I left Germany with Metzler Tourance on my R 100 GS last summer and would do it again: 90% tarmac, most of it good with few potholes. Very good gravel roads between Chita to Khabarovsk, so no need for knobbies.
If you stick to the speed limits (strongly advised because of speed traps), the tires will last very long: I changed tires in Ulan Bataar after > 22000 km (zigzagged around on my way to Mongolia): front tire was done, but rear tire still had around 2 mm.
Last opportunity to buy tires before Vladivostok is Novosibirsk, I posted the GPS-coordinates somewhere here on HUB. No choice of tires though, especially for 17" and 21" tires.
PS: Should add that I did use knobbies (TKC 80) from Ulan Bataar to Vladivostok (so including on the Chita to Khabarovsk-part). But I still think you would not need them.
Last edited by Lars; 15 May 2006 at 16:55.