Transradial catheterization is associated with radial injury and there is a move to downsizing procedures to minimize complications. For the first time in the literature, we report a feasibility study of a sheathless technique that enables both 5Fr diagnostic and PCI cases using balloon assisted tracking (BAT) technique. This technique was prospectively performed in 60 consecutive patients using conventional catheters. The procedure was successfully performed via the radial artery using a sheathless technique with BAT in 93.3% of patients. All patients had a patent radial artery following removal of the Helix device and there were no recorded access site complications. We have shown that our virtual 3Fr sheathless technique using BAT is feasible with success rates of >90%.