These are the hawk 250 shinko 244 tires I use for my bike. You can see my install guide on this page https://hawk250.com/installing-shinko-244-tires-hawk-250-dual-sport/ You can see the tire sizing guide also linked on the above page.
Front – Tire Size:3.00-21 51L
Rear – Tire Size:4.10-18 60S
Dual purpose street and trail design DOT approved, tube type 4-ply rating All sizes designed for front or rear fitment The use of the tire and other vehicle data and information accessible through this webpage is limited to persons located in the United States of America and Canada.ALTHOUGH THE DATA IS BELIEVED TO BE ACCURATE, NO WARRANTY OR GUARANTEE IS MADE REGARDING THE QUALITY OR ACCURACY OF THE DATA.All data should be verified by a tire professional, the vehicle placard (typically located on an inside door panel or on frame), and/or the vehicle owners manual.