Trust me, in North America it is now virtually impossible to find a 15-inch knobby tire which will fit the RX3's rear wheel.
My ZS200GY-2 came stock with the same wheel sizes as the RX3. We have been searching for years, and we have been unable to find a knobby tire which will fit the rear wheel of the Zongshen Sierra, or the new Zongshen RX3.
However, such tires are readily available in China, so CSC should not have any problem stocking up on them. A nice side benefit is Zongshen Sierra owners will also have a source for knobby rear tires.
However, CSC will be the
only source for these tires, and one will have to be content with their tire selection, and be
obligated to pay their price, since they will have zero competition.
Nevertheless, if one is content with street tires, he won't have a problem finding many different tires which will fit the rear wheel of the RX3.
__________________
Spud
"Never argue with an idiot. He will drag you down to his level, and beat you with experience."
Mark Twain
2015 Zongshen ZS250GY-3 (RX3)
2006 Zongshen ZS200GY-2 (Sierra 200)
2005 Honda XR650L
2004 Honda CRF250X
1998 Kawasaki KDX220
Mods made to my Zongshen ZS200GY-2:
http://www.chinariders.net/showthread.php?t=6894