Before you pakc up this bike and head off to school, realize the limitations of a road bike on a crowded campus full of pedestrians and other bikes vs. a mountain bike.
The road bike's geometry, the way the bike is set up and laid out in its frame angles, and the riding position of the bike is geared toward riding fast down a road in a straight line. Slow speed handling and maneuvering is NOT its forte, to say the least. At very low speeds, road bikes are not the most forgiving machines in quick accident maneuvers.
A mountain bike, with its more upright riding position and slacker frame angles, is much easier to handle at verly low speeds, like below 10mph, and has a more forgiving ride. The mtn. bike, with its larger tires that hold more air at lower pressures vs. road bikes, give a more comfortable ride, although sacrifices speed and acceleration as a consequence, along with the gearing a mtn. bike has.
Another point already raised.....steel wheels are not good for stopping power at all, esp. when ANY moisture is added to the equation. If youtake this bike, go to a local bike shop and buy a set of NEW pads......they'll be very cheap, probably around $4 a wheel. Put them on and pray you don't have to do any quick stops, such as a pedestrian suddenly setting out in front of you, or a car door opening unexpetedly.....you're going to eat either or both with that bike.
My suggestion is: look into WalMart's Schwinn's........not the Huffy or Roadmasters or anythign else.....just the Schwinn. I know....WalMart. Blech!!!! But if an 18" mtn. bike is the proper size for you, then those Schwinns are the proper size, and believe it or not, the Schwinn frames are still made in the same Chinese factories that made them before Schwinn went bankrupt and Pacific Bicycles bought the name out..........and they're the same Chinese frame factories that Giant and Trek source their cheapest bike frames from. (I was a bike shop mechanic and salesman for 7 years and I put hundreds of Schwinns, Giants, and Treks together. The bikes, while box each had the name of the company emblazoned all over them, came from the same factory group in China.)
The only difference I've been able to tell about the "new" Schwinn bikes in WalMart vs. the "old" Schwinns we used to buy from Schwinn is the rear wheel........bolt-ons now vs. quick release wheels before. Same mostly Shimano, albeit lowend stuff, components, same aluminum frames, etc. You'd be better off with on eof these instead of that old road bike death machine...........and the Schwinn will only set youback around $150.