Honda CB400 Super Four vs Honda Grom ergonomics

Rider fit: reaching the ground

The Honda CB400 Super Four lists a 755 mm seat; the Honda Grom lists 761 mm — a 6 mm difference. Seat height is only a first-pass ground-reach input. It does not establish safety or actual foot contact. Seat width, suspension sag, boots, mobility, load, and individual proportions can materially change the result.

On seat height alone, the Honda CB400 Super Four has the easier modeled ground reach. Load your measurements into the simulator to compare the model, then verify both motorcycles in person.

Verdict

Honda CB400 Super Four and Honda Grom are both standard bikes, so the practical question is which of their real differences you'd actually feel. Honda Grom is about 95 kg lighter wet than Honda CB400 Super Four, which tends to show up most when paddling backward out of a parking spot or picking the bike up off the sidestand. Honda CB400 Super Four runs a 210 mm longer wheelbase than Honda Grom, which typically trades some low-speed agility for extra stability at speed. None of that adds up to a clear overall winner in the modeled posture score, so the individual differences above are the more useful comparison than the headline number. Treat every figure here as a planning estimate: seat width, suspension sag, footwear, and your own proportions can shift the real feel more than a few millimetres or degrees on paper. Load your height and inseam into the simulator, then sit on both before you decide.