Saddle fore/aft

about 10 minutes Lesson 4 of 6 Section 2 of 8

Why fore/aft is the next adjustment

Once your saddle is at the right height, the next decision is how far forward or backward it sits on its rails. Fore/aft controls how your hips sit relative to the bottom bracket. Do height first: it's the largest single influence on leg mechanics, and changing it also shifts the optimal fore/aft, so settling it first saves you from redoing this later.

A side view line drawing of a road bike with a red line running from the front of the saddle down to the bottom bracket, showing the fore/aft measurement, labeled "Front of Saddle to Bottom Bracket".

Wrong direction	What's happening	What you feel
Too far forward	Hips ahead of the seatpost; weight onto hands and front wheel; knees ahead of the pedals.	Pressure in wrists and hands; front-of-knee strain.
Too far back	Hips behind where they want to be; hamstrings over-recruited reaching for the pedals.	Back-of-knee tightness, lower-back strain, sliding forward on the saddle.

Saddle a touch forward. The knee already sits ahead of the pedal, and the app reads it 6.5 mm ahead.

Saddle well back. The legs reach for the pedals, and the app reads the knee 37.6 mm behind.

In between those two extremes is a window, the same fit window idea from Lesson 1: your correct fore/aft isn't a single point on the rails, it's a range your hips settle into.

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