Thank you mate that’s very helpful I think.
Could you tell how much clearance you have left over between the frame tubes and the rear wheel?
According to me, the clearance of the rear wheel is a bit smaller than on the front wheel - on full size frames.
Do you think that is equal on Mini frames?
(Meaning that you have to expect clearance issues first at the rear wheel.)
Also, I’ve made an odd experience with Strida 16" plastic wheels in comparison to original 16" metal spoked wheels - they are “dished” different!
That means that some certain, wide tyres would fit on 16" metal wheels without touching the frame - but the same tyre on a plastic wheel will get in touch with belt or frame tube.