The Tern Link D8 or D7i will roll while folded and has 20” wheels and folds very fast and has a rear rack. However the chainring is on the outside of the fold it seems so it seems you’re not careful you can tattoo yourself or others with an oily chainring mark while rolling or storing it. You might not like the frame hinge set up and it appears they had some kind of issue and recall with it 6 years ago.