Everyone runs wider tires than the manufacturers say is safe.

Rim manufacturers claim you will die if wide tires on narrow rims because they want you to buy wide rims.

Mavic said the opposite and published a so called "engineering report" which said that running wide tires on wider rims ruined handling and posed a safety risk. The engineer's findings were very convenient given that Mavic didn't offer wide rims at the time. Now they offer wider rims and the engineering report is nowhere to be found.