This question if probably from the same person who asked "What type of metal are hws beyblades made of?", but the answer is still "zinc alloy".
the track is for letting the bottom to attach to the track a the track is for attaching the metal wheel and hybrid wheel
yes, they are real. for example: storm pegasus has a hybrid wheel, because it says "hybrid wheel" on the energy ring.
a AWD Hybrid is a 4 wheel drive Hybrid
the heaviest fusion wheel out of all the beyblades would have to be the diablo wheel from diablo nemesis from the 4D series weighing higher by 12.5 grams for the whole bey but the wheels im pretty sure the diablo wheel would only weigh a little like 5.5 grams heavier than the twisted wheel from twisted tempo.
The 2010 Toyota Highlander-Hybrid has all wheel drive.
The 2012 Toyota Highlander-Hybrid has all wheel drive.
The 2013 GMC Yukon-Hybrid has rear wheel drive.
The 2012 Chevrolet Tahoe-Hybrid has rear wheel drive.
The 2011 Chevrolet Tahoe-Hybrid has rear wheel drive.
The 2010 Cadillac Escalade-Hybrid has rear wheel drive.
The 2008 GMC Yukon-Hybrid has rear wheel drive.
The 2007 Toyota Highlander-Hybrid has front wheel drive.