Our Left and Right solid stainless steel 20 mm Pedal Spacers (Pedal Extenders) are used with knees that track outside the pedal by adding length to the pedal axle. Designed to move the foot out and away from the crank arm to provide more foot clearance, they add to stance width for cyclists needing help with knees-out, excessive toes-out, extra wide feet, wide hips, or for those with discomfort on the outside of the knee.

These two (2) 20mm Pedal Spacers (Pedal Extenders) are sold as a pair. 

Note:

• 20 mm Pedal Spacers (Pedal Extenders) will only work with pedals that have a flat spot in which to tighten/loosen the pedal. These 20mm Pedal Spacers will not work with pedals which can only be tightened/loosened with an Allen Key.  If your pedals only install with Hex Key Allen Wrench then please select Hex+ Pedal Spacers (part# 4030628) instead of these.
• 20 mm Pedal Spacers (Pedal Extenders) are NOT recommended for use with carbon cranks.
• Maximum rider weight - 275 lbs / 125 kg.
• Not compatible with the following:  Look Keo Sprint, Look Easy Pedals, or Garmin Vector 3s
• 15mm wrench required for pedal flats.  18mm or adjustable crescent wrench required to install Pedal Extenders.
• 1.6oz or 44g each spacer

These spacers have been great! My biomechanics are much improved and my legs feel much fresher after rides than before I installed the spacers. Thank you very much for a well-designed and effective product!
-Dan 

Ordered them, installed them and BOOM, knee pain gone.
-Bill

Your spacers and quality service have helped me a ton!  Two years ago I compacted (fractured) my left femur (fell hard on the left side going slowly through hard-to-see SLIMY concrete under 1” of water - sheesh!) 

No surgery, and now I toe out on the left quite a bit for an ergonomic stroke.   Your spacers and cleat shims have made ALL THE DIFFERENCE!      Easy to install, last forever, sturdy, and customer service that can’t be beat.   Thanks for helping our bike tribe keep rolling!    I’ve got your product on road, mtn, cross, and tandem bikes!     Still racing in the geezer 60-plus divisions thanks to you. 

-Jim, Boulder, Colorado

I started indoor biking for my daily cardio and loved the workout until after biking 5 days a week for about 3 weeks. I began getting bad knee pain preventing me from biking back to back days and it even got to the point of effecting my daily routines. Did some research and stumbled onto BikeFit, found that I was experiencing knee pain due to poor alignment with my pedals on my indoor bike. I ordered 20mm pedal spacers, received them quickly and installed them immediately and began biking again to see if the knee pain would improve. It did! My knee pain was gone completely even biking 7 days a week! Highly recommend giving the pedal spacers a try if you experience any pain from biking and not give up on it! They are high quality spacers and easy to install!
-Bryan L. - Shoreline, WA