Crank Arms ANTI DEFORMATION: The bike cranket is made of premium aluminium alloy, which is of high strength and not easy to deform, durable for long-term use LIGHTWEIGHT: Hollow design, which is lightweight, adding no heaviness to you bike, make riding more comfortable and relaxing EFFICIENT PERFORMANCE: Standard precision machining, which ensures chain retention, increases it;s service life, and reduces friction and noise, you won't be annoyed by unpleasant sound, giving you a wonderful using experience HIGH EFFICIENCY: 170mm crank arm length without any overlap of crank arm and chain ring bolt, which ensures mountain bikers to ride anywhere with it and increase mountain riding efficiency WILD APPLICATIONS: A good replacement for bike repair, compatible with many bike models. Suitable for road bicycles, mountain bikes, city bikes and single-speed bikes etc