Description: *Brand new and high quality *Made of high-quality materials, *Used to replace electric bike，road bike,MTBbikes, fixie bikes part *design for square hole bike bottom,48T，52T larger chainring ，Fully meet your needs for speed *easy to use and install,good compatibility *With guard plate design to prevent chain drop and knock Specifications: type: bike crankset Color: black length： 170MM chainring： 40,48,52T weight： approx 700-750G Package included: 1x crankset Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data. Made from high-quality materials, our outdoor sports products are durable and affordable to meet your daily needs. Please check the product size and model before placing an order to ensure it is the product you need. When you encounter a problem, please contact us and we will help until the problem is perfectly solved. When you receive your product, whether you are satisfied or not, we want to hear your opinion. Every customer can enjoy free refund or exchange service for damaged/quality problem products.