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New product -40%Adjustable stem with plunger 25.4 mm- €12.59
- €20.99
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New productAdjustable stem Zoom- €24.99
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New productHigh stem with plunger- €12.99
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New productTranz x shock absorber stem- €22.99
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UsedPlunger stem 90 mm- €5.99
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The plunger bicycle stem, also called a quill stem or plunger stem, is a type of classic bicycle stem that attaches directly to the head tube of the fork. It is commonly used on vintage bicycles, traditional city bikes and some older road bikes. Its simple and robust design, characterized by a stem inserted into the fork, offers advantages in terms of adjustment and retro style.
Characteristics of the plunger bicycle stem
1. Direct Installation in the Fork:
The plunger bicycle stem is inserted into the steering tube of the fork using a threaded rod which attaches to the inside of the tube. An expander tightening system locks the stem once in place, providing good stability.
2. Simplified Height Adjustment:
The plunger bicycle stem allows you to easily adjust the height of the handlebars by simply adjusting the depth of the insertion into the fork. This system is convenient for cyclists looking to customize handlebar height without having to add spacer rings like modern systems.
3. Materials and Retro Aesthetics:
Typically made of steel or aluminum, the dip bike stem maintains a vintage aesthetic that adds a touch of style to classic bikes. Steel models are sturdy, while aluminum ones are lighter while still being durable.
4. Integrated Design:
With its one-piece design, the dipper stem is often thicker and less adjustable in length than modern stems, giving it an integrated, minimalist look. It generally does not have external clamping for the handlebars, giving it a sleek style.
Specificities of the plunger bicycle stem
Compatibility with Threaded Forks:
The dipper stem is only compatible with threaded forks, which are mostly found on older bikes. Modern bicycles mostly use threadless forks (aheadset type), which are incompatible with diver stems.
Limited Height Adjustment:
Although the dipper stem allows height adjustment, it has a limit to the depth of insertion into the fork. This limit is marked on the stem of the stem to ensure secure installation.
Solidity and Simplicity:
The expander fixing system is robust and reliable, suitable for urban use and walks. The dip stem is less suitable for intense practices (such as mountain biking or competition) due to its limitations in terms of stiffness adjustment and dynamic adjustment.
Length and Angle Options:
Stems are often available in different lengths and with varying angles (e.g., 0°, 10°, 15°) to allow customization of the handlebar position, although these options remain more limited than for modern stems.
Uses of the Diving Stem
The plunger bicycle stem is particularly suitable for certain types of bikes and uses:
City and touring bikes:
On city bikes and Dutch bikes, it allows you to adopt an upright and comfortable riding position, ideal for urban journeys and casual rides.
Vintage and Restoration Bikes:
For vintage bike enthusiasts or those restoring an older model, the dipper stem is an authentic choice that respects the original design of the bike, while allowing some height adjustments.
Classic Road Bikes:
On some classic road bikes, the dipper stem allows you to maintain a retro look while providing a comfortable position for long rides.
In Conclusion
The plunger bicycle stem is a timeless component, appreciated for its simplicity, its vintage aesthetic and its height adjustability. Although it is not suitable for modern sporting practices, it remains ideal for urban cyclists, retro bike enthusiasts, and restoration projects. Thanks to its reliable fixing system and its retro style, it brings a classic and elegant touch to city bikes and traditional models, while allowing optimal comfort for daily journeys.
Other types of stems:
