Vendo bielas kcnc nuevas sin eje pedlier 125 euros View attachment untitled.bmp ISIS drive 7075AL crank arms Fully precision cnc machined 7075AL chainrings, ramped,172.5,mm lengths 53/39T chainrings with spider bcd 110mm BB Width:68 or 70 mm Black Anodized 7075al chain rings bolts 505 gramos with chain rings Patented double hollow hole design