Recommended size?

Discussion in 'Bikes and Buying Advice - What Bike?' started by Jandn1, 6 Mar 2018.

  1. Paul_Smith SRCC

    Paul_Smith SRCC Veteran

    Location:
    Surrey
    However it's achieved then yes "a proper bike fit" is always a plus cyberknight.

    Looking at the picture of your bike and referencing that geometry chart with a 73 degree seat tube then normally I'd expect to see the saddle further back on the rails; potentially this would be something that is at least worth further investigating. With a steep seat tube we struggle to get the rider back behind the bottom bracket, when it's further forward our 'core' is not engaged, something we call "Body mass representation" or "BMR".
    Body mass representation.jpg
    In effect when we are to far forward our core does not support us in the same way, so we actually end up having to support ourselves by holding onto the handlebars. One good way to see if 'BMR' is correct is to set your bike up on a trainer, hold the bars in your normal cycling position then simply place move your hands behind your back like that picture of Colin from Spa Cycles below, to quote Colin "Holding your position without touching the bars doesn’t require any gymnastic ability."
    BMR.jpg
    You will be amazed how many fits I've done where the drive behind having the fitting in the first place is a bad back. Often the rider has concluded that they must be over reaching, to reduce the reach the logical thing to do is move the saddle forward. They will often initially look at me in horror as I move the saddle back, a look that often morphs into a smile when it instantly feels better.

    The same can apply when the drive behind having a fitting is purely that they know they have got a good bike, it's not damaged in any way yet somehow it just doesn't feel as good or handle as good as it should do. When we are more in balance with the bike, which is what we are referencing here with 'BMR', it not only aids comfort, but how the bike responds when we are on it; win win really.
     
    Last edited: 8 Mar 2018
  2. cyberknight

    cyberknight Legendary Member

    Location:
    South Derbyshire
    I know KOPs is a myth, my current set up is 4 cm behind BB which gives me KOPs as far as i can tell.Trouble is convincing swmbo that £100 is a good price for a fit .LBS wasnt interested, club members i have asked seem to think im not far out .
    I was going to buy a la vie claire jersey for my birthday but thats been shelved as i have to take the extended family for a meal instead at my expense.
    I tend to ride arms bent on the hoods a bit like this
    terpstra-roubaix-620x412.jpg
     
    Paul_Smith SRCC likes this.
  3. vickster

    vickster Legendary Member

    For your birthday? :wacko: Tell them you don’t want to go out!
     
  4. cyberknight

    cyberknight Legendary Member

    Location:
    South Derbyshire
    Big 50 next week , booked the week off as i had planned to ride swmbo has got paint and brushes lined up.
     
    Paul_Smith SRCC likes this.
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