I'm able to fix the front flat tires much more cheaply: just the cost of the inner tube about 6$. but the flat tires happen most frequently in the rear.
the problem is I can't remove the rear wheel myself because the frame doesn't fit perfectly. so, it's nearly impossible to remove the rear wheel unless you're really talented mechanically.
the problem is I can't remove the rear wheel myself because the frame doesn't fit perfectly. so, it's nearly impossible to remove the rear wheel unless you're really talented mechanically.