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Rider Height
<- Comparison guides

standard / default rider 183 cm

BMW K 100 vs BMW R90/6 ergonomics

BMW K 100 and BMW R90/6 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 K 100

95Comfortable

All contacts reached

BMW R90/6

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 K 100 has a 810 mm seat; the BMW R90/6 sits at 810 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 K 100 and 81 cm for the BMW R90/6.

Geometry snapshot

Geometry comparison for BMW K 100 and BMW R90/6
SpecBMW K 100BMW R90/6
Seat height810 mm810 mm
Wheelbase1,516 mm1,465 mm
Wet weight-209 kg
Displacement987 cc898 cc

Posture metrics

Knee angle

BMW K 100
Sport (58.2 deg)
BMW R90/6
Sport (58.1 deg)

Hip angle

BMW K 100
Neutral (92.5 deg)
BMW R90/6
Neutral (95.4 deg)

Elbow angle

BMW K 100
Relaxed (143.3 deg)
BMW R90/6
Relaxed (143.3 deg)

Torso lean

BMW K 100
Neutral (13.0 deg)
BMW R90/6
Neutral (10.6 deg)