Bike Seat Height — Learn How to Adjust It Correctly
Riding a bicycle with the saddle height set incorrectly is not just an inconvenience, it’s dangerous, inefficient, and unhealthy. If you’re new to cycling and just bought your first bicycle, it’s important to get the saddle set to the correct height.
Most bicycles come with an easy-to-adjust seat post including measurement markings so you can see how high the seat is. However, if you don’t know how high should the bike seat be, you’ll need to measure a few things and adjust the seat accordingly.
Why Does Bike Seat Height Matter so Much?
The height of your saddle directly affects how your legs operate the pedals, so if it’s too low you have to pedal harder and use unnecessary energy, which will negatively affect your cycling performance.
If it’s too high, you’ll struggle to keep your feet in place which could result in an accident. Over a long period of time, a saddle set at the incorrect height could cause damage to your joints and lead to knee pain or lower back pain.
Seat height can also differ depending on the cycling discipline, with road bike seat height usually set higher than mountain bike seat height for better aerodynamics.
Some mountain bikes also come with dropper seat posts so you can change the height depending on whether you’re cycling uphill or downhill.
Signs Your Bike Saddle Height May Be Wrong
The most common cause of incorrect saddle height is a pain in the knees. Cyclists who ride for long periods of time with a saddle that’s set incorrectly almost always end up with pain somewhere in their knees.
- If the saddle is too low, you’ll feel pain in the front of your knee.
- If the saddle is set too high, you will feel pain behind your knee.
In addition to knee pain, you could feel pain in your hips from rocking too much on the pedals, ankle pain from over-extending, and back or wrist pain from leaning forward too far. The saddle height determines your entire body position on the bicycle, so it’s vital that you set it correctly.
Before Adjusting Your Bike Seat Height
Although your saddle height is the most important setting, there are a few other things to check and adjust before setting the height, including sit-bones, fore-aft position, and tilt.
Sit-bones: Firstly, you should make sure the saddle that you have fits your anatomy and supports your sit-bones correctly. These are the two bones at the bottom of your bum that connect directly with the saddle and take most of your weight. If your saddle doesn’t support and cushion these bones well, you’ll quickly get sore and uncomfortable. This helpful guide will show where should sit bones be on the saddle.
Fore-aft: This defines how far forward or backward the saddle is on the seat post. You can adjust it by loosening the nut on the rails underneath the saddle. With your foot flat on the pedal as the crank sits horizontally, the front of your knee should be in line with the center of the pedal. To get this setting perfect, hang a plumb line from just below your kneecap to the spindle in the center of the pedal. With the fore-aft position set correctly, you should be able to balance easily while pedaling and not holding the handlebars.
Saddle tilt: This defines the angle of the saddle, which should be perfectly horizontal without leaning too far back or forward. It’s usually adjusted using a bolt underneath the saddle and a level tool to get the measurement right. Some riders prefer having their saddle tilted slightly forward, but you’ll have to decide this for yourself.
Clothing and shoes
When setting your bike saddle measurements, it’s best to wear the same clothes and shoes that you would typically wear on a ride. You’ll get a better feel for what position feels best in your riding gear. This is particularly important if you use clipless pedals, as it will affect the measurements significantly.
Three Methods to Find the Correct Bike Seat Height
There are a few different ways to measure how high the saddle on your bicycle should be. Follow these tips or use a bike seat height calculator to figure out your correct settings.
The heel to pedal method is the simplest and most common way of measuring your saddle height. It works on the logic that pedal efficiency is best when your leg is almost perfectly straight on the bottom of a stroke.
- Step 1: Sit on the bike and place your heel on one pedal
- Step 2: Rotate the pedal to its lowest possible position (6 o’clock)
- Step 3: Ensure your leg is straight and your heel is on the pedal center.
- Step 3: If your leg is not straight or your heel doesn’t reach, adjust the saddle height accordingly.
The LeMond method is a more precise way of calculating saddle height, developed by legendary US racer Greg LeMond in the 1980s. It requires a few basic tools to measure, including a large book or similar object, a tape measure, a pencil, and a wall or any other flat, vertical surface.
- Step 1: Place a book between your legs right up to your inseam and stand against the wall.
- Step 2: Make a pencil mark on the wall at the top of the book and get your inseam height by measuring this mark from the floor.
- Step 3: Multiply your inseam height by exactly 0.883 and you should get the exact distance that the top of the saddle should be from the bottom bracket.
While the LeMond method works for the majority of body types, it doesn’t take into account legs that are comparatively longer or shorter than average.
Determining Proper Saddle Height with an App
There are smartphone apps available to help you determine your proper bike seat height but whether or not they are worth the money is debatable. Bike Fast Fit Elite is one such app, available on the App Store for $9.99 (not affiliated).
The app has good reviews and provides tools for determining your saddle height but it doesn’t offer anything that can’t be done with a free protractor or angle meter app. Of course, there are several other useful cycling features included in the app so if you are purchasing it anyway, the saddle height function is a nice bonus that works well.
How Does Crank Length Affect Bike Saddle Fit?
The crank arm is the piece of steel, carbon, or aluminum that connects your pedal to your bottom bracket. These come in various lengths depending on the riding style and bicycle size, with mountain bikes generally having longer cranks than road bikes.
Most people pay little attention to crank length and often say they can’t tell the difference from bike to bike. However, crank length does play a significant role in saddle fit and affects your knee extension, hip angles, and ankle angles.
For people of an average height between 175cm and 185cm, the industry-standard crank length supplied on most bicycles will be adequate. However, if you are significantly taller or shorter than average, you may want to consider getting cranks specially fitted to your needs.
If your cranks are too long, even a single millimeter change in saddle height will be noticeable, so it’s important to get this right. Over long periods of time, incorrect crank lengths can put a strain on your joints and cause injury.
Bonus: How to Make a Bike Seat More Comfortable?
Saddle sores are a common complaint amongst cyclists, with many people recommending fancy padded shorts, skin creams, or gel saddles. However, the most common cause of saddle soreness is either a cheap saddle or a badly fitted saddle.
Industry-standard saddles that come with cheap bicycles are usually no good for long-distance rides, such as completing a century and should be replaced as soon as possible.
However, even a top-of-the-range saddle won’t be comfortable if it isn’t fitted correctly. Here are some tips to ensure you don’t end up with the dreaded saddle sores:
- Some initial soreness is inevitable – in the first few weeks of riding a bicycle, it will take some time for your sit bones to adjust to the pressure, so don’t give up immediately.
- If soreness continues after a few weeks, test a few saddles at your local bike store until you find one that fits your sit bones.
- Get a professional bike fitter to set your saddle perfectly to your anatomy, with the correct fore-aft position, level, and height.
- With a good quality, correctly fitted saddle you shouldn’t need padded cycling shorts for short or moderately long rides. In fact, for many people, padded shorts make it worse.