Demeras Bicycle Round Chainring Aluminium Alloy Single Narrow Wide Chain Ring 104MM 40T 42T Compatible with SHIMANO Crankset(40T(104BCD))

【GOOD QUALITY】The bicycle round chain ring is made of high quality aluminium alloy material, which is lightweight and to use.Low malfunction rate, prolonged maintenance period and high reliability. 【PERFECT SHAPE】Ergonomic shape utilizes the stampede acting efficiently to create more stampede traction,making you more comfortable and easy to ride.Ergonomic design gives you a better experience. 【COMPATIBLE WITH】tHIS single narrow wide chain ring is compatible with most crankset, fit for AM/XC bicycle.A perfect replacement for bike repair.Please sure the size and material that you need before buying the products. 【HOW TO USE】The positive tooth corresponding chian tooth is wide, tooth corresponding negative chain is narrow.So that each of the teeth can be fully inserted into the chain,ensures ultimate chain retention,increases wear life,and reduces friction and noise. 【GUARANTEE】If you are not satisfied with our product you received, you can send emails to us at any time. We will reply you instantly and help you solve your problem.