TRUCKs come in varying widths and heights. The most common width would be the narrowest width, called 5.0(Venture) or 129(Indy) or 145(Thunder), etc....
The parts you need to assemble a skateboard are: 1) Deck 2) Grip Tape 3) Trucks 4) Wheels 5) Bearings 6) Bolts & Nuts The top of the DECK is covered...