^^ And that might be perfectly alright for you & your riding, road surfaces, loads etc, but it may well be very wrong for someone else riding their Spyder elsewhere, or even if they are riding your Spyder with the same loads on the same roads - the 'correct' tire pressure for a given tire on a Spyder (or any other vehicle) that you are riding depends mainly upon YOU, your riding style, your loads, the surfaces you ride on, and a whole heap of other stuff... and as little as 1 psi of pressure difference can make a vast difference in tire behaviour, traction/grip, & wear/longevity. But what I run in that given tire may well be totally useless or even downright dangerous for you, especially if I ride in a different manner, on different roads, or with different loads!! :shocked:
And the 'pressure recommendation' on the tire placard is no more than a vaguely educated 'best guess' compromise aimed at suiting the widest range of potential riders & loads, surfaces, etc that BRP & the tire manufacturer can come up with. Change from the OE spec tire or the OE spec loads & roads, & while that placard may provide a good starting point for you to work out the 'best pressure' for a given tire, the optimum pressure will invariably be different if you are running a different brand &/or construction tire or have varied any of the other possible parameters!
As a number of us have been saying for a while, altho maybe not in quite these terms - Bigger or more robust air bags (ie tires) need less air to carry the same load on the same roads!
In Aust we have access to the Australian Tyre Manufacturers Handbook which provides a 'start pressure' for the each specific tire size carrying a specified load (I'd guess there is something similar in the States) and from that given start pressure for the specified load, drivers/operators can 'fine tune' their working pressures to suit their changes in all the other driver/load/road specific variables - but there is NOT a 'one size fits all tire pressure' for pnuematic tires, despite what some vehicle manufacturers (who may benefit financially if you only ever use their specified tire size & brand) would like you to believe! :sour: