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standard / default rider 183 cm

Triumph Bonneville T100 vs Triumph Speed 400 ergonomics

Triumph Bonneville T100 and Triumph Speed 400 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.

Posture overlay

The default rider's modeled seated posture on each bike, solved from the same geometry as the score panels and overlaid on one ground line so seat height and reach differences are visible at a glance.

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Modeled fit comparison

Triumph Bonneville T100

Modeled scoreProvisional
95Comfortable

All contacts reached

Triumph Speed 400

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 Bonneville T100 lists a 790 mm seat; the Triumph Speed 400 lists 790 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 Bonneville T100 and Triumph Speed 400
SpecTriumph Bonneville T100Triumph Speed 400
Seat height790 mm790 mm
Wheelbase1,450 mm1,377 mm
Wet weight228 kg170 kg
Displacement900 cc398 cc

Posture metrics

Knee angle

Triumph Bonneville T100
Sport (58.1 deg)
Triumph Speed 400
Sport (57.9 deg)

Hip angle

Triumph Bonneville T100
Neutral (94.0 deg)
Triumph Speed 400
Neutral (95.7 deg)

Elbow angle

Triumph Bonneville T100
Relaxed (143.3 deg)
Triumph Speed 400
Relaxed (143.3 deg)

Torso lean

Triumph Bonneville T100
Neutral (12.0 deg)
Triumph Speed 400
Neutral (11.0 deg)

Fit by rider height

Modeled ground contact by rider height, in 5 bands from 5'2" to 6'4" (158-193 cm).

Modeled foot contact for Triumph Bonneville T100 and Triumph Speed 400 by rider height
Rider heightTriumph Bonneville T100Triumph Speed 400
158 cm / 5'2"Balls of feetBalls of feet
167 cm / 5'6"Balls of feetBalls of feet
176 cm / 5'9"Both feet flatBoth feet flat
184 cm / 6'0"Both feet flatBoth feet flat
193 cm / 6'4"Both feet flatBoth feet flat

Modeled from each bike's seat height and a typical inseam-to-height ratio only — not a flat-footing guarantee. Real ground contact still depends on seat shape, suspension sag, footwear, and your own proportions. Confirm on the motorcycle.

Verdict

Triumph Bonneville T100 and Triumph Speed 400 are both standard bikes, so the practical question is which of their real differences you'd actually feel. Triumph Speed 400 is about 58 kg lighter wet than Triumph Bonneville T100, which tends to show up most when paddling backward out of a parking spot or picking the bike up off the sidestand. Triumph Bonneville T100 runs a 73 mm longer wheelbase than Triumph Speed 400, which typically trades some low-speed agility for extra stability at speed. None of that adds up to a clear overall winner in the modeled posture score, so the individual differences above are the more useful comparison than the headline number. Treat every figure here as a planning estimate: seat width, suspension sag, footwear, and your own proportions can shift the real feel more than a few millimetres or degrees on paper. Load your height and inseam into the simulator, then sit on both before you decide.

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