feature: *Brand new and high quality *Made of high-quality materials, *High strength Aluminum 7075-T651 *Double Chainring 110bcd forShimano 105 R7000 R8000 R9100 Road Bike *53-39T Chain Wheel *Good compatibility, for 110BCD cranks Specification: Compatibility: for shimano FC-R9100 / FC-R8000 / FC-R7000 Speed:10s / 11s / 12 Material: AL7075 Heat treatment: T6 Colour: Black Size: 53-39T Weight: 553-39T 157g / Trim Bolts 29g *Product Name:chainring *Material:al7075 *Size:53-39T *Color:black Package content: 2 chainrings(39T +53T ) 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. Superior quality - This accessory parts, made of durable materials, are durable and not easy to wear or damage, ensuring long-term stable cleaning results and long-lasting service life. Easy to Install - The installation is simple, and the accessory is easy to install and replace. Fine Manufacturing - Precise processing and adjustment ensure that each parts are consistent, improving the machine. Well design - User friendly design allow you to quickly install them onto yours, ensuring a secure fit and saving valuable time during maintenance. Excellent After Sales Service - We focus on quality and after-sales service. If you are dissatisfied with our products, please let us know. We promise to give you 1655% satisfactory after-sales service. No risk. Don't hesitate. Just buy it.