Cheers for that.
Them rear tyres are very similar to the Duro Tyre 110/80-80 but at £57 each
i would try those.
Yes other than the duro one is more pointed, and needs a 3.5 inch rim. These were developed for the honda monkey bike. Especially for their 2.5 and 2.75 rims. They "open out" more than the duro 110/80-8 tyre on the same 3 inch rim, so are more flat and better suited to our use. But I may still use the duro ones. As I have them. Depends how they look on the 3.0 rims I am creating. I hate pinched look tyres!
Expressos link is to a 3.50 tyre. Its as sall as it is wide. Its 3.5 wide so narrower, and its also the tallest diameter of the 3 sizes. Its a 15 inch diameter. It ideally needs a 2.5 to 2.75 rim.
The 100/80 tyres is smaller diameter at around 14.6 inches. But 4 inchs wide. So looks a fair bit fatter.
The 120/70 tyres are smaller again at 14.3 inches, but much lower profile as used on my salsa, and they need 3.5 inch to 4 inch rims. So close to stock diameter, but 5 inches wide.