ORIGINAL: RCISFUN
I have seen this on a bunch of the Asian imports, apparently tbey don't use bronze bushings.
If you lube them you are fine like it has been mentioned.
Rich,
Even bronze bushings will lock up if they get dirty. Hard particles such as sand will gall the bronze and lead to frozen wheels as described above. They can be a real problem getting unlocked and then you have to file them smooth to eliminate the friction. Regular cleaning and lubing will prevent this.
Craig