Not quite what I was expecting as a first purchase of a Walthers product
The wheels do hit the coupler box on 18"R curves...to fix this I used a 1MM nylon washer between the trucks and railcar bodies...and then compensated for the raised coupler height by using a Kadee #142 overset coupler on each end of each car. (I bought 8 cars...16 washers and new couplers
You'd think that a Mfgr as old as Walthers would have caught this issue and corrected it but I guess their priorities are not in line with Mine