Flat Handlebars on Road Bikes: The Downside of Using Them

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Flat handlebars have steadily grown in popularity among road bike enthusiasts for their ergonomic benefits and comfort.

While they offer some advantages for a more casual riding style, drop handlebars remain the traditional and optimal choice for serious road biking due to their performance and control.

flat bar on a road bike
flat bar on a road bike

In this article, we will explore the key differences between flat and drop handlebars and examine why drop handlebars are better suited to leveraging the full benefits of a road bike’s design.

Flat handlebars offer more hand positions for a comfortable upright posture ideal for neighborhood rides and shorter outings.

However, serious road biking demands optimal aerodynamics, control, handling and responsiveness – attributes that drop handlebars better provide.

Proper bike fit is also essential to translate a bike’s performance potential into actual performance, and most road bikes are designed to accommodate drop handlebars.

Let’s delve into how limited hand positions, ergonomic issues, control compromises, and incompatibility with components translate into real drawbacks when flat handlebars are used on road bikes.

In the end, we will look at some possible adaptations as well as alternative hybrid handlebar designs that aim to combine the best of both worlds.

Understanding the Purpose of Handlebars on Road Bikes

understanding the purpose of handlebars on road bikes
understanding the purpose of handlebars on road bikes

The handlebars of a road bike play a pivotal role in translating its design into real-world performance. There are four key functions that well-designed road bike handlebars must serve:

Comfort and Control

Handlebars need to provide sufficient hand positions to ensure comfort during long rides while still allowing for precise control and responsiveness. Multiple hand positions are particularly important to reduce hand fatigue.


To maximize speed, road bike handlebars should allow riders to maintain an aerodynamic posture that minimizes wind resistance.

Handling and Stability

Handlebars influence how well the bike corners, steers and maintains stability, especially at higher speeds. Ideal handlebar design enhances handling and stability.

Braking Power

The positioned of the handlebars, as well as the ability to apply braking force from multiple hand positions, directly impacts how effectively and quickly brakes can be applied.

These four performance metrics – comfort and control, aerodynamics, handling and braking power – define the key purposes that road bike handlebars aim to optimally fulfill.

A particular handlebar design’s ability to meet these goals determines how well it leverages a road bike’s functionality and potential performance advantages.

Differences between Flat and Drop Handlebars

differences between flat and drop handlebars
differences between flat and drop handlebars

While both flat and drop handlebars can be used on road bikes, there are key differences in their design that impact how well they fulfill the four primary functions of road bike handlebars.

Flat handlebars

  • Provide only one hand position – gripping the ends of the bar. This limits comfort on long rides and produces an uncomfortable, leaning-forward posture that increases aerodynamic drag.
  • Their wide configuration compromises handling, stability and control at higher speeds due to the distance between the hands.
  • Limit the ability to apply maximum braking power since the rider can only brake from one hand position.

By contrast:

Drop handlebars

  • Offer multiple hand positions at various locations on the bar that promote comfort as well as an aerodynamic posture. This reduces fatigue and wind resistance.
  • Place the rider’s hands closer together, enhancing handling, cornering precision and stability at speed.
  • Allow braking from multiple hand positions, maximizing braking power.

In summary, while flat handlebars offer a more casual and upright riding position, drop handlebars fulfill the core performance criteria of road bike handlebars in a more optimal way.

The Importance of Proper Bike Fit

Regardless of handlebar choice, one crucial factor that determines a road bike’s performance is proper bike fit.

An optimal bike fit aligns the bike’s geometry and components with the rider’s body in a way that promotes power transfer, control, comfort and aerodynamics.

A road bike is designed around drop handlebars, with stems, gears, brakes and other parts positioned accordingly.

When flat handlebars are substituted, proper bike fit becomes especially critical to compensate for the dimensional and ergonomic differences between the two types of handlebars.

This may require adjustments such as:

  • Raising the stem to bring the flat handlebars to a similar reach and height as the drop bars.
  • Rotating the stem to change the angle of the handlebars for optimal positioning.
  • Adjusting the gear and brake levers to align with the wider hand positioning of flat bars.

Overall, professional bike fitting becomes even more imperative when flat handlebars are used on a road bike, to translate the bike’s potential performance to actual performance through proper fit.

Issues with Flat Handlebars on Road Bikes

issues with flat handlebars on road bikes
issues with flat handlebars on road bikes

Beyond fit and compatibility concerns, flat handlebars on road bikes present several inherent issues due to their design characteristics:

Limited Hand Positions

Due to only providing a single hand position – gripping the ends – flat bars severely limit comfort on long rides. Riders have no option to shift hand positions, leading to increased wrist, palm and hand fatigue. The constrained posture also compromises aerodynamics and efficiency.

Lack of Aerodynamics and Efficiency

With no alternative to the forward-leaning riding position necessitated by flat bars, riders incur significant aerodynamic drag. This results in lower speeds, increased effort and reduced pedaling efficiency.

Pressure Points and Numbness

The static posture and concentrated pressure points where riders grip flat bars often leads to nerve compression, tingling and numbness in hands and fingers – reducing control and comfort.

Handling and Control Issues

Beyond comfort and performance disadvantages, flat handlebars on road bikes also present tangible handling and control issues due to their wider spacing:

Reduced Stability

With the rider’s hands placed further apart on flat bars, it is more difficult to maintain balance and stability, especially at higher speeds. The wider hand position makes counterbalancing and reacting to unstable conditions less intuitive.

Impaired Cornering and Steering

The wider grip provided by flat bars hinders precision and maneuverability when cornering, turning and steering. Maneuvering the front wheel requires more effort due to the increased distance between the hands.

Compromised Braking Performance

Since flat bars only provide one braking position, the ability to apply maximum, balanced braking force from both hands is limited. This reduces both braking power and control during heavy or emergency braking situations.

Compatibility with Road Bike Components

compatibility with road bike components
compatibility with road bike components

Beyond ergonomic and performance issues, flat handlebars on road bikes also face compatibility challenges with components designed for drop bars:

Shifter and Brake Lever Placement

Road bike components like gear and brake levers are positioned assuming the rider’s hands will be in multiple locations on drop bars.

When flat bars are substituted, levers often no longer align well with the rider’s single hand position, compromising ease of use.

Integration with Road Bike Accessories

Accessories like computers, lights and GPS mounts are often designed to attach at specific points on drop bars.

Flat bars often lack compatible mounting points, meaning accessories must be situated in suboptimal locations or special adapters are required. Functionality can be compromised as a result.

The Psychological Aspect

Beyond functional differences, the choice of flat over drop handlebars on a road bike also impacts riders on a psychological level:

Perception and Image

Drop handlebars have long been seen as the defining characteristic of road bikes. Their substitution with flat bars can influence how riders perceive and identify with their bike, affecting self-image and sense of belonging.

Social and Community Factors

The cycling community and different cycling subcultures often form around shared bike types and tendencies. Flat bars on a road bike may impact a rider’s ability to connect with road biking subcultures and communities.

Although rarely a primary concern, handlebar choice does impact riders in subtle psychological ways that influence emotional connection, perception and social experience.

Potential Adaptations

potential adaptations
potential adaptations

While drop handlebars remain ideal for optimizing a road bike’s performance, some adaptations can help mitigate flat handlebars’ disadvantages:

Adding Bar Ends or Extensions

Attachable bar ends or extensions can provide a second hand position for comfort and control. However, they only partially address fit and aerodynamic issues, and usually compromise stability.

Hybrid Handlebars

Combination flat-drop handlebars merge ergonomic advantages of both styles. While offering better versatility, they fail to match the optimal comfort, control and aerodynamics of true drop bars.

Neither solution fully resolves the primary functional deficits of flat bars on road bikes. However, adaptations can potentially improve riding experience for those prioritizing comfort over peak performance.


In summary, while flat handlebars offer benefits for casual and low-effort riding, drop handlebars remain the superior choice when optimizing a road bike’s performance potential.

Their ergonomic design, multiple hand positions, enhanced aerodynamics and superior control come together to fulfill the primary functions of true road bike handlebars.

While proper bike fit and aftermarket adaptations can help when flat bars are used, fundamental issues around comfort, aerodynamics, handling and compatibility remain.

Only purpose-designed drop bars, equipped with multiple hand positions and a geometry tuned for road biking, can truly leverage the engineering, components and intentions built into a road bike.


Are flat handlebars suitable for beginners?

While flat handlebars offer a more comfortable and upright position ideal for starting out, they come with drawbacks even for beginners.

Limited control, numbness risks, and compromised performance can actually hamper learning in the long run.

For beginners prioritizing comfort at first, flat bars may work, but drop bars will better set riders up for optimal skill development as they progress.

Ultimately the most suitable handlebars for beginners are the ones that motivate continued riding and improvement.

Can I convert my road bike with flat handlebars?

In theory yes, but there are fit, compatibility and performance challenges as outlined in the article.

Proper bike fit becomes critical, component positions often need adjusting, and aerodynamics, control and handling will generally be compromised.

While possible, a true flat bar road bike conversion usually requires compromises. The extent to which these impact the riding experience depends on an individual’s priorities, fitting options and willingness to adapt.

How does riding style affect handlebar choice?

Riding style is one of the most important factors in selecting the optimal handlebars. For racers and performance-oriented riders, drop bars will generally prove superior due their design for control, comfort and aerodynamics on long rides.

Meanwhile, flat bars likely suit recreational riders wanting an upright, comfortable position for shorter rides with an emphasis on visibility.

Hybrids aiming for a balance may value versatility over peak performance. Ultimately, deciding which aspects of riding matter most helps determine whether flat bar convenience or drop bar optimization aligns closest with one’s priorities and desired experience.