Fsa pro road triple chainringfsas pro road chain rings are the ideal replacement inner rings for your crankset machined from al7075 t6 they are ramped and pinned to ensure that shifting is precise and smooth with no chain suck the pins are stainless steel which resists corrosion they feature a 5 bolt pattern and are compatible with sram and shimano featuresprecision cnc machined a7075t6shifting ramps and stainless steel pins for outer and middle ringsblack anodised with cnc detailslaser