limited degree

Discussion in 'Beginners' started by leg, 28 Apr 2008.

  1. leg

    leg New Member

    Following RTA,I have been left with only 85 degree bend on my leg/knee.This prevents me from being able to ride a bike,as I cant bend sufficiently to rotate the left peddle.
    My Q is,has anyone ever,or know anyone,who has had an adjustable shaft made so as to compensate for this disability?ie a shorter shaft,leading to the peddle?
    I hope someone undrstands what iam talking about.
  2. yoyo

    yoyo Senior Member

    There is a thread on something similar to this on the CTC Forum; about 3-4 weeks ago in Does anyone Know?
  3. Fab Foodie

    Fab Foodie hanging-on in quiet desperation ...

    Hi leg, and welcome!
    I think the term you are after is "Crank" which has the pedal at one end, the right hand crank has a chainring attached and the left one does not.
    Crank arms do come in different lengths, to accomodate children, women and very tall long-legged types. Typical length for an adult is 170mm measured from the centre of the crank where it joins the axle for the bottom bracket, to the centre of the pedal axle hole. I've seen 160 mm to 175mm crank lengths as standard. What might be useful is to talk to some specialist bike makers, I found these which are made for the rear Tandems for instance, there seems to be 2 different pedal positions at 110mm and 140mm... something like that might be suitable. The company 'TA' seem to make a very wide range of cranksets for a wide variety of applications.

    Hope that helps.
  4. Hi Leg

    Wate for Mickle to get on CC as he knows where, who and how for what you need.
  5. domtyler

    domtyler Über Member

    One of our very own forum stalwarts is the man you want to talk to, RedCogs. He has a very similar story to your own I believe and also uses a funny crank thing going on. I'll see if I can find some info for you.
  6. domtyler

    domtyler Über Member

  7. Is that the Highpath Engineering one?
  8. OP

    leg New Member

    I like the pic,I will enquire locally about differant sized "cranks".
  9. domtyler

    domtyler Über Member

    His crank is actually hinged, have you read the thread in the link?

    This is the relevant post:

  10. Crackle

    Crackle Pah

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