Have you ever been hit by a bird while riding?
a separate set sounds like a good idea,if you notice the difference that much,i own a gary fisher tassajara and a trek 3900. i do a lot of road riding and am plenty happy with the fat tires i run on them,right now i have a set of 2.1's on my fisher and i think they are kinda skinny , i really havent noticed any difference between and the set of 2.3's i had on it befor and my next set will be 2.3's i would run even fatter tires if they would fit
At the Big Bang energy is converting to matter, Fundemental Forces, and subatomic particles. That happens very fast. The universe we see is very uniform. For that to be true, Spacetime had to expand very fast or by special relativity the parts of the universe would get too far apart to stay in sync Spacetime itself expands and can do so at greater than the speed of light. Think of the common 2D analogy of Spacetime being a 2D rubber sheet with a grid pattern. Say the lines are 1 m apart. To a photon the square is always 1 meter ^2 even if you streach the sheet and if you could be an outside observer the square is 2 m x 2m (4m^2). Thus, seen from the outside, the universe can get very big very fast and yet stay in sync and uniform
