Tyre changers - are semi automatic any good? Why get a simplified version if you can have a more advanced variant? Well, first up, the best choice is the one that really fits your needs. If you do tyre jobs rarely, then why pay more for an automatic machine with a RUNFLAT arm? A semi-automatic tyre changer would be handy at any car workshop or tyre bay. Even though they are not as quick as the automatic ones, they are a great choice for those on a tight budget. You can also get a motorcycle tyre changer off us.