Bike Pedal Extenders

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 pedal extenders are all 17-20mm, or more.

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.

The shortest extender we carry is the Croder Pedal Extenders at 17mm per side, 2mm shorter than our 19mm Bike Pedal Extenders.

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

• Pedal Spacers
• Form Speedplay Cleat Extender Plate – ML9
• Form XPS plates for Look, Time and Shimano road pedals/cleats

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.

Short Answer:  NO

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.”

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. 

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.

Choose the solid, wrench-flat style. The hex style needs an 8mm hex socket in the end of the pedal spindle, and on most SPD pedals that socket is only 6mm. The solid body is also more robust, so it is the better choice whenever your pedals have wrench flats.

Generally, yes – the pedal extenders should be fine. Your weight is not an issue. Standing sprinting concerns me more than seated sprinting, as due to the wider stance width there will be more lateral leverage into your bottom bracket and therefore bike frame, which is not designed to take load that way. So you would likely feel more frame flex if you were standing and putting down the power.
If the pedal extenders themselves get overloaded they will start to deform and bend, so it would feel like riding on a pedal with a bent axle. The material wont suddenly fail and shear off, so you would get advance notice that something was going wrong. We’ve had a few reports of that happening, more so from large riders on mountain bikes.
The big thing in my mind is a reduction in cornering clearance, so I’m more concerned about pedal strikes happening when cornering during crits. Keep the inside up!
No issue for general road racing.

No for power meter pedals with the electronics built into the axle.  The pedal extender blocks data transfer to your head unit, and in some case the threaded axle portion is too long to screw into the extender without damage to the end cap and internals in the axle body.

This includes the newer generation Garmin Vector and Rally, and Assioma Gen 2 power meter pedals, including the Pro RL, Pro RS and Pro MX.

Yes for power meter pedals with an external pod for the electronics.  This includes Assioma Favero Gen 1 (single or double side) and the Wahoo Pwr Lnk Pedals. With these, the key thing to pay attention to is that there is clearance between the pedal extender and the power pod on the pedal.  It’s possible you may need to add a pedal washer between the power pedal and the pedal extender.

In all cases you will need the hex style pedal extender.  Be sure to insert the hex collar into the end of pedal axle before attaching the pedal to the extender.  You don’t need this to tighten everything up, but you do need it to remove the pedal from the extender.