Why bike fit matters, and what "right" actually means
Three reasons bike fit matters
| Reason | What it is | What goes wrong outside the window |
|---|---|---|
| Pain | Cycling's non-crash injuries are almost all overuse injuries. | Aching knees, locked-up necks, hand numbness. All of them trace back to a position your body is held in for hours. Fix the position and the symptom usually goes away. |
| Efficiency | Pedaling well means your legs produce power through their full range without overextending or under-engaging. | A saddle too low overworks your quads. A saddle too high overworks your hamstrings and calves, and bounces your hips at the bottom of each stroke. Either way, you're paying a watts tax. |
| Comfort | Cycling is mostly hours of steady-state effort. Time amplifies anything wrong with your position. | A position that's fine for 30 minutes can be unbearable at hour three. Fit for the long ride; short ones take care of themselves. |
Quick check: which of the three are you most affected by right now? Most riders pick one that's loudest. The same fit-window thinking applies to all three.
Which of these is closer to how bike fit works?
Explain this
Two riders with the same inseam can have different correct heights because foot angle and flexibility shift the target. That is why a single formula is only a starting point, not the answer.