Bike Pedal Extenders

(26 customer reviews)


Brand: Fit Kit Systems

Bike Pedal Extenders alleviate pain and inefficiency by allowing you to achieve your natural stance width on the bike.  Available for both pedal wrench flat and hex key pedal styles, and as a pair or single-sided.


Why bike pedal extenders? Are your feet far enough apart when you ride?  Do you experience knee or hip pain while riding?

As a cyclist, bike shop, or bike fitter you can change pedals but this all too often does not significantly impact the distance of the feet from one another.  Whether you’re 5 feet tall and 95 pounds, 7 feet tall and 250 pounds, or any height or weight on standard bicycles, your feet are the same width apart.

Cycling stance width is usually determined by your bicycle wheel width, crank width, and/or pedal spindle length (most pedals have the same width). Unfortunately, this does not work for everyone and many times causes pain or limits performance which is why Fit Kit Systems is proud to offer a ride-changing experience with pedal extenders.

Bike Pedal Extenders Features and Benefits

  • Alleviate knee or hip pain resulting from riding with feet too close together
  • Create optimal function of the body based on natural, increased stance
  • Improved foot comfort and power transfer
  • Increased efficiency
  • Reduce unwanted knee movement (the figure-8 or keyhole knee movement pattern)
  • Pedal extenders offer a significantly greater increase in stance width (sometimes erroneously referred to as Q factor) than what can be achieved with cleat adjustments or the use of pedal spacers (washers) on the pedal axle.
  • Solve the problem of the heel or the foot rubbing against the chainstay
  • Allows larger feet not to press or rub against the crank

Attachment Type: Wrench (pedal flat) or Hex (through crank installation)

  • Wrench – solid body pedal extenders are intended for use with pedals installed using a 15mm pedal wrench.  Common on lower-end road and mountain bike pedals and the original Speedplay pedals.  These require an 18mm or an adjustable wrench for removal.
  • Hex – hollow body with a 6mm adapter hex collar intended for use with pedals that do not have wrench flats.  The Hex collar needs to be inserted in an 8mm recessed end of the pedal spindle before installation. For use with all pedals without wrench flats machined on the axle or any pedals that require a hex or Allen wrench for installation. This includes most modern road, gravel, and mountain bike pedals including higher-end Shimano models, Look, Time, Assioma, Wahoo Speedplay, and Crank Bros.  Installation requires the use of a 6mm hex key or wrench.  Removal requires both a 6mm hex key and an 18mm or adjustable wrench.

Bicycle Pedal Extenders Safety & Precautions

  • Our pedal extenders are a proven design made of strong stainless steel
  • Independently load and fatigue tested
  • They meet ISO 4210 requirements for bicycle pedal and drive systems
  • Not recommended for use with carbon fiber (composite) crank arms
  • Recommendations for use do not constitute medical diagnosis or advice


  • Extension Length: 19mm
  • Thread Diameter: 9/16″
  • Material: Stainless Steel

Purchase Options:

  • Pair (most common) or single side only.

Package Contents

  • Varies based on the type chosen.
    • Hex or hollow body will include a hex adapter collar matching the number of extenders (1 or 2)
    • Wrench or solid body will only include the number of extenders chosen (1 or 2)

Why Pay More?

As a diligent online shopper, you have probably found bike pedal extenders for dirt cheap on the world’s largest online shopping emporium. Why do ours cost 3 or 4 times as much?  Because they are the real deal – from design to manufacturing to testing.  Ours are not a copycat knockoff of dubious origins and structural integrity.  You’re paying more for confidence and safety, backed up by our brand reputation. Think of it as an insurance premium. Pay less and your potential future medical bill may be substantially higher.

*Results may vary.

Additional information

Weight0.2 lbs
Dimensions3 × 2 × 1 in
Pedal Attachment

Wrench, Hex

Left and/or Right

Pair, Left only, Right only

26 reviews for Bike Pedal Extenders

Customer Images

Image #1 from William Tan
Image #1 from William Tan

William Tan

These are made extremely well. It looks super robust and looks like it will survive anything.

(0) (0)
Image #1 from William Tan
5.0 Rating
1-5 of 26 reviews
  1. Verified reviewVerified review - view originalExternal link

    (0) (0)
  2. Verified reviewVerified review - view originalExternal link

    These extenders really help my customers with pedal stance issues.

    (0) (0)
  3. Verified reviewVerified review - view originalExternal link

    as expected. perfect

    (0) (0)
  4. Verified reviewVerified review - view originalExternal link

    (0) (0)
  5. Verified reviewVerified review - view originalExternal link

    You have to install the extenders carefully. I installed the extenders to the crankarms first, to 36Nm torque which is in the 30-40Nm range most pedal manufacturers recommend. Then I installed the greased hex collars and pedals into the extenders. Make sure to use grease or anti-seize compound on the pedal and extender threads too. You can’t tighten the pedals very tight into the hex collars in the extenders or you will deform the hex collar, and then you’ll never get the pedal apart from the extender again. Also note that some crankset and pedal manufacturers don’t recommend using pedal extenders with their pedals or even with aluminum cranks, and will void your warranty if you do. I wouldn’t use them with Shimano Hollowtech cranks or with pedals that have titanium axles. And don’t even think about using them with carbon cranks. Very little of the above info was available on the website (that I could find), and no instructions were included with the extenders. All of that said, they are working fine with my SRAM Rival aluminum cranks and I will also be using them with aluminum Praxis cranks. And most importantly, my knees have never felt so good! And not just my knees, but hips, feet, ankles — everything feels so much better with a wider foot stance. It’s very noticeable during and even after rides. Until we get cranksets with much wider q-factors and pedals with custom length spindles, these extenders are the next best thing.

    (0) (0)
Add a review
Bike Pedal Extenders Bike Pedal Extenders
* Rating is required
Your review
* Review is required
* Name is required
Add photos or video to your review
* Please confirm that you are not a robot


Yes! You can use a 2mm Form pedal washer with each extender for a total of 21mm extension. Do not use more than 1, 2mm washer per side.

The general guideline is a weight limit of 220 lbs. Our Bike Pedal Extenders are made of Stainless Steel.  We have our extenders safety tested by an independent lab for both load and fatigue.  They meet the ISO 4210 requirements for bicycle pedal and drive systems. 


Pedal extenders are generally compatible with most types of bicycles, including road bikes, mountain bikes, hybrid bikes, e-bikes, and even stationary exercise bikes. However, compatibility may vary based on the threading and design of your specific pedals and crankarms. Remember, the Fit Kit Pedal Extenders use 9/16″ threading.  Always check the product specifications and consult and contact us if you are unsure about compatibility. Additionally, there are power pedals that may not be compatible with cycling Pedal Extenders where the control unit lies at the end of the threads i.e. Garmin Rally RS200.

The solid wrench flat extenders.  The hex hole is likely only 6mm, not the required 8mm to use the hollow extenders, and the solid ones are also more robust.

As a diligent online shopper, you have probably found bike pedal extenders for dirt cheap on the world’s largest online shopping emporium.  Prices sometimes range from $12-$15.

Why do Fit Kit Systems’s pedal extenders cost 3 or 4 times as much?

  • The design was created by an experienced engineer
  • Our manufacturing is QC’d and reviewed properly to ensure structural integrity
  • We don’t compromise or cut corners on the materials used to save money
  • We thoroughly test our products to ensure they function properly and are safe for you to ride for thousands of miles

You pay more for what you want in every product: confidence, safety, trust, and peace of mind backed up by our brand reputation.  In some products, this may not be as much of a concern but considering the majority of pressure and power on the bicycle go directly to the pedals, it’s certainly not an area you want to take a chance.

Read through the reviews of the cheaper products online and you will find many cases of pedal extenders failing causing injuries to both riders and their bikes.  When you place an extra investment into our pedal extenders, think of it as an insurance premium: pay less and your potential future medical bill may be substantially higher.

We understand that some cyclists may prefer shorter pedal extenders, but there are practical reasons why we don’t offer lengths shorter than 19mm:

  1. Safety and Functionality: Pedal extenders must strike a delicate balance between addressing issues related to foot positioning, knee alignment, and comfort while maintaining safety and functionality. To achieve this, they require a safe number of threads both for going into the crank and for the pedal to fit into the extender. This ensures a secure connection and minimizes the risk of threading issues, instability or at worse, product failure.
  2. Manufacturing and Engineering Constraints: Producing extremely short pedal extenders can be challenging from an engineering and manufacturing perspective. The threading and structural integrity of the extenders become more complex as they get shorter, which can increase production costs and reduce reliability.

Here are a few other options to increase stance width but not to the extent of 19mm extenders:

From the Garmin website:
“Many (most) pedal extenders do not have sufficient thread depth to properly accommodate the inboard end of the spindle. Torquing the pedals into these extenders will crush the plastic cap on the spindle and damage the electronics. If the pedals are not properly torqued in, then they may come loose during riding which would pose a safety hazard.

Secondarily, the radio antenna is located at the inboard end of the spindle. Enclosing the antenna within a metal pedal extender will substantially degrade the radio performance such that the communication to the head unit (or pedal to pedal) is going to be unacceptable.”

You may also like…