How to Set Saddle Height: Formula, Knee Angle & Crank Length
How to set bike saddle height from your inseam (LeMond 0.883 formula), adjust it for discipline and crank length, and check it with your knee angle.
Read the guideBike fit guides
Step-by-step guides to setting up your bike: from measuring your inseam and calculating saddle height to choosing a frame size and checking your position at home. Each guide explains which advice is an established fitting principle and which depends on you and your bike.
How to Measure Your Inseam for Bike Fit
Measure your cycling inseam at home with a book and a wall: step-by-step method, common errors, and why bike inseam differs from your trouser length.
Read the guideRoad Bike Sizing: Size Chart, Stack and Reach Explained
Road bike sizing in depth: frame sizes by height and inseam, how to choose between two sizes, and how to compare stack and reach across brands.
Read the guideKnee Angle in Bike Fitting: Recommended Range and How to Measure
Recommended knee flexion at the bottom of the pedal stroke: 25–35° static or 30–40° while pedalling, why the ranges differ, and how to measure yours.
Read the guideHow to Set Saddle Fore-Aft Position
How saddle fore-aft position (setback) affects balance, reach and saddle height, why the KOPS plumb-line rule is disputed, and how to adjust it.
Read the guideRoad Bike vs. Mountain Bike Fit: Key Differences
How road and mountain bike fit differ in saddle height, torso angle, handlebar width and frame sizing — and which principles stay the same on both bikes.
Read the guideCommon Bike Fit Mistakes and How to Fix Them
Eight common bike fit mistakes — saddle too high or low, wrong frame size, copying pro handlebar drop — with how to spot each one and fix it safely.
Read the guideHow to Check Your Cycling Position at Home
Check your bike position at home with a phone: camera setup, crank position, which angles to look at, and how to read the results without over-correcting.
Read the guideTT and Triathlon Bike Fit: How to Set Up an Aero Position
Starting numbers for a TT or triathlon position: saddle height, Empfield’s seat angle and cockpit formulas, and target torso, shoulder and elbow angles.
Read the guideCrank Length and Saddle Height: How to Adjust When You Change Cranks
How crank length relates to saddle height, how FitInspector adjusts for it against a 170 mm reference, and what research says about shorter cranks.
Read the guideMTB and Gravel Bike Sizing: Size Charts, Wheel Size, Stack and Reach
MTB and gravel sizing in depth: frame sizes by height and inseam, wheel size, choosing between two sizes, and comparing stack and reach.
Read the guideCleat Position: How to Set Up Your Cycling Cleats
Where to put cycling cleats: fore-aft position, rotation and stance width, what studies show, and why to re-check your knee angle after moving them.
Read the guide
Put it into practice
- Bike fit calculator — saddle height, handlebar width and frame size from your measurements
- Check your riding position — knee and torso angles from a photo or video
- Bike size guide — size charts for road, gravel, MTB, hybrid and kids’ bikes
- FitInspector for bike shops — add these tools to your online store