I´d like to offer my opinion on over sized tires. I have a shinko Trailmaster 150 - 70 R17 on the front. It´s a few sizes oversized and it´s also a rear Dual Sport tire. It has far greater turning response. It took me a few miles to get used to the extra turning ability. The bike now cuts instead of weaves. Looks really good and has much more traction than even the Avon that it replaced.