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Adaptive Cycling: Handcycles, Amputee Adaptation, Visual Impairment, and Other Needs Have a need for adaptive equipment to ride to compensate for a disability or loss of limb or function? This area is for discussion among those of us in the cycling world that are coming back from traumatic circumstances and tell the world, "No, you are not going to beat me down!"

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Old 01-25-15, 07:55 AM   #1
punkncat
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Want to use a specific foot/leg combo with a specific pedal

I am having an issue with heel strike with a foot leg combo I want to use. Up to this point I have been using an old leg to do my riding with. It, and others, had the foot mounted in such a way that I could turn the pylon to "toe in" my foot both avoiding heel strike as well as properly lining the shoe in the middle of the cleat float. If you've ever had a foot you can't feel come unclipped unexpectedly you know what I am talking about...
With the old legs I can ride all day without issue, but when I get off to walk more than a small distance it becomes a major comfort issue and not long after can cause injury.

My newest leg has a Rush Abilify foot The length of my residual along with the height of the foot did not allow for putting in a "pipe" above the pylon, so it's a solid piece attaching both pylons solidly. I cannot turn this foot without actually removing it from the socket itself and even then is keyed/notched. It is toed out to such a degree that not only can I not clear the crank arm, but I am past the release for the SPD. I was turned on to some aftermarket pedal extenders that will work for making the heel clear. There is not enough adjustment in the cleat to allow me to stay in the float portion, I am right on the release and any lateral movement results in unclipping.

I am looking at doing a short tour and would like not to have to carry another leg/foot combo with for space and weight. I would like to use my eggbeaters as they work well (otherwise) and release easily enough for me to get my foot out without intervention. I can't reliably keep my foot on a platform, going to be on a 'bent anyway and it's exhausting. I prefer not to use a strap pretty much for those same reasons.

It was suggested that I modify the cleat location but none of my shoes will allow for that the way they are built.

Any thoughts?
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Old 01-25-15, 09:16 PM   #2
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I had thought that pedal extenders were not compatible with Crank Brothers egg beater pedals.
I think that Egg Beater have 15-ish degrees of float, and SPD tends to have 6 degrees of float.

I use pedal extenders, and Speedplay Frog pedals. I tried SPDs, but could not reliably feel enough to clip into them. That was when my muscles were weaker, and I didn't know about the Multirelease cleat.

Do you have the 'bare' eggbeaters or the candy 'platform' eggbeaters? Is the mechanism on the platform eggbeaters mounted farther out from center?

Some people nest 2 pedal extenders together - that might bring the prosthetic foot far enough out that you're not on the release point for the pedals.
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Old 01-26-15, 10:12 AM   #3
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The extenders I was turned on to were just aftermarket dealys threaded on both ends. They are an "ebay" type thing I don't have in hand yet, and I hope no issues arise.

Problem with moving your leg out like that is that it changes q-factor and makes my knee hurt.

I am using standard egg beaters. I don't have to worry about side up alignment with a pedal I can't turn, all four sides allow me to clip in, and release is really easy.
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Old 02-01-15, 09:03 PM   #4
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Originally Posted by punkncat View Post
The extenders I was turned on to were just aftermarket dealys threaded on both ends. They are an "ebay" type thing I don't have in hand yet, and I hope no issues arise.

Problem with moving your leg out like that is that it changes q-factor and makes my knee hurt.

I am using standard egg beaters. I don't have to worry about side up alignment with a pedal I can't turn, all four sides allow me to clip in, and release is really easy.
Do you have the standard rush or the low profile one? If you have the tall one your pros might be able to get ability dynamics trade for the short one. That's what I have and it lives up to the hype and i have heard they have good customer service. Worth a shot...
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Old 02-04-15, 09:30 PM   #5
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I thought the Crank Brothers egg beater pedals installed using a 6mm wrench from the inside of the crankarm. I don't know of any pedal extenders that work with that. I almost bought egg beaters pedals to try about 5 years ago, but noticed that their website stated (under FAQ or tech support) that their pedals were not compatible with pedal extenders. So I bought Frogs instead.

I have installed a pedal extender on only the prosthetic side, and not on my sound leg before. I have never had knee pain on the prosthetic side. It's possible that my trim line on the sides is higher than yours.

One of the members of my amputee support group used to ride a recumbent trike with 2 pedal extenders on his prosthetic side to fix his heel strike problem.
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Old 02-05-15, 06:01 AM   #6
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Does this mean that you can thread them in,but can't get them back out, or can't tighten? Or won't thread at all?
Still waiting...I guess China is still making them...
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Old 02-10-15, 06:36 PM   #7
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See these links.
Kneesavers and Eggbeater pedal systems
knee savers and eggbeaters [Archive] - BentRider Online Forums WTB: Kneesaver Pedal Extenders (20mm) [Archive] - BentRider Online Forums and Eggbeaters and Kneesavers?? [Archive] - BentRider Online Forums
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Old 02-16-15, 11:52 PM   #8
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Does this mean that you can thread them in,but can't get them back out, or can't tighten? Or won't thread at all?
Still waiting...I guess China is still making them...
It means you can't get a tool on it. I suppose if you wrapped the spindle in rubber you could get it somewhat tight with a pipe wrench and precession would tighten it further. (And you'd never get the pedal off the extender.)

I wonder if a machinist could fabricate a hollow extender.
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Old 02-22-15, 11:07 AM   #9
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I wonder if a machinist could fabricate a hollow extender.
Perhaps a machine shop Lathe to Bore out an existing one . If you have a 6mm hex in the end pedal to use , a 8 mm bored hole
( or measure across the widest point add a mm, so make it That Big a hole)

would let the wrench pass thru..

I use a set of Ergon Pedals They use an 8mm hex, on the end , but that would not leave much metal if tying to reach thru an 11mm hole ..

out of say 14 mm (French pedals were 14mm, so just for point of topic keeping metric standard Whole Numbers , without the conversion factors for 9/16")
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