1. Why Fit Matters

Proper fit improves power output, reduces injury risk, and makes long rides enjoyable. Even small adjustments to saddle height or fore/aft position can change muscle activation and comfort.

2. Stack & Reach — geometry basics

Stack (vertical) and reach (horizontal) are the neutral language across brands. Use these numbers—rather than generic size charts—to compare how aggressive or upright a frame will feel.

3. Setting Saddle Height

Set saddle height so your knee has a slight bend (~25–35°) at the bottom of the stroke. Use small incremental changes and test-ride to lock in comfort and power.

4. Fore/Aft & Knee Position

Fore/aft saddle position adjusts knee-over-pedal-spindle alignment—affecting both power and joint safety. Video or plumb-line checks during a fit are valuable here.

5. Handlebars & Reach

Handlebar reach and drop tune control and aerodynamics. Endurance setups favor shorter reach and smaller drop; racers prefer more extension and lower positions only if sustainable.

6. Cleats & Pedal Setup

Position cleats so the ball of the foot sits over the pedal spindle; adjust float and lateral position for natural knee tracking. Consider offset cleats if your anatomy requires it.

7. When to Book a Pro Fit

See a pro if you have persistent discomfort, are switching bike types, or aiming for race performance. A pro uses measurements, video, and power data to dial the setup precisely.

Fit Summary

• Compare stack & reach across frames.
• Adjust saddle & pedals first, then bars.
• Test changes over multiple rides before locking them in.