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Bicycle Gears?

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rafhelp
rafhelp Posts: 365 Forumite
Part of the Furniture 100 Posts Name Dropper Combo Breaker
OK a bike has 21 gears.

The front "GEAR A" has three cogs, small, medium and large

THe rear "GEAR B" has 7 cogs.

Now how these work. If you go up hill its hard to pedal so you have to change gear, but what is the general rules for the gear changing.

Do most people use gears or do you tend to just peddle on the same gear.
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  • Mankysteve
    Mankysteve Posts: 4,257 Forumite
    Part of the Furniture 1,000 Posts Combo Breaker
    Try to maintain a steady pedalling RPM speed and adjust the gears when you can't maintain they rate change gear.
  • andy8442
    andy8442 Posts: 200 Forumite
    Part of the Furniture 100 Posts Combo Breaker
    Are you serious? Have you never ridden a bike?
  • andy8442 wrote: »
    Are you serious? Have you never ridden a bike?

    its quite a serious question, i have no idea myself, change gears and there is an almight bang sometimes. recently got a new bike, but the ones we had when we were kids only had 3 gears and not the new ones with 21 and on two handles. Never know which one to turn :)
  • rev_henry
    rev_henry Posts: 4,965 Forumite
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    Mankysteve wrote: »
    Try to maintain a steady pedalling RPM speed and adjust the gears when you can't maintain they rate change gear.
    This.

    When commuting in the city, where my journey is pretty flat, I rarely change gear on 'gear A', just leaving it in the middle one, and use 'gear b' only. That was until some idiot nicked my bike. My new one has 7 speed hub gears, so is a bit different...
  • tanith
    tanith Posts: 8,091 Forumite
    Part of the Furniture Combo Breaker
    its quite a serious question, i have no idea myself, change gears and there is an almight bang sometimes. recently got a new bike, but the ones we had when we were kids only had 3 gears and not the new ones with 21 and on two handles. Never know which one to turn :)

    I think you are meant to stop pedalling just for a sec as you change gear , makes for a smoother change...
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  • rev_henry wrote: »
    This.

    When commuting in the city, where my journey is pretty flat, I rarely change gear on 'gear A', just leaving it in the middle one, and use 'gear b' only. That was until some idiot nicked my bike. My new one has 7 speed hub gears, so is a bit different...

    I have an 8 speed hub, wouldnt go back! No gear overlap no crunching and dodgy changes and best of all no maintainance!
  • rev_henry
    rev_henry Posts: 4,965 Forumite
    Part of the Furniture 1,000 Posts Combo Breaker
    tanith wrote: »
    I think you are meant to stop pedalling just for a sec as you change gear , makes for a smoother change...
    What? Unless it has hub gears you NEED to keep pedaling otherwise it won't change. Unless you mean stop pedaling properly and just pedaling slowly so that you're not actually pushing the wheels round for that second, if that makes sense. In which case that's quite a good idea.
  • rev_henry
    rev_henry Posts: 4,965 Forumite
    Part of the Furniture 1,000 Posts Combo Breaker
    I have an 8 speed hub, wouldnt go back! No gear overlap no crunching and dodgy changes and best of all no maintainance!
    I'm still getting used to it but I'm loving it so far. That and its just generally a better bike than my old one. Incidentally the guy I bought it off was selling to upgrade to something with an 8 speed hub.
  • freakybacon
    freakybacon Posts: 1,143 Forumite
    tanith wrote: »
    I think you are meant to stop pedalling just for a sec as you change gear , makes for a smoother change...

    Nope! You need to keep pedalling to move the chain over the front chainwheels and rear cassette- or front and back cogs. The bigger the gearwheel on the cranks- the harder it will be to pedal-as it will be th smaller the cog on the back! Harder to pedal- for downhill/flat, easier to pedal- uphill!
    "In times of universal deceit, telling the truth will be a revolutionary act. "

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  • Derivative
    Derivative Posts: 1,698 Forumite
    edited 23 April 2011 at 11:42PM
    You want to be pedalling fairly fast, it seems unnatural at first.

    The faster your cadence the more efficient, generally (don't go silly and bounce around on the seat).

    The optimal cadence is just below that at which it feels like you're just spinning the pedals and not getting anywhere. So when you get to that point, switch up. You want to be pedaling at LEAST 60rpm, 80+ is better.

    Low cadence = more tiring, also increases the risk of eventual knee injury.

    The trick is getting over the feeling that you're pedalling quickly and not getting anywhere.

    On hills, switch down before you get to the hill - don't try and burst up it, you'll get tired halfway and then the last part is much harder. You should be able to find a low enough gear such that it's not too much harder than pedalling on the flat, unless we're talking 30% gradients and so on.

    I switch gears all the time, probably at least once a minute. It should never feel "hard" to pedal - you switch down before that happens. The limit should be how fast you can spin your legs as opposed to how hard you can push down.

    It's not a daft question - look at most people on the street and they'll be doing it wrong.
    Said Aristippus, “If you would learn to be subservient to the king you would not have to live on lentils.”
    Said Diogenes, “Learn to live on lentils and you will not have to be subservient to the king.”[FONT=Verdana, Arial, Helvetica][/FONT]
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