How hard are these tricycles to assemble?

Assembly experience varies. Convertible and stroller-style trikes draw the most complaints, with r/Parenting commenters noting Radio Flyer's multi-config models are harder to put together but feel sturdier afterward. The Radio Flyer Red Rider and lightweight pedal trikes like the SEREED are described as quicker to set up, with the Red Rider's folding variant arriving largely assembled.