Young Ed - I have not, would not, and am no where near as presumptuous as to question anyones strength or speed.
All I want to do is work on my core and upper body strength, and was seeking to tap in to knowledge that you guys on this forum might have that I do not.
I know that probably every cyclist on here could out sprint, out pace and out endure (if there is such a thing but it goes with the theme) me on my bikes at any time, everytime. I am in no place to question or doubt anybody.
I am sorry I even posed the question now.
Dont be sorry. It's a valid question you asked and I gave you a very valid answer.
Anyway your real question was where to get a tractor tyre. Have you any farms close by you could go ask?