I will soon need to change the rear knobbly Metzeler MCE Karoo tyre on my GSA. The front is fine. I'd prefer not to mix brands but I can't seem to find a Metzeller supplier – with stock – on the internet. 🙁 So, I'm guessing that sticking with Metzeler might prove expensive? 😐 Can anyone point me to a dealer in Auckland that has stock or tell me if they've had good experience of an alternative brand?