The InnoPet® strollers are sturdy, but always keep in mind that obstacles can cause damage to it. When you go down a sidewalk you have to lift the buggy slightly towards you so that the front wheel comes loose from the ground. Then push the buggy forward and let the rear wheels roll slowly from the sidewalk. Then you can place the front wheel on the surface again.
Never bump your buggy against a curb, this can damage your frame and is not covered by the warranty!
Metal rims / parts need maintenance. It is not a stainless steel material. For example walking on the beach, pay attention to walking on paved surfaces in order to prevent damage to the wheel suspension, for example. Good maintenance prolongs the life of your stroller.