It’s zippy, agile and fun. It’s compact enough to put on bus rack, substantial enough to carry a kid and it grows with you as your needs change.

The RFA is one bike frame that can be configured into one of two wheelbase modes thanks to the DynamicDrops which allow two possible rear wheel positions. In Utility (standard- longer wheelbase) mode, the bike will accommodate a longer rear rack and thus is able to carry more cargo. When you no longer regularly carry two kids, you can convert the bike to Sport mode with an additional rack. The smaller footprint and impressive weight capacity means it rides like a “normal” bike, but is fully capable of carrying a larger kid, or even an adult. And the Shimano Steps motor flattens hills and makes the miles fly by.

• Carry one passenger in Sport mode, or two kids in Utility mode.

• 4130 chromoly frame is built to last. Thru axle increases front end rigidity.

• Fits easily on most automobile and bus bike racks or in bike spaces on light-rail cars.

• The RFA comes with 24-inch wheels for a lower stand-over height and lower center of gravity, which is more stable when hauling kids or cargo.

• The RFA frame (all Xtracycle frames actually) comes in one size and will fit most riders by swapping stems and seatposts.

• Accepts an optional frame-mounted Porter Rack, which then can carry a roomy Porter Pack if you like, for easy access of small or medium-sized items.

• Add a Kid Kit (Hooptie and Magic carpet) to the Utility for $265, or a Passenger Kit (Snack Bars and Magic Carpet) for $164