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cruiser / default rider 183 cm

Harley-Davidson Nightster Special vs Kawasaki Vulcan 900 Custom ergonomics

Harley-Davidson Nightster Special and Kawasaki Vulcan 900 Custom have modeled posture scores within three points for the 183 cm default rider. Treat this as a planning estimate; posture preference, data confidence, and a real test sit still matter.

Modeled fit comparison

Harley-Davidson Nightster Special

Modeled scoreProvisional
92Comfortable

All contacts reached

Kawasaki Vulcan 900 Custom

Modeled scoreProvisional
92Comfortable

All contacts reached

The modeled scores are within three points, so the result does not distinguish a higher-scoring bike. Treat the result as a planning estimate and compare each bike's geometry confidence before a real test sit.

Rider fit: reaching the ground

The Harley-Davidson Nightster Special lists a 688 mm seat; the Kawasaki Vulcan 900 Custom lists 686 mm, within a few millimetres of each other. 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.

Geometry snapshot

Geometry comparison for Harley-Davidson Nightster Special and Kawasaki Vulcan 900 Custom
SpecHarley-Davidson Nightster SpecialKawasaki Vulcan 900 Custom
Seat height688 mm686 mm
Wheelbase1,545 mm1,646 mm
Wet weight219 kg277 kg
Displacement975 cc903 cc

Posture metrics

Knee angle

Harley-Davidson Nightster Special
Open (111.8 deg)
Kawasaki Vulcan 900 Custom
Open (120.6 deg)

Hip angle

Harley-Davidson Nightster Special
Sport (78.7 deg)
Kawasaki Vulcan 900 Custom
Sport (80.0 deg)

Elbow angle

Harley-Davidson Nightster Special
Relaxed (143.3 deg)
Kawasaki Vulcan 900 Custom
Relaxed (143.3 deg)

Torso lean

Harley-Davidson Nightster Special
Neutral (8.6 deg)
Kawasaki Vulcan 900 Custom
Neutral (10.2 deg)