These chainrings are made from high quality material, make suring they can handle the abusive ways of the trail.The drilled steel and thicker 6061-T6 CNC aluminum alloy rings provide superior rigidity,64 mm/104 BCD chainrings to fit all standard cranks with 4 bolt, 104 mm spiders. 42-32-24T Steel, 42-32-24T Steel /42T Aluminum Alloy, 38-26T Steel/Nylon) Chainring: Teeth: 24/26/32/38/42T Speed: 3x10S(42+32+24t)、2X10S(38+26t) Material: Steel(24/26/32/42T),Steel+Nylon(38T),Aluminum(42T) BCD: 104mm(32/38/42T),64mm(24/26T) Feature(only include 32/38/42T):special teeth profiles design is lead to the chain leave the chainring easier when variable speed happened.Secondly,because of the concave and convex design,the chain has an excessive place ,so the riding speed can be smoother Package Include.
