Originally Posted by
staehpj1
Can you say more about how Amtrak treats folding bikes?
Amtrak's full-size, non-folding bike transportation policy is train-route and station-dependent. Our OP reports no problems on the routes he's taken so far with his regular bike. Their folding bike policy offers a generous 34" x 15" x 48" (860 x 380 x 1120 mm) and treats folders as hand luggage. You have to schlep it yourself, but on/off at any station.
https://www.amtrak.com/bring-your-bicycle-onboard
We've just stowed the folders with everyone else's dunnage:
My Dahon Helios fits in a 62" Samsonite Oyster, but it is a pain to pack.
So-called tri-folds (the fold design invented by Andrew Ritchie for the Brompton) with 16" wheels just fold and drop in square-shaped suitcases. They make several different specialized cases, but here's my Dahon Curl in an off-the-shelf Samsonite:
Uh, yeah, you'd want to pack/pad around the bike (without going overweight) before turning this over to baggage handlers.