The Roadster F maintained chassis rigidity without any gain in curb weight, eschewing conventional thinking by not strengthening the sills, a process which would have needed more than of reinforcement. Pagani instead used racing car materials, and construction techniques, strengthening the firewall structure of the chassis tub together with billet alloy braces that connected the points where the roof rails would have joined. The windscreen was also strengthened for safety reasons. These techniques enabled the Roadster to have virtually the same weight as the coupé, .