Road Bike Handlebar Stem Length

As a rule of thumb on a road bike you shouldn t run a stem much shorter than 90mm or much longer than 130mm.

Road bike handlebar stem length.

Competitive racers will opt for a longer 120mm stem for optimum stretch. One good rule of thumb for choosing the correct length stem and it works for the road cc team is to sit on the bike with your hands on the top of the hoods and look down at the front hub. The rise angle of stem from fork to bar has quite a large effect. Stem length will vary with the design of the bike.

In order to alter stem length you must first know the length of your current stem. Dimension 31 8 stems are fully forged 6061 t6 aluminum stems that have a 4 bolt handlebar clamp. Assuming you have a handlebar you want to marry you can use stem length to keep reach within proper fit guidelines for your type of riding but that won t do much for drop without also affecting the height of the top and hoods. Stems help you achieve a proper bicycle fit.

If you can see the hub in front of the handlebar the stem is too short. For non racers of many disciplines the top of the bars may be even with the saddle or even higher. Mountain and road bike stems are available in different lengths and rises to suit the needs of any rider. Stem length designated in millimeters may be indicated on the stem.

The overall length of the vertical portion of the stem. Comfort should be your guide when adjusting the height of the handlebars. Proper positioning on the bike. The road bike racer typically has the top of the handlebars below the seat height.

The effective height gained as a function of the stem s angle and length. It must also address the rider s comfort biomechanics performance needs and the steering and handling of the bike. The most important consideration when choosing a road stem is the stem length considered as a key factor in the overall fit of the bike. This less than 90 degree angle applies to road bikes touring bikes and indoor bikes.

If the stem length is correct the handlebars should completely hide the front hub. However most stems are not marked and must be measured in order to determine size. Measured vertically from the center of the handlebar clamp to an imaginary line that bisects the central meeting point of the extension and vertical portion of the stem.