New lightweight 520 conversion kits from Drive Systems USA. Kit is complete with a chromoly steel non-drilled front sprocket, heat treated steel rear sprocket and premium D.I.D. 520VX gold plated X'ring sealed chain cut to length. Stock gearing is 15/42.
Drive Systems steel conversion kits weigh over 2 pounds less than stock 525 kits but still maintain great strength and durability.