
3 inch or 2 inch FIA harness? The shoulder strap decision explained
A 3 inch and a 2 inch FIA harness are not two versions of the same belt. The shoulder width decides whether you can run it without a frontal head restraint, and the lap width is a separate choice again. Here is how to pick, with the OMP, Sparco, TRS, Schroth and Willans ranges laid out side by side.









