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Rider Height
<- Comparison guides

scooter / default rider 183 cm

BMW C 650 GT vs Vespa ET4 150 ergonomics

BMW C 650 GT and Vespa ET4 150 land within a few ergonomic points for the default rider, so the better choice comes down to posture preference and bike category.

Fit verdict

BMW C 650 GT

95Comfortable

All contacts reached

Vespa ET4 150

95Comfortable

All contacts reached

The two bikes are close enough that posture preference matters more than the overall score.

Rider fit: reaching the ground

The BMW C 650 GT has a 805 mm seat; the Vespa ET4 150 sits at 805 mm, within a few millimetres of each other. As a rule of thumb you flat-foot a bike when your inseam roughly matches its seat height: about 81 cm for the BMW C 650 GT and 81 cm for the Vespa ET4 150.

Geometry snapshot

Geometry comparison for BMW C 650 GT and Vespa ET4 150
SpecBMW C 650 GTVespa ET4 150
Seat height805 mm805 mm
Wheelbase1,591 mm1,280 mm
Wet weight261 kg-
Displacement647 cc150 cc

Posture metrics

Knee angle

BMW C 650 GT
Sport (58.4 deg)
Vespa ET4 150
Sport (57.7 deg)

Hip angle

BMW C 650 GT
Neutral (91.0 deg)
Vespa ET4 150
Neutral (97.7 deg)

Elbow angle

BMW C 650 GT
Relaxed (143.3 deg)
Vespa ET4 150
Relaxed (143.3 deg)

Torso lean

BMW C 650 GT
Neutral (14.0 deg)
Vespa ET4 150
Neutral (9.5 deg)