# Question: How do you measure a road bike stem?

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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 my bike stem size?

Know the length by measuring from the middle bolt of the bike’s headset top to the center of the handlebar. Ensure that you measured the length in centimeters or millimeters. A bike stem length usually runs in 10 mm increments and starts from 70 mm to 140 mm.

## What diameter is a road bike stem?

In recent years the “oversized” or 31.8mm stem clamp diameter has become the industry standard for both road and mountain handlebars. Older road handlebars commonly have a 26.0mm diameter, whereas older mountain bars usually have a 25.4mm diameter.

## How do I know what size stem to Buy?

When purchasing a stem, you should consider several factors. First you must look at the steerer type (threaded or not). Then you must match it to a steerer tube diameter and a handlebar diameter. Finally, you must decide what length and how much rise or drop you want your stem to give you.

## Is a 60 mm stem too short?

60 might be a little short. 70 sounds short but not unreasonable. a shorter stem will make the bike feel twitchy.

## How do you measure the diameter of a handlebar stem?

If you don’t have callipers then you can use a simple measure tape. Just wrap around the bar at the point you want to attach the Oi to get the circumference size and then divide by pi (…. mmm) to get your diameter e.g. 99.9mm / = 31.8mm. If you have no tape, then use a piece of paper (or string).

## Is 70mm stem too short for road bike?

The sweet spot is generally accepted as being 100mm to 120mm, but not everyone agrees. ‘It’s a bit of a cliché that a too-short stem will over-quicken the handling. … ‘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.

## Is 60mm stem too long?

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. … For those aggressive trail bikes out there, we recommend using a stem in the 50-60mm length 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.

## 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.

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## 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.

## Is a 80mm stem to short?

For someone your size, 80mm is too short. The fact that you can see the hub means the weight balance is shiftied backwards. No big issue you might think – and so did I until i rode a race with an 80mm stem on my medium TCR.