rorz

20 x 2.25 will fit fine, if your tyre says 20" a 20" tube will fit it. I know it's not one of your options but Slime make great tubes that repair from forn and simmilar punctures. They are also garented for 2 years (against the afformentioned), they are available from Halfords for 7 or 8.99. Rory