Generically speaking....

I just got a pair of 20mm pedal extenders and they are a game changer for my knees.

I absolutely did not believe that 20mm could possibly make much of a difference.

I was so wrong

One of my knees was always killing me. Not just when I rode but pretty much all the time. I figured it was scar tissue building up from having ACL surgery 20 years ago. And I assumed biking was making it worse but I didn't think biking was the problem.

I had to wear a brace when I biked or it would always be 10 times worse afterwards.

On a whim I got pedal extenders. (Actually it was after reading an article on knee pain in Bicycle Magazine. Free subscription. Only reason I read it.) And INSTANTLY there was a difference.

My pain was on the side of my knee...the side facing the other leg. (So left knee...right side of left knee). The article I read said pain there means your legs aren't straight enough on the down stroke when biking.

The 20mm made all the difference in the world.

I got these 6 weeks ago and I stopped riding with my knee brace immediately. I haven't had the slightest bit of knee pain since. Not on the bike. Not walking. Not hiking up hills. Nothing.

Turns out the biking was 100% of my knee pain problem and the pedal extenders eliminated it in 1 day.

My knee hasn't felt this good in years