I don't know anything about the Sirac's, because I run Tourance's(OEM). At 18.000km got them replaced with new Tourance's, although the old ones were not completely shot. At first I'd change to TKC's(mostly too for my allroad trip to the Ukraine, which failed), but the short mileage(about 6.000km), made me change my mind and go for the Tourance's once again. I'm happy with them, for me good handling in dry and wet weather and good mileage. So to keep this beautiful hobby affordable, I'll stick to the Tourance's, more so I only occasionally do offroad ridin', mostly gravel roads(farmroads and such).
Greetz, Hans.
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