Rare Ronda for Colnago carbon cranks in 172.5 (see picture with measurements to confirm). The cranks were mounted on a bike that had near zero miles - bike was always used for display. These look to be the first generation Colnago cranks made by Ronda. They typically have the Colnago clover on the crank arm but these seem have never had the logo. Very neat carbon layup. Used on the Colnago Ferrari bike I’m told. Rings are marked Colnago. Cranks have no marking that I could find. These were found on the C35 and Ferrari model.