[SpudRider]

The stock tires on the Zongshen RX3 are the following sizes.

Front: 100/90-18
Rear: 130/90-15

These tires are the same size as the stock tires on the Zongshen ZS200GY-2. Therefore, I surmise the rims are the same size.

Front Rim: 2.15-18
Rear Rim: 2.75-15

Finding a good, domestic tire for the front rim is relatively easy. I first intend to wear out the stock, CST, C6017 front tire. The stock tire is not available for sale in North America, so I will probably replace the front tire with a Shinko 244 in size 3.00-18.

http://www.motorcycle-superstore.com...CqLBoCWvzw_wcB

Before I switched to a 21-inch front wheel on my Zongshen 200GY-2, I mounted a Shinko 244 on the 18-inch front wheel, and it performed well. Here is a photograph of the size 3.00-18 tire mounted on my Zong's front wheel.



This is a nice, dual sport tire with an attractive price of $30.99.

I also intend to wear out the tire on the stock, 15-inch rear wheel. After the rear tire is worn, I am switching to the 17-inch rear wheel, since you cannot buy a 15-inch knobby tire anywhere in North America. However, there are several nice choices for 17-inch tires.

One choice is the Shinko, 244 rear tire in size 5.10-17.

http://www.motorcycle-superstore.com...edWBoCLoLw_wcB



Another nice choice is the Shinko, 700 rear tire in size 5.10-17.

http://www.motorcycle-superstore.com...miMhoCRpjw_wcB



Yet another good option is the Kenda, K270 rear tire in size 5.10-17.

http://www.motorcycle-superstore.com...pose-rear-tire