Kato N scale concrete double track question

[Ngineer]

Kato offers

Concrete Tie double track curved with radii 315 and 282 mm (20-183) and have added

Concrete Tie double track curved with radii 414 and 381 (20-181).

Why don't they offer radii 381 and 348 mm?

This would correspond to their single track radii.

Any ideas why they did this?

AFAIK there is no 414 mm curved single track.

BTW, the next jump is what you would expect: From 414 (plus 33) to 447 mm and 480 mm (20-185).

   Javier

[Englewood]

Personally, I'd love to see an even bigger radius set.