we purchased the Weedeater One Riding lawn mower. the right front tire was flat when we got it home. we filled it up with air, but only holds the air for a day and then goes flat again. i check the valve stems, but they were tight. we request you send a new wheel and tire and RMA the one we have that goes flat. we purchased the mower about two and a half weeks ago. we had thought we did an inquiry last week but apparently our registration did not take.