Fietsen op Maat Crank Shortener - Universal Left or Right Fitting - Each

I recommend this product

What a difference this has made to my friend who has had a knee replacement but now has limited movement and was unable to cycle. Now he can and as his movement increases he will be able to move the shortener to lengthen his stroke. Brilliant, thanks.

I recommend this product

Recovering from a ski injury I've limited bend in one knee and bought one of these used as a stop-gap. I wrapped a strip of coke can around my old 1980s Stronglight crank, and this seems to provides enough grip and protection, so the "will mark your cranks" seems thus far to be avoidable.

For my 100° bend, short legs and 170 cranks, I had to go down to 105mm on the affected side. The great thing about this device is it offers a vast range of adjustment for either leg. The obvious downside to 105mm cranks is leverage and extension, so of course a pedal swing would be a better solution as it halves the amount of crank shortening and restores some leverage and full extension - I have one on order but not a Fietsen op Maat, as I opted for one that comes with a crank shortener that self aligns in the spindle threads.

This device will do in the meantime - hey I'm back on a bike! Even tempted to add a Magic Stepper as a halfway house while waiting for a longer more versatile swing

I recommend this product

Having had two total knee replacements and not regained my full knee bend in either knee I was unable to cycle. These crank shorteners work, they can be adjusted for differences in each knee and I am now using them daily on a turbo trainer so i can regain strength. What is great, is if my knee bend improves they can be adjusted.

I recommend this product

Simple design, but an absolute godsend after weeks of trying to obtain shorter cranks, SJS advised me of this product and me and my replacement knee have not looked back. Highly and unconditionally Recommended.

I recommend this product

Have knee replacement heel only on pedal now now sole as normal on both pedals struggles gone enjoyments back

I recommend this product

Saw a different product at SJSCYCLES when I rang about was given a link to this. It's actually better than some others on market because it's infinitely adjustable.
I have used this to shorten by 47mm, the only issues I've had are cramps behind knee, found the answer was to drop my heel down at bottom of the pedal stroke just enough to stretch the back of knee.
As my knee improves I'll start to lengthen it again, one thing I've noticed is the difference on the down stroke. It's on 128mm just now, I'm considering getting another to shorten the other side to 160-165mm to see if it helps reduce fatigue on inclines.

If you see this and it interests you ring and ask for Jamie in sales as they have a different types for different cranks.

Used 3 times after 12hr shifts, works ok, couldn't use it on 175mm unless just woken & used ice. Definitely a cycling life saver for me.