Well, the concensus of those of us that have tried alternate tires completely disagree with the faceless engineering rep frm B'stone USA who purportedly said this "He also acknowledged that, if I use the EXED MAX, that "BRIDGESTONE doesn't have, and is not planning on having a 16inch tire, appropriate for the Rocket." Since the tire was not specifically homologated for the R3, I suppose he said what he said to cover the corporate derriere from any preventable liability exposure.
Art (IMFASTTOO), who has been in the motorcycle business for nearly 50 years and is a true "expert's expert", also spoke with a senior Bridgestone motorcycle tire engineer when the Exedra Max was first introduced. Although he told Art that Bridgestone would not specifically/publicly endorse the tire for use on our Triumphs (for the very same corporate aversion to liability risk, a practice, btw, that is the norm in the tire business), he was assured in no uncertain terms that the tire was absolutely safe to use on our stock wheels and that it has certain performance and wear characteristics that make it a preferential choice over most all other tires that are compatible with our rims.