How To Measure Bike Stem? – A Very Step By Step Guide

How To Measure Bike Stem

The stem is the component of a bike which adds the handlebars with the steerer pipe of the bicycle fork. Sometimes it is also known as a goose neckline, a stem’s design belongs to a quill or threadless system. Every system is compatible with related headsets as well as fork design.

Bike Stem 

A bike has a lot of functions in people’s lives. Initially, a style of individual transport, a bike is getting a recreational vehicle for a lot of men and women. Since its creation in the 19th century, a bike is now a frequent mode of transport all around the world. Right now an estimated 1 billion people globally own a bike.

People using a bike for utility, diversion, or racing must be familiar with its construction and parts. One significant part a bike is your stem. The stem is vital since it joins the handlebar, which can be directly obtained by the biker’s palms, to the bike fork which controls the motion of the front wheel.

Essentially, bicycle stem riser allows the rider to control the path of this bike. Knowing the various forms of bicycle stems and which is suitable for the different kind of bike is essential. This is the way rider can smoothly maintain the bycicle direction.

Types of Bike Stems

To be particular, a bicycle stem is a L-bent part of a bicycle that connects the handlebars into the steerer tube of the bike fork. A bicycle stem can also be referred to as a gooseneck, and it’s two big forms: quill and threadless stem.

The quill stem desires a threaded headset using a span based on the bicycle version. The expression threadless stem doesn’t arise from the stem being threadless; it’s derived based on if the stem demands an un-threaded steerer tube with a length which varies based on the design of this bicycle.

Quill Stem

The quill stem existed until the threadless function, and due to that, it remains the industry standard on utility bicycles of any cost and luxury retro bikes. On the other hand, the quill stem has been substituted with the threadless stem as a market standard in a special sort of bicycle.

The quill stem works with a threaded fork which reaches up into the headset. When a quill stem is utilized, the fork steerer tube needs to have a length that doesn’t float over the headset. A quill stem could be made from aluminum or steel.

There are quite a few benefits in deciding on a quill stem. Additionally, it may be easily raised with a very long shaft. Quill stems possess a slimmer and smooth look in comparison with threadless stems.

Thread less Stem

Thread less stems would be the newer kind of stem, and they exchanged the quill stem because the business standard online sports bikes. This sort of stem clamps across the top of the fork steerer tube which protrudes over the headset.

Instead of the quill type that’s fitted in the cap of the fork steerer tube. The length of a thread less stem may fluctuate, reaching up to approximately 130 millimeters.

A thread less stem might require a star-nut or an expander plug. The expander plug comes with an edge of doing the task of a star-nut without damaging the carbon steerer.

Additionally, there are many advantages from utilizing a thread less stem. First off, it’s easier to reverse, swap, mix and match stalks every time a buyer opts for a thread less stem since it can come in many different configurations, color, match, angle, and structure variants.

A thread less stem makes it feasible to utilize a steerer tube which is lighter like carbon fiber or aluminum metal, which makes the bike generally lighter.

Mountain bike stem: in-depth

Stem length

A critical question if selecting a stem in what length it may be. Road riders like to choose stem length depends on overall bike fit and position, for off-road riders.

Moreover, the length of the stalk is critical at the time of fixing how the bike handles. Shorter stems are responsive and quicker handling which is a great advantage on gravity riding and single technical track.

For many riders, a mid-length stem of sixty to eighty mm gives the perfect stability of responsive steering as well as pedal efficient position, but the shorter stems work great with the idler frame geometry of modern track bikes or long forked hardtails instead of sheer angles of classic bikes.

You have to experiment with stalk lengths to get one which gives the right balance for you. A difference of ten mm may have an enormous effect regarding quick fire single track handling or all day pedaling comfort.

Stem rise

The stem rise indicates the stem angle in degree, added with the split steerer tube and affect the bike position and reach. A zero rise stem is normally straight while a stem with the rise of ten degrees has a ten-degree angle between handlebar fasten areas and the steerer. Most stems hold a reasonable rise and may be flipped to give a lower saloon position.

How To Measure Bike Stem

Since the stem length, you have to experiment with stem rise to get ideal positioning for a maintained pedaling handling and comforting response.

The stem rise is one way of getting ideal cockpit positioning, along with handlebar rise and some spacers on the steerer tube and so on also being alternatives. So as a rider you need to know how is stem angle measured and the significant impact of stem rise.

Road bike stem: in-depth

The most significant thing while choosing a road stem is the length of the stem, may be the key factor for overall fit of the bike. Riders like to get a long, small and aerodynamic position of the bike- e.g., spirited racers- can choose for a longer (1200 mm+) stem for optimum stretch.

Therefore for the numbers of casual riders such position is not comfortable, a shorter stem permits for more upright ride position.

Riders who have no desire to stretch on the bike will get a stem 10 mm shorter, or a rise of few degree more may result in a more upright riding position which can suit them better.

Alternatively, budding racers look for pedaling skill, and super aerodynamics can wish to add more mm to stem length or can drop the arena down few degrees. Experiments can express the right size for you. And it’s clearly understood that the road bike stem lengths is very important while riding efficiently.

BMX stems: in-depth

Bar positioning

One major thing to have in mind while selecting a new shoot is the effect of it’s on the position of the bar. If you like to understand this, you must have some ideas about the perfect position.

Since you like to ride with the higher bars for excess leverage over the back of the bike, a top load stem may aid to get a slighter higher position. When you like the lower bars and an excess forward riding position, you have to move ahead for front load stalk.


The length of your stem may power overall reach for the bike. A shorter stalk may ensure more upright position as well as sharper, more responsive handling but it may be at the cost of high-speed stability.

A longer shoot may be more steady at speed and permit more leverage over the front of the wheel of the bike, important for such jobs line nose manuals. A longer stem may be one way to obtain over the feeling of being cramped on a bike with having a shorter frame or vice versa.

How To Measure Bike Stem

How to Measure a Bike Stem?

  • The extension (mm): The real length of the stem from the center of the steering bore to the handlebar clamp. We call it stem length.
  • Reach (mm): The useful length of the stem measured from the center point of the steering bore to the center of the handlebar clamp except accounting to rise. On stems, this measurement may be made along an imaginary line.
  • Angle A: Measure from the imaginary line vertical to the steering axis to the middle of the stem extension.
  • Angle B: Measure from the middle of the real steering axis to the middle of the stem extension. This is really what we like to refer when indicating the stem angle.
  • A normal way to see the difference is the following: Angle B= Angle A+ 90 degree. Suppose if a manufacturer advertises a seven-degree angle applying angle A, we can say it as 97 degrees.
  • Rise (mm): The fruitful height obtained since a function of the stem’s length and angle. Measure vertically from the middle of the handlebar clamp to a thinking line which bisects the middle meeting point of the extension as well as a vertical portion of the stem.
  • Height (mm): The general length of the vertical segment of the stem

How do you what the correct stem length for you and your bike is? 

I will begin by indicating the best approach to obtain the answer to this question would be to organize a professional bike fit with a respectable bike shop. Most stores provide bicycle suits of different varieties from easy to sophisticate, and several provide it within the purchasing process so that you’re not billed loads of additional cash in addition to your brand new bike.

Stems come in several lengths from stubby to ultra-stretched. To put it differently, if you would like a racy, competitive and aerodynamic place, a longer stem will probably offer a more extended out riding posture. If relaxation is the top priority, a much shorter stem length may bring the pubs closer to the saddle and set you in a more vertical position, putting less strain on your spine.

However, the bike stem length has to be regarded as part of this larger picture of this frame dimensions, saddle height, saddle fore-aft modification and also the form and size of this drop handlebars. That is where a professional bicycle fit is valuable, as those other elements will be considered.

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1 thought on “How To Measure Bike Stem? – A Very Step By Step Guide”

  1. Thanks you for your detailed explanation.. Although somewhat hard to follow without illustrations pertaining to the different triangles, etc. to derive angles/values fron..

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