It means calm and reserve to me, perhaps coupled with a careful observation of one's manners. It's not exactly a manner of dress or speech- more a way of behaving. Bashfulness and modesty doesn't bring anything but good.
The Rca frame and basic hardware weigh less than 1.5 pounds, keeping the bike's total built weight to about 10 pounds. Tour de France riders must add ballast to hit the race's 15-pound minimum. Drag consumes up to 50 percent of a racer's energy when he's in a pack, 90 percent when he's riding alone. The tubes of the Rca frame are teardrop-shaped in cross section, improving aerodynamics.
And, yes, the total weight of Patrick plus her race car is 40 pounds lighter than it is for almost every other driver in the NASCAR Sprint Cup Series. Why? Because, for practical purposes, the NASCAR rule book assumes that every driver weighs at least 140 pounds. By rule, a Sprint Cup car must weigh 3,300 pounds.