I'm in the process of building a Ziroli P-40, I bought a set of used robart retracts with pretty worn down tires. I've been looking around a lot so far, but it seams like I can't get these tires replaced.
I know they were originally from Byron, and Iron Bay actually answered my e-mail and confirmed they sell those, but I can't reach anybody from Iron Bay anymore.
I'd like to buy a set of diamond cut treads for my P-40, does anybody know a good source for them? The tire size I'm looking for is 5 1/2"
Here is a picture from my old ones.