How Many Spacers Under Stem

There are many schools of thought when it comes to how many spacers to put under a stem. Some people believe that the more spacers, the better, while others believe that too many spacers can actually weaken the stem. So, how many spacers should you use under your stem?

The answer may depend on the type of stem you have. If you have a carbon fiber stem, you may be able to get away with fewer spacers than if you have an aluminum stem. Carbon fiber is stronger and stiffer than aluminum, so it doesn’t need as much support.

However, if you’re not sure about the strength of your stem, it’s always better to err on the side of caution and use more spacers. In general, most people recommend using at least two spacers under your stem. This will help to distribute the weight of the stem evenly and prevent the stem from slipping.

There’s no definitive answer to this question – it depends on the specific stem and bike setup. However, as a general rule of thumb, most riders will use between 2-5 spacers under their stem. This allows for a bit of adjustability in terms of height and handlebar position.

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How much spacer is under the stem?

There is no definitive answer to this question as there is no standard size for spacers. It is generally recommended to have at least 3mm of space between the stem and the frame, but some riders prefer more or less depending on their riding style and preferences. Ultimately, it is up to the rider to decide how much space to leave under the stem.

Do you need spacers below the stem?

If you’re using a threadless stem, spacers are generally not necessary. Threadless stems clamp onto the outside of the fork’s steerer tube, so the steerer tube must be the correct length to start with. Additionally, most threadless stems have an internal shim that takes up any extra space and prevents the stem from clamping too tightly and damaging the steerer tube.

However, if you’re using a quill stem, spacers are generally required. Quill stems clamp onto the inside of the fork’s steerer tube, so the steerer tube must be long enough to accommodate the stem, spacers, and any necessary headset adjustments. Additionally, quill stems require a special expander plug to keep them securely in place, and this expander plug takes up some space inside the steerer tube.

How much is too much spacers?

There are a lot of variables to consider when it comes to spacers and how much is too much. It really depends on your personal preference and the look you’re going for. If you’re unsure, it’s always best to err on the side of caution and go with a smaller spacer.

You can always add more later if you decide you want a more dramatic look. Generally speaking, most people tend to use between 2-4mm spacers. Anything beyond that is usually considered to be too much.

Of course, there are always exceptions to the rule and some people do use larger spacers successfully. It’s really all about finding what works best for you and your individual style. If you’re worried about your spacers being too big or making your tires look funny, try to find a brand that offers a variety of sizes.

This way you can experiment until you find the perfect amount of space for your needs.

Can I add spacers to my stem?

There are a few things to consider when wondering if you can add spacers to your stem. The first is the diameter of your steerer tube. If your steerer tube is 1-1/8″ in diameter, then you can NOT add spacers to your stem.

The second thing to consider is the length of your stem. Standard stem length is 40-60mm. If your stem is longer than 60mm, then you can NOT add spacers to your stem.

The third and final thing to consider is the height of your headtube. If your headtube is less than 40mm, then you can NOT add spacers to your stem. In conclusion, whether or not you can add spacers to your stem depends on the diameter of your steerer tube, the length of your stem, and the height of your headtube.

how many spacers under stem


Maximum headset spacer stack height

When it comes to mountain bike suspension, one of the key performance indicators is the maximum headset spacer stack height. This is the maximum height that your suspension can be adjusted to, and it’s an important factor in how your bike will perform on the trail. The main reason why maximum headset spacer stack height is so important is because it determines how much travel your suspension will have.

Travel is the distance that your suspension can compress or extend, and it’s a key factor in how your bike handles bumps and obstacles on the trail. Generally speaking, the more travel your suspension has, the better it will be at absorbing big hits. However, there are trade-offs to consider.

More travel can mean that your bike is less agile and more difficult to control, so it’s important to find the right balance for your riding style. Maximum headset spacer stack height is also important because it affects the geometry of your bike.


If you’re wondering how many spacers to put under your stem, the answer is not as simple as you might think. Depending on the size of your bike, the type of terrain you’re riding on, and your own personal preference, the number of spacers you need can vary. That said, a good rule of thumb is to start with two spacers and go from there.

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