Are All Bike Stems The Same Size?

by | Last updated on January 24, 2024

, , , ,

Generally speaking,

stem lengths on road bikes vary from 80 to 140mm, with 100mm and 110mm the most common sizes

. There are shorter and longer stems available if you’re short or very tall and ride a frame size at the extreme end of the size range.

Are bike stems universal?


Yes, bike stems are universal

. Where they connect to the handlebars is almost always the same width. Where it connects to the fork steering rod is the same width. So there is around a 95% chance that a bike stem will fit your bike.

How do I know my bike stem size?

Length or reach is the horizontal measurement of your bike stem. It is

measured from the center of your steer tube to the center of your handlebar clamp along the central axis of your stem

. Stem length typically ranges from 60mm to 150mm with some outliers in the extremes.

How do I know what size stem I need?

Is 110mm stem too long?

In my experience, a stem length of 90-110 on that size frame is not unusual and could be a well sized stem for the bike and rider as long as all the other fit elements are correct.

Do all handlebars fit all stems?


Stems are available to fit a range of steerer tube sizes with 1 1/8” being by far the most common

(a shim can be use to make these fit older bikes with 1” steerers) A range of clamp sizes is available to fit the different handlebar diameters – 26/25.8mm are the traditional standard road sizes, but in recent years these …

Do I need a shorter stem?

Put simply, if you want a racy, aggressive and aerodynamic position, a longer stem will provide a more stretched out riding position.

If comfort is your top priority, a shorter stem length will bring the bars closer to the saddle and put you in a more upright position, placing less strain on your back

.

Is 70mm stem too short for road bike?

It’s a bit of a cliché that a too-short stem will over-quicken the handling. It’s only true to a point,’ says Phil Cavell, director of Cyclefit in London. ‘Needing a 70mm-80mm stem probably means bike sizing needs to be reviewed, but

many riders are happy to ride a 70 or 80 or 90mm stem without difficulty

.

How do you replace a bike stem?

Is 40mm stem too short?

Short Stems


A shorter stem (< 40mm) will bring your handlebars closer to your fork

. This will keep your weight behind or even with the front wheel. These stems put you in a neutral position and make it easier to go downhill. Shorter stems are ideal for trail riding, aggressive enduro riding, and downhill riding.

What is bike stem length?

The length of a stem is one of the most important factors to consider if you are looking to change the stock option on your bike.

Mountain bike stems are typically around 50-80mm long, while road bike stems are longer, starting at around 80mm and extending to 120mm or longer as the frame size increases

.

Is 60mm stem too short for road bike?

To put a (rough) number to it, a long stem is 100-120mm, very long stems are 130mm or more, and

anything less than 90mm can be considered a short stem

.

How do I know if my stem is too short?

Look down at your bars and see where they line up in relation to your front hub. If the stem is too long the bars will be too far forward and the hub will be aligned behind the bars. If the stem is too short

the hub will be aligned in front of the bars

.

How does a shorter stem affect bike handling?

The shorter stem definitely

gives the bike a more responsive feel on the trail

, and is well suited to aggressive riding. When jumping the bike or hitting drops, a shorter stem puts you in a better position to confidently hit these sort of features (that often have painful consequences if we don’t ride them well).

What does a shorter stem do?

Using a shorter stem

gives the bike quicker handling characteristics and a more responsive feel

. A longer stem shifts your body weight towards the front of the bike and puts you in a better pedaling position, especially on those steep climbs.

Do I need a spacer under my stem?


There is no reason to have any problem due to no spacers under the stem

. I rode two different bikes that way over four seasons. You see pictures of pro bikes setup that way all the time. It is wise, but not absolutely necessary to have a 2.5-5mm spacer on top of the stem.

How do I choose the right mountain bike stem length?

You will find it hard to ‘work’ the terrain and you’ll be generally unbalanced from being so upright. On most modern mountain bikes you should be aiming for a stem length somewhere

between 50mm and 80mm

. Long stems are more stable when climbing using narrow handlebars. That’s it.

Is it better to get a bigger or smaller bike frame?


If your arm span is longer than your height, go for a bigger frame

. If it’s shorter, get the smaller one. On a bigger bike, the reach to the handlebars will be longer. If you have proportionally longer arms, you are likely to feel more comfortable on a bigger frame.

What is the shortest stem for a road bike?

As a rule of thumb, on a road bike you shouldn’t run a stem much shorter than

90mm

or much longer than 130mm. If you need a stem length beyond those extremes, your bike frame is the wrong size.

What is the shortest bike stem?


Hope 35mm

. Hope has now joined a few other manufacturers who are producing stems in this ultra short 35mm length. Aside from Mondraker’s forward geometry stems and a few direct-mount options for dual crown forks, these are the shortest stems around.

Does lowering stem increase reach?

Registered. No, dropping the bars does not effect the position of your seat. Your seat should be set by leg length and position behind the BB.

Dropping the bars will lengthen your reach

but to fix that you would get a shorter stem.

Rachel Ostrander
Author
Rachel Ostrander
Rachel is a career coach and HR consultant with over 5 years of experience working with job seekers and employers. She holds a degree in human resources management and has worked with leading companies such as Google and Amazon. Rachel is passionate about helping people find fulfilling careers and providing practical advice for navigating the job market.