I rode a Greenspeed trike for quite a few years and loved it ... on smooth roads. Tadpole trikes are much more stable for cornering than delta, but they are like getting in and out of a low to the ground race car. Presuming more sedate riding (not cornering at speed etc.), a delta trike is much easier on/off. I'd recommend talking with Angletech. https://cycledifferent.com/ to learn what the best options are.
As an alternative, how would your dad do walking more? Are those barriers easier to address than trike barriers? With abandon, Patrick -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To unsubscribe from this group and stop receiving emails from it, send an email to rbw-owners-bunch+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/rbw-owners-bunch/22e22dfd-880b-46c2-88ea-8f32bdc0ebe9%40googlegroups.com.