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Rider Height
<- Comparison guides

cafe-racer / default rider 183 cm

BMW R100S vs Kawasaki Z900RS Cafe ergonomics

BMW R100S and Kawasaki Z900RS Cafe 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

BMW R100S

Modeled scoreProvisional
95Comfortable

All contacts reached

Kawasaki Z900RS Cafe

Modeled scoreProvisional
95Comfortable

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 BMW R100S lists a 820 mm seat; the Kawasaki Z900RS Cafe lists 820 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 BMW R100S and Kawasaki Z900RS Cafe
SpecBMW R100SKawasaki Z900RS Cafe
Seat height820 mm820 mm
Wheelbase1,466 mm1,471 mm
Wet weight220 kg216 kg
Displacement980 cc948 cc

Posture metrics

Knee angle

BMW R100S
Sport (58.1 deg)
Kawasaki Z900RS Cafe
Sport (58.1 deg)

Hip angle

BMW R100S
Neutral (93.6 deg)
Kawasaki Z900RS Cafe
Neutral (93.6 deg)

Elbow angle

BMW R100S
Relaxed (143.3 deg)
Kawasaki Z900RS Cafe
Relaxed (143.3 deg)

Torso lean

BMW R100S
Neutral (12.3 deg)
Kawasaki Z900RS Cafe
Neutral (12.3 deg)