This is just my $.02. The tire manufacture makes a tire that might be installed on 5, 10, who knows, 20 different bikes. With each bike's weight, geometry, ability and power being different they are giving you their figures to what the specific tire can withstand, being load and pressure.
The bike manufacturer chooses whatever tire they deem suitable for each bike and recommend the proper tire inflation based upon the tires characteristic for acceleration, traction, braking, cornering and anything else they see fit to figure into the equation. This is why I wold suggest going with what the owner/service manual suggested pressure instead of the sidewall.
BUT!!!!!! With all of that said.........suit yourself and do as you please.
The bike manufacturer chooses whatever tire they deem suitable for each bike and recommend the proper tire inflation based upon the tires characteristic for acceleration, traction, braking, cornering and anything else they see fit to figure into the equation. This is why I wold suggest going with what the owner/service manual suggested pressure instead of the sidewall.
BUT!!!!!! With all of that said.........suit yourself and do as you please.