Back pain from cycling: it's almost always the cockpit (here's how to fix it)

Lower-back pain in cyclists is almost never a 'weak spine' — it's geometry. When the reach to the bars exceeds what your flexibility can deliver, the lumbar spine rounds to compensate and spends the whole ride under tension. The neck pays the bill at the other end, extending to see the road.

The right torso angle depends on you

There is no single correct angle: the ideal torso crosses bike type, goal and flexibility. A performance road setup with a flexible rider works far more aggressively; a comfort city position wants a much more upright torso. That's why FitRide asks about goal and flexibility before recommending — and measures your actual angle on camera, while pedalling.

• Torso lower than your flexibility allows → lumbar rounds → lower-back pain.
• Bars too low → cervical extension → neck pain and numb hands.
• Torso too upright on a sporty bike → weight concentrated on the saddle → sit-bone discomfort.

Adjust in the right order

1. Confirm saddle height and setback first — the cockpit is always adjusted last.
2. Reach too long: shorter stem (they step in 10 mm increments; 10–20 mm shorter changes a lot).
3. Bars too low: raise spacers on the steerer (5–10 mm at a time).
4. Our engine's rule of thumb: ~1 cm of cockpit change moves the torso angle by about 1 degree.

What isn't the bike

A weak core, long desk hours and sudden training-volume jumps also show up as lower-back pain. The fit removes the mechanical cause; core work and gradual volume do the rest.