180mm is average size for a longboard truck. bigger than that the board will become diftier and theoretically more stable. any thinner and the board will grip more but wheel bite may become an issue.
You should always have the same size trucks
somthing like a original apex 37
A tiny one.
longboard races
anything from 25" to 35" depending on size.
VOLADOR 42inch Freeride Longboard. Playshion Drop Through Longboard Cruiser. Magneto Bamboo Longboards. JUCKER HAWAII Original Longboard. Slendor Longboard 42 inch Drop Through. Landyachtz Switch Longboard Complete and Colors.
its not the longboard...its the longboarder
Silverfish isn't a longboard manufacturer, they are a longboarding website/forum.
The answer to your question is in the questiong itself.
The disadvantages of using a cheap longboard are that they tend to be made of stiffer wood and when you ride the longboard there is no give or flexibility which gives a very unstable ride.
the force of gravity, natural force(weight), the applied force(your pushing off of the ground with your foot), and the frictional force.
44" - 48"it kinda depends on what you want. i weigh 95lbs. and i have a 46"