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Rider Height
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standard / default rider 183 cm

Triumph Thunderbird Sport 900 vs Yamaha XJ600 Seca II ergonomics

Triumph Thunderbird Sport 900 and Yamaha XJ600 Seca II 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

Triumph Thunderbird Sport 900

Modeled scoreProvisional
95Comfortable

All contacts reached

Yamaha XJ600 Seca II

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 Triumph Thunderbird Sport 900 lists a 775 mm seat; the Yamaha XJ600 Seca II lists 777 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 Triumph Thunderbird Sport 900 and Yamaha XJ600 Seca II
SpecTriumph Thunderbird Sport 900Yamaha XJ600 Seca II
Seat height775 mm777 mm
Wheelbase1,550 mm1,460 mm
Wet weight-204 kg
Displacement885 cc599 cc

Posture metrics

Knee angle

Triumph Thunderbird Sport 900
Sport (58.3 deg)
Yamaha XJ600 Seca II
Sport (58.1 deg)

Hip angle

Triumph Thunderbird Sport 900
Neutral (91.8 deg)
Yamaha XJ600 Seca II
Neutral (93.7 deg)

Elbow angle

Triumph Thunderbird Sport 900
Relaxed (143.3 deg)
Yamaha XJ600 Seca II
Relaxed (143.3 deg)

Torso lean

Triumph Thunderbird Sport 900
Neutral (13.5 deg)
Yamaha XJ600 Seca II
Neutral (12.2 deg)