65mm wheel with rubber (TPU) tyre
I built this for my Eclipson Pitts RC Plane, which has tiny wheels. The larger wheels make it a lot easier to take off and land on grass.
I used these in conjuntion with this modified landing gear struts and wheel pants: https://www.printables.com/model/83178-65mm-wheel-landing-gear-for-eclipson-pitts-s12 (I hope I'm allowed to cross-post like this!)
I printed the wheel hub in PETG (PLA would do also).
I printed the tyre with Spiderflex, but I imagine any TPU or TPE that is rubbery would work (needs to stretch over the wheel hub).