Hi everyone,

Do any of you happen to know a source for the minimum radii curves Rivarossi models can handle? Specifically I have an italian Aln 668 railcar, (HR-2301) which I've converted to AC. In reverse it makes a nasty rubbing sound around curves, but in forward it is totally fine. I'm trying to sort whether something is broken/misaligned, or if it has a high(-er than Marklin) minimum radius, and for some reason that only applies in one direction.

Any advice is appreciated! The catalogues don't say anything, nor does the instruction sheet.

Thanks!