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Rider Height
<- Comparison guides

supermoto / default rider 183 cm

Aprilia SX 50 Supermoto vs KTM 390 SMC R ergonomics

Aprilia SX 50 Supermoto and KTM 390 SMC R land within a few ergonomic points for the default rider, so the better choice comes down to posture preference and bike category.

Fit verdict

Aprilia SX 50 Supermoto

95Comfortable

All contacts reached

KTM 390 SMC R

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 Aprilia SX 50 Supermoto has a 860 mm seat; the KTM 390 SMC R sits at 860 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 86 cm for the Aprilia SX 50 Supermoto and 86 cm for the KTM 390 SMC R.

Geometry snapshot

Geometry comparison for Aprilia SX 50 Supermoto and KTM 390 SMC R
SpecAprilia SX 50 SupermotoKTM 390 SMC R
Seat height860 mm860 mm
Wheelbase1,400 mm1,453 mm
Wet weight99 kg-
Displacement50 cc399 cc

Posture metrics

Knee angle

Aprilia SX 50 Supermoto
Sport (58.0 deg)
KTM 390 SMC R
Sport (58.1 deg)

Hip angle

Aprilia SX 50 Supermoto
Neutral (95.1 deg)
KTM 390 SMC R
Neutral (94.0 deg)

Elbow angle

Aprilia SX 50 Supermoto
Relaxed (143.3 deg)
KTM 390 SMC R
Relaxed (143.3 deg)

Torso lean

Aprilia SX 50 Supermoto
Neutral (11.3 deg)
KTM 390 SMC R
Neutral (12.0 deg)