Even though it doesn't help you at all... Here is a funny story involving my 55 year old mother....

She has a LeBaron ragtop. She drives like most 50+ people do (safely etc...) I know I know... why did she get the lebaron.. that's a story in itself.

Anyway, she goes to a local shop for new tires since she ran the factory 4 for 40K (still good tread)... She tells the salesguy she wanted XYZ Brand at $120 each. The salesman laughs, looks at her and tells my 55 year old mother that the tires she chose are only rated for 200 MPH and for the lebaron, she should get ABC Brand rated at 320 MPH... She just looked at him, looked at me and then asked me. "Is this idiot serious? Please take my keys if I'm nearing 200 MPH" The said idiot turns and completes writting up the 4 tires my mom requests....

Edit for typo in miles on her original 4.