I want to ride faster

[Triskeliongirl]

....but what do you mean by "where rotating weight will make a difference"? -can you explain?

Rotating weight means weight that is related to movement, i.e. wheels, tires, crank set, pedals. Cutting rotating weight increases speed even more than non-rotating weight, i.e. the frame, handlebars, etc., which is why it is often recommended that folks with hybrids try putting lighter skinnier tires on their bikes in an effort to improve speed. That is why some folks spend so much money on super light wheels for their racing bikes. In general, when you decrease tire width you also decrease tire weight (less rubber unless you purchased an unusually heavy 28c tire), which is why the laws of physics say your new tires should be faster. BUT, maybe you are comparing apples and oranges, i.e. fall rides to winter ones. I know my speed is slower on a cold day, or on a day I am a bit under the weather than on a nice sunny day. So, maybe you need to give your new tires some time.