A correct bike seat height makes a rider able to produce more power and become more comfortable, unlike an improper setting. It is easy to find the correct saddle height to use on any mountain bike. A mountain bike saddle height that is not properly set can cause joint pain, sore muscles, and saddle sores. Low seat heights lead to overworked joints and burning quads on the climbs. On the other hand, a raised saddle helps the rider to get more extension of leg muscles, and their knees are not forced to bend sharply.
But raising a saddle up too high can pull the hamstring muscles, hyperextend the tendons, Achilles and other problems to the feet. The other problem is that the rider’s center of gravity rises off the ground and affects their handling and cornering.
Seat height plays a significant role in power transfer on the bike. Riders produce an optimal amount of leverage with every pedal stroke when the saddle height is right. This helps them to avoid muscle fatigue. There are several ways through which a rider can easily get the right saddle height for their mountain bike. The methods outlined will help a rider to find a starting point. Adjusting your saddle height based on feel is necessary.
- Start at the Hips – The quickest way to find the right saddle height is to stand next to your bike and set the saddle with the top of your hip bone. Since biking shoes will affect the distance from the saddle to the pedal, you can wear them as you get the measurements. This method is not foolproof, but it's a starting point, and the exact seat height can be determined and have the measurement transferred to any mountain bike regardless of the bottom bracket height. Riders who are used to riding with a low saddle may be uneasy with hip height, but they can give it a try and drop the height a little if they feel uncomfortable.
- Measure Your Inseam – You can multiply your inseam measurement by 0.883 to get an approximate saddle height (the distance from the bottom bracket center to the top of the saddle). It may be a rough estimate for the saddle height, but the precision of the results implies that the method is very precise. All the same, it's just a starting point that is based on averages.
- Keeping in mind the estimated saddle height measurements, you can use a tape to measure the distance between the bike bottom bracket’s center and the top of the saddle above the seat post then go for a test ride. If you notice signs of hyperextension or joint and muscle fatigue, you can adjust.
- Minimum Seat-post Insertion – When you are setting the seat height, make sure there’s minimum seat post insertion into the bike frame. Most of the seat posts are marked with a minimum insertion line at the bottom of the post. To avoid damage to the bike frame, the seat post will be inserted 3-4 inches, letting the post extend below the joint where the seat tube and top tube join. It is better to purchase a longer seat post to avoid causing damage to the bike and set a proper seat height.
- Holmes method – To find your appropriate seat height with this method, you need a goniometer which will measure the angle of your knee joint at the base of a pedal rotation. The angle recommended is between 250 to 350. Research has confirmed that finding your seat height using this method has better results than the other methods.
- Heel method - This the most basic method that every bicycle shop retailer and trainer knows. You place your seat parallel to the ground and get on your mountain bike. With someone supporting you, place one foot on a pedal and ensure that your heel is on the pedal axle. With this position, your pedal is at its lowest point and your leg totally straight. You place your foot on the pedal as if you are biking, and your leg will be a bit bent. This method is commonly used in finding the ideal mountain bike seat height.
- A Note on Dropper Posts – A dropper post offers a rider multiple seat heights that they can choose from depending on the circumstances. When you set a seat height with a dropper post, make sure to set the height according to the fully extended length of the post. Keeping a consistent seat height from one ride to another makes the mountain biker more confident and stronger over the long term.
Having an improper bike seat height set up is uncomfortable and can cause injuries. The most common injuries from a bad seat height are saddle sores and knee pain. You really want to avoid the two. Knee pain is caused by a seat that is too high or too low. Too high seats result in over extension of the knee, and very low seats force you to exert more pressure on the knees whenever you pedal. Saddle sores result in fully extended legs at the lowest point in the pedal rotation. Your legs will be locked out when pedaling and make your hips rock from side to side. The hip movement causes chafing, scrapes and other wounds on your butt.