All of our N gauge and OO gauge models are designed for a minimum radius of Peco set track 2nd radius curves (and points).
For N gauge that equates to 10.375 inches/265mm.
For OO gauge that equates to 18 inches/438mm.
That isn’t to say that some of our models won’t go round tighter curves – some will – but we won’t guarantee that all will.
Our experience is that even second radius curves are very tight curves but we understand that there is a balance between the size of curves vs the push for detail and accuracy.