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PostPosted: Wed Jan 30, 2013 2:23 pm 
Old School Grand Master
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Joined: Fri Oct 14, 2011 8:41 pm
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Location: Cumbria
Block of wood bolted to the pedals as a starter.........it's what we did as kids to ride a proper bile :)

Shaun


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PostPosted: Thu Jan 31, 2013 7:45 pm 
Old School Grand Master
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Location: London for my sin's
Midlife wrote:
Block of wood bolted to the pedals as a starter.........it's what we did as kids to ride a proper bile :)

Shaun



indeed

as his le is shoter a shorter crank will make it worse (imho) in the 12 o'clock position as it will be lower down - meaning the rider will have to lean over to reach it.

Spd's are wonder and i cant ride a bike without them (afyter loosing about half my right leg via acreless driver when i was 16) I would say that a specialist pair of shoes to compensate for the shorter length and spds would be better on (and off the bike)


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PostPosted: Thu Jan 31, 2013 7:56 pm 
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Location: It's not easy being a dolphin.
...or leave the bike well alone and look into modifying a shoe with some sort of platform.


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PostPosted: Thu Jan 31, 2013 8:55 pm 
Gold Trader
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Location: New Forest
Thanks for all the comments guys.

His right knee is quite weak - he reckons he'd prefer to bend it less if possible; a pedal block/tall shoe is just going to make that worse.

I spoke to him about SPDs (well, one, on the NDS) today, and he was actually very receptive to the idea. He said that when he's tried exercise bikes, his short leg doesn't really do anything other than go round, so he's just looking at getting it comfortable, not using it for power.

So.... Anyone got an old SPD shoe for him to try? left foot, size 10/11? :facepalm:


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PostPosted: Thu Jan 31, 2013 9:03 pm 
eBay Outing Master
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Wasn't there recently in here a mountain bike where the pedals simply went up and down rather than in the conventional way?


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PostPosted: Thu Jan 31, 2013 9:12 pm 
aka Leo Swayer
aka Leo Swayer
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Location: Wales.UK
The chap who is reworking my road frame for me has recently made a complete bike for a gent who has a leg that is very much weaker(and as a result shorter i think) than his other leg.
The gent in question markets, i believe, hinged crank arms and shortened cranksets.
I can get some proper details and pics when i go to pick the frame up next week if you like?


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PostPosted: Thu Jan 31, 2013 9:23 pm 
Gold Trader
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Location: New Forest
Grannygrinder wrote:
The chap who is reworking my road frame for me has recently made a complete bike for a gent who has a leg that is very much weaker(and as a result shorter i think) than his other leg.
The gent in question markets, i believe, hinged crank arms and shortened cranksets.
I can get some proper details and pics when i go to pick the frame up next week if you like?


That, Sir, would be mighty fine of you. :D


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PostPosted: Thu Jan 31, 2013 9:24 pm 
Old School Grand Master
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Location: Herts UK
a paltofrm shoe on the shorter leg or easier a built up pedal instead of crank length. not sure that SPD for the weaker leg is a good idea as it will be harder to unclip.


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PostPosted: Thu Jan 31, 2013 9:30 pm 
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02gf74 wrote:
a paltofrm shoe on the shorter leg or easier a built up pedal instead of crank length. not sure that SPD for the weaker leg is a good idea as it will be harder to unclip.


SPD would only be for the good leg.

Platform shoe would actually increase the movement in his knee, so he wants to avoid it if possible.


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PostPosted: Thu Jan 31, 2013 9:50 pm 
Retro Guru
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Location: It's not easy being a dolphin.
"His right knee is quite weak - he reckons he'd prefer to bend it less if possible; a pedal block/tall shoe is just going to make that worse."

A pedal block / tall shoe would compensate for a shorter leg, and a shorter crank would compensate for less bending - so isn't the answer a bit of both through experimentation with a bike on a Turbo trainer at home? Just a practical suggestion that may reach a "sweet spot".

Otherwise, it may sound silly but another bottom bracket welded further up the seat-post and some sort of timing chain similar to say a tandam set-up? Probably a bit too exotic initially until more research is done. EDIT: Or two eccentric BB shells to offer more adjustment?


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