Was looking for that link too.
Thanks. I'll check them out. I'm leaning towards the spring ones as I like the idea of them flexing to break the mud off. Had a few too many times this year where I had to get out of the cab with the paint scraper to clean my rubber ones. I also haven't seen the Devloo system getting around anywhere in Australia, is it worth the investment?
@dankorange thanks for letting me know.If your soils are sticky the Needham ones are not for you. The type of material they use for the tire will not shed any mud and seem to attract mud as well. Only good in a no till situation with a lot of plant material on the ground
this is my experience with our heavy clay soils. Your idea of doing a trial is the best way, which is what we did and glad we did not do the whole drill with Needham’s