2002 Dodge Caravan. Front tires worn to the belts only only the very inside. What pieces are worn out. Thanks

I hope we can get this solved before you have an accident!
The very most common cause is a "belt" that has slipped or come apart inside your tire. If so, it may blow out any minute.
Check it one of two ways. 1) jack up that end of the van and spin the tire by hand, and see if you can see the "bubble" on the tire. 2) Drive slowly (about 5 or 10 miles an hour) and have someone in another vehicle drive along side you and look at your tire.. They should see the tire wobbling.
Also, though it is not too likely, check the wheel (Not the tire) and see if it is bent or loose or whatever. You can do that the same two ways. Be blessed..

take it to a tire shop and get the tires balanced and the alighnment check

I would suspect one of several things. First I would look at the tires to see if you
have a broken belt, (bulging tire or visually misaligned tread pattern is a clue for this)
or missing wheel weight (you will see where it was by a little rusted area, some are mounted inside on the rim). My PT cruiser had the same problem
and it turned out to be a cupped tire due to wheel alignment. Check to see if the
tires are wearing evenly or just to the inside or outside to visually check for this.
There could also be excessive play in the steering components or even a worn out motor mount as my Dodge Caravan had. I would recommend
having the vehicle inspected for problems and a reputable tire store and a written
quote before any work is performed. Hope this helps.

Your spare tire is located underneath the rear of the vehicle and must be cranked down to remove using the long bar that should be mounted in the back on the inside of the van.

alignment is off or you have worn bad shocks or suspension bushings. have the shop inspect it.

Fluids, fluids fluids... especially your transmission, this I'd replace every 30K miles. Proper tune up, rear shock, front struts. Have the front-end checked for worn steering components, replace if needed, lastly all belts. Take care of it and it will serve you well or 1999 has 210K on it and starts and goes.
Good luck with it!
Tom

if your seeing tire wear on the outside,you will need tires rebalanced to make up for tire rubber worn away.

it shouldn't hurt the tire,but may cause a slow leak if the chrome is flaking off at the 'bead' where the tire seals to the rim.

should not have to remove anything you just put a wrench on the belt tensioner and it moves over. then remove and replace the belt. make sure you draw a belt diagram first if there isn't one under the hood.

hope this helps.
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there is a overrunning clutch on the front of these alternators that can get noisy..a replacement alternator is best bet to correct condition..make sure you check all items driven by drive belt.