Hey there,
I have used the retreads for many years, were good value for money, they were manufactured here in WA and cheaper than over priced genuine tyres.
I used to buy 10-20 at a time , get them cheap , they lasted well and were well worth it.
Seemed to have wide treads on the rear ,so they lasted ok.
The fronts were a replica of the old Dunlop 752(stopped makin em) , which were an awesome tyre , the problem with the old 752 was later in the life of the tyre ,on hard terrain ,they broke the side treads off, but grip was awesome. I imagine most tyres get a flogging and used on terrain they were not really customized for in the first place at times.
On the WA Retreads they have reinforced the outer lug on the front 752 replica ,so they don't break off, which is great. Same problem though toward the end of the tyre life , they break off the outer lug , but the tyre is pretty much done for by then anyway.( abused on terrain with hard sharp grippy rock)
I used to request the carcasses of the retreads come from a Michelin or other soft shell , that was flexible/pliable and quick /easy to change also ,when I used to have the odd race yrs ago.
After a few years in WA ,genuine tyres were getting up around $140-150 for a rear. Then whole sellers and resellers of tyres started to drop the price , like Michelin, with the popular S12 tyres, and put things back into perspective.
My personal experience is, any 550 -650 berg , if you give it some, it will shred a tyre in 3 hours, taking the edge off it pretty quick.
These days, I care nothing for tyres , don't race, just out for the ride , but love the sliding and balance of the bike front and rear, into and out of corners with no tyres, it sorts you out quickly and keeps you on your toes and interested, ha ha.
Cairns, I remember riding up the Goldsbrough river , up the old Malanda Mail Trail to Atherton about 20yr ago , good stuff, then the twistys down the hill back on the road!! Beautiful countryside..xr600..
Cheers