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Rider Height
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cruiser / default rider 183 cm

QJ Motor SRV 550 vs Zontes 310 V ergonomics

QJ Motor SRV 550 and Zontes 310 V land within a few ergonomic points for the default rider, so the better choice comes down to posture preference and bike category.

Fit verdict

QJ Motor SRV 550

95Comfortable

All contacts reached

Zontes 310 V

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 QJ Motor SRV 550 has a 785 mm seat; the Zontes 310 V sits at 807 mm — a 22 mm difference. As a rule of thumb you flat-foot a bike when your inseam roughly matches its seat height: about 79 cm for the QJ Motor SRV 550 and 81 cm for the Zontes 310 V.

That makes the QJ Motor SRV 550 the easier reach to the ground — the safer pick for shorter riders or anyone who wants both feet planted at a stop — while the Zontes 310 V gives taller riders more legroom and a more open knee bend. Load your own height and inseam into the simulator to see exactly how each one fits you.

Geometry snapshot

Geometry comparison for QJ Motor SRV 550 and Zontes 310 V
SpecQJ Motor SRV 550Zontes 310 V
Seat height785 mm807 mm
Wheelbase1,440 mm1,390 mm
Wet weight206 kg159 kg
Displacement554 cc312 cc

Posture metrics

Knee angle

QJ Motor SRV 550
Neutral (103.8 deg)
Zontes 310 V
Neutral (100.3 deg)

Hip angle

QJ Motor SRV 550
Sport (78.2 deg)
Zontes 310 V
Sport (78.2 deg)

Elbow angle

QJ Motor SRV 550
Relaxed (143.3 deg)
Zontes 310 V
Relaxed (143.3 deg)

Torso lean

QJ Motor SRV 550
Neutral (6.9 deg)
Zontes 310 V
Neutral (6.0 deg)