Welcome to our store！</br> 1、The crankset chainring is made of strong aluminum alloy to ensure they are resistant to wear and deformation. 2、With ergonomic design, stamping is used to generate more traction to reduce the load on the legs or knees and ensure a smooth ride. 3、The unique teeth design increases the contact area of ​​the chain, prevents the chain from sagging, and allows you to easily pass on bumpy roads. 4、The narrow and wide teeth design of the chainring ensures that the chain is fixed, protects the frame from scratches, and reduces friction and noise. 5、Crankset chainring can be used without front derailleur, which greatly reduces the load on the bike and reduces the trouble of chain dropping. <div class="wang-edit-text"><p class="wang-edit-text"> <p class="wang-edit-text"> Item Type:&nbsp;104BCD&nbsp;Crankset Chainring Material: Aluminum Alloy Outer Diameter: Approx.176mm/3.9in Adjacent Aperture Distance: Approx.74mm/2.9in Diagonal Aperture Distance: Approx.104mm/4.1in Teeth Number: 42T <style> .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }</style> </div> 1 x Chainring&nbsp; Satisfaction - Our customers are our top priority. If you find any product problems after receiving the goods, such as damage and incorrect quantity of goods, please contact the seller immediately. We try our best to provide you with satisfactoryaftersalesservice</br>