5,000kmは早いけど、やっぱり10,000kmぐらいで交換でしょ

4,500km
http://cdn.snsimg.carview.co.jp/minkara/note/000/003/310/115/3310115/p2.jpg

7,400km
http://poco-pen.villagewood.net/wp-content/uploads/2015/11/wpid-wp-14481989069181.jpeg

10,000km
http://www.kabocha.jpn.org/wordpress/wp-content/uploads/2016/10/20161022-084029.jpg