The answer here depends on the lady. Personally I think a vacuum is a fine Christmas gift but I’ve had this discussion around a table of about 80% women and they pretty much told me it is a very bad idea. I feel the same group would nix the tires just as much. Yet, I’m giving my wife an Eden Pure heater for Xmas so I’m still treading in dangerous waters.
If the boyfriend gave multiple gifts the tires might go down better. Perhaps a ring, or bracelet in one box and a gift card for tires in another?