Wow... really nice looking auto racks. Would fit perfectly in the mid-late 1960's... the end of the era I model. $40 bucks MSRP will probably go about $30 after discounts... sigh... this will make some modelers irate. I think they will be worth the $30 a piece though... I just won't be able to get too many. They will be a welcome addition.
Athearn states minimum radius of 10" (with 12"+ as recommended). Must wait and see how that works out.