Tire Tread Worn out Very Fast 9 months ago I bought a Cruiser bike for riding around my neighborhood, and over that time the tread has worn out completely to the point you can see the cream surface that the interior of the tire has.

My question is, is this normal? For me, this seems very fast for a tire to wear out. In the past I've had mountain bikes and their tires lasted for years and still had plenty of tread. 

So is this problem due to a cheap tire, or something else?
Cruiser bikes tend to be constructed for the mass consumer market. Even if the price of the bike isn't cheap, the components often are. 


The big balloon tires that are put on them tend to have soft rubber compounds that allow for a soft ride -- but quickly wear away. The white or cream sidewalls  that are popular on cruisers don't have UV protection in their rubber compounds so they also tend to deteriorate quickly.
If you have a rear coaster brake (which tend to modulate poorly), you have to be careful as it's easy to drag/skid the rear wheel and wear down the rear tire down considerably. 


You can get a better wearing tire when you replace it. Harder rubber will be longer wearing but will provide for a harsher ride, all things else being equal.