TITGMER Round 130 BCD Chainring for SRAM 3550 RED APEX Narrow Wide Tooth Bicycle Chainring 42T 44T 46T 48T 50T 52T 54T 56T 58T 60T Aluminum Alloy Road Bike (54T)

• 110mm BCD support: Bolt Circle Diameter(BCD) is 110mm. Wrong BCD will not works. This 110BCD chainring for SRAM 3550 APEX RED Lightweight construction: The gear disc is made of 7050-T651 alloy structure, light weight but sturdy, with positive and negative teeth designed to prevent the chain from dropping, which is durable and has no problem for 2 years Hollow chamfering: Adopting a large number of hollow designs to make the toothed disc more beautiful and three-dimensional, The back is milled and chamfered to ensure strength while reducing the weight of the toothed disc Narrow wide tooth design: Ensures chain retention, effectively protects the frame from scratches, extends wear life, and reduces friction and noise,The surface is easy to clean Disk screw: AL7075-T651 one-piece CNC machined 7.5mm lengthened screw. The anode surface effectively prevents the screw from loosening and reduces abnormal noise