Is Knee Pain Stopping You From Cycling? Here Are the 3 Most Common Causes.

TL;DR

Persistent knee pain in cycling is rarely random. It is usually caused by incorrect saddle height, poor cleat position, or underlying muscular imbalances. These issues change how load is distributed through the knee during repeated movement. Addressing the root cause through a structured, physio-led approach supports pain-free cycling and long-term riding consistency.

Knee Pain Is Not Something You Should Work Around

Knee pain is one of the most common issues cyclists face.

It often begins as mild discomfort, but can worsen over time due to the repetitive nature of cycling. Eventually, knee pain can limit how often or how far you ride - not ideal! 

Many riders try:

• Adjusting saddle height slightly

• Modifying cleat position

• Taking short breaks from riding

These are the right steps to take, however, if the pain persists, the underlying cause has likely not been addressed.

Cycling places repetitive load through the knee. While your cleats are locked in to the pedals, and your bottom planted on the saddle, the knees remain unsupported which is why alignment is so important. 

Understanding the cause is the first step toward resolving it.

Cause 1: Incorrect Saddle Height

Saddle height is one of the most influential factors in how the knee functions during cycling.

Even a small error can change how force is applied through the joint.

Saddle Too High

When the saddle is too high:

• The knee extends too far at the bottom of the pedal stroke

• The hips may rock side to side to “reach” to the pedals

• The rider may feel as though they lose contact at the bottom of the pedal stroke, rather than control the movement

This can create strain at the back or outside of the knee - specifically the hamstring or iliotibial band, respectively. 

The movement may feel acceptable at first. As muscles fatigue over longer rides, discomfort begins to develop.

Saddle Too Low

When the saddle is too low:

• The knee remains in a more flexed position throughout the pedal stroke

• Load increases at the front of the knee; known as patellofemoral compressive force.

• Movement may feel restricted and inefficient

This is one of the most common contributors to persistent knee pain when cycling.

Why Saddle Height Matters

The repetitive nature of cycling means that small issues with bike fit can become amplified over time. Getting your seat height (and cleat position) right allows the knees to track through their natural physiological pattern. 

If the knee is consistently tracking outside of this pattern, over time, discomfort and injury can arise. 

Correct saddle height allows:

• Controlled extension of the knee through the downstroke

• Stable hips on the saddle

• Even and symmetrical pedal stroke

Small adjustments can create meaningful changes in how the knee responds.

Cause 2: Poor Cleat Position

Cleat position is often (and mistakenly) overlooked, but it plays a significant role in how the knee tracks during pedalling.

Alignment and Knee Tracking

The foot is the connection point between your body and the pedal.

If the cleat position is not aligned with your natural movement:

• The knee may track inward or outward, relative to your natural pattern

• Rotational / resistive forces may occur during the pedal stroke

• Load may become uneven

These changes are subtle but repeated with every pedal stroke, and can result in discomfort over time.

Understanding Q-Factor

Q-factor refers to the horizontal distance between your pedals and influences how your hip/knee/ankle tracks during cycling.

If your Q-factor does not match your natural stance:

• Forces can act on the knee joint (force pushing the knee inwards, or outwards)

• Compensatory movement may occur to protect the knee

• Discomfort can arise - often at the inside or outside of the knee. 

Cleat position adjustments can help align the lower limb more effectively to allow natural movement patterns.

Why Cleat Setup Is Often Missed

Unlike saddle height, cleat position is not immediately visible.

Many riders do not adjust it unless there is a clear issue.

However, it directly affects how force travels through the knee.

Even small changes in cleat angle or position can influence tracking and load distribution.

Cause 3: Muscular Imbalances

Not all knee pain is caused by the bike setup.

The body itself often contributes.

How Imbalances Develop

Muscular imbalances can develop due to:

• Previous injuries

• Differences in strength between sides

• Limited mobility in specific joints

• Movement patterns that develop over time

These factors influence how force is generated and controlled.

Impact on the Knee

When muscles are not working evenly:

• Uneven forces act upon the knee joint

• Movement patterns are reinforced through repetition, which can exacerbate the problem over time

• The body may compensate to offload the knee

Why Adjustments Alone May Not Work

If the issue is related to movement patterns or strength:

• Adjusting the bike may provide partial relief

• The underlying cause may remain

This is why some riders continue to experience pain despite multiple adjustments - the underlying cause hasn’t been addressed. 

The Role of Physiotherapy

Physiotherapy helps identify:

• Movement limitations

• Strength imbalances

• Stability issues

Addressing these factors supports a targeted approach to improving bike fit, better alignment and reduction in strain on the knee.

Why a Physio-Led Bike Fit Is the Ultimate Solution

Many cyclists approach knee pain by adjusting the bike, which can be helpful, but doesn't always solve the problem.

Looking Beyond the Bike

A physio-led bike fit considers:

• How your body moves

• How your body responds to load

• Body limitations or previous injuries, and how they can be addressed.

This provides a more holistic view of the cyclist and their interaction with the bike. 

Identifying the Root Cause

Instead of focusing only on position, the process identifies:

• Why the knee is under stress

• Where compensation is occurring

• How movement patterns have developed and how they influence the issue

This approach targets the source rather than the symptom.

Integrating Movement and Position

A structured process combines:

• Bike adjustments

• Movement assessment on and off the bike

• Ongoing refinement and incremental adjustments where required

This helps:

• Improve alignment

• Reduce unnecessary strain

• Support long-term outcomes

Moving Away From Trial and Error

Without structure, adjustments often rely on guesswork.

A physio-led approach reduces this by:

• Observing patterns

• Testing changes

• Refining based on response

This leads to more consistent results.

What This Means for You

If cycling knee pain has persisted despite your efforts, the cause is likely to be positional or a result of asymmetry on the bike (or of the body).

It is often linked to:

• Position - seat height, saddle set-back, cleat setup

• Alignment - asymmetries on and off the bike

• Movement - the movement patterns that the cyclist has developed over time

Addressing all three provides a clearer path toward resolution.

A Practical Self-Check

Consider this:

Does your knee pain appear in the same location at a similar point in every ride?

Consistent patterns may indicate a specific cause.

Internal Next Steps

If knee pain is affecting your riding:

• Learn how a structured approach can help → /services

• Take the next step toward resolving the issue → /book

The Aim

The aim is not to manage knee pain temporarily, but to identify the underlying cause, adjust your position and movement accordingly, and support pain-free cycling over the long term.

This is the approach taken at Aerro Physio Bike Fit, where the focus is on resolving the root of the issue rather than working around it.

FAQs

1. What is the most common cause of knee pain in cyclists

Incorrect saddle height is one of the most common causes, followed by cleat misalignment and muscular imbalances.

2. Can saddle height alone fix knee pain

It can help in some cases, but needs to be considered in the context of the cyclists riding history, injury history, and overall position on the bike.

3. How does cleat position affect knee pain

Cleat position influences how the knee tracks during pedalling and how load is distributed. Not all cleats are equal, and cleat ‘float’ needs to be considered in these cases. 

4. What is Q-factor in cycling

Q-factor is the distance between the pedals, which affects a rider’s stance width, leg alignment and knee tracking.

5. Can muscle imbalances cause knee pain

Yes. Imbalances can change movement patterns and increase stress on the knee.

6. Why is a physio-led bike fit recommended

It identifies the root cause by assessing the rider’s movements both on and off the bike, rather than relying only on adjustments through a prescribed method. 

About the Author

Harri Harvey

Physiotherapist at Aerro Physio Bike Fit

We proudly help cyclists ride stronger, faster, and pain-free through expert physiotherapy bike fitting. Harri is an experienced physiotherapist and bike fitter with additional training in bicycle mechanics. through the use of motion-capture technology and detailed bike fitting practices we aim to optimise your position, improve performance, and prevent injury on the bike. Whether you’re a competitive rider or a weekend cyclist, Aerro Physio Bike Fit ensures a personalised approach to improve your comfort, efficiency, and confidence on every ride.