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  1. #1
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    What would it take to convert 7 speed to 8 or 9 speed?

    the girlfriend has a Lana'i (i tried to get her to buy something else last year, but she liked the colors)

    she can't keep up with me on my Kikapu so it slows us both down on rides.

    i think she needs a new hub/cassette/shifter and derailer; am i correct?

    she doesn't need XT components, more basic would be fine.

    what do i need to do to be able to convert this?
    2003 Kona Kikapu

  2. #2
    Shortcutting Hikabiker
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    to go from 7 to 8 you might be able to stick with the same derailleur but you'll at least need a new cassette and rear shifter, you might be able to get away with the same chain and other stuff. To go 9 you would need a new chain, cassette, rear derailleur, rear shifter, you might also need a new crank and front derailleur to get it to work good with the narrower 9 speed chain. No real point to go from 7 to 8, 7 to 9 will be more expensive. Tell her to pedal faster.

  3. #3
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    Haha, pedal faster!

    i went out today by myself and there would be no way could have kept up with me today

    can i change out individual cogs for smaller ones?
    2003 Kona Kikapu

  4. #4
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    It's not the gearing. Eight and 9 speed setups do not really have a higher or lower gear. The steps in the middle are just closer together.

    A rider's speed on a bike is rarely because of the gearing. Acme is right. You need to work on the motor.
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  5. #5
    Shortcutting Hikabiker
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    Quote Originally Posted by shiggy
    It's not the gearing. Eight and 9 speed setups do not really have a higher or lower gear. The steps in the middle are just closer together.

    A rider's speed on a bike is rarely because of the gearing. Acme is right. You need to work on the motor.
    Exactly, the only thing you might gain is a lower low gear than what she has, but what does that matter?

  6. #6
    Live 2 Ride
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    I would like to point out something that Acme54321 neglected to tell you.

    When upgrading from 7 speed to 8 or 9 you need a different rear hub. 7 speed read hubs are not compatible with 8 or 9 speed casettes.
    My Bike: '96 Gary Fisher Aquila
    My Blog: http://http://kona0197.wordpress.com/

  7. #7
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    Quote Originally Posted by Kona0197
    I would like to point out something that Acme54321 neglected to tell you.

    When upgrading from 7 speed to 8 or 9 you need a different rear hub. 7 speed read hubs are not compatible with 8 or 9 speed casettes.
    i had that in my original post...

    i just looked at my Kik compared to hers, i do have 2 smaller gears than she does, so can we swap those, or can i just fine a 7 speed with different gearing??
    2003 Kona Kikapu

  8. #8
    Nouveau Retrogrouch SuperModerator
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    Quote Originally Posted by brschmid
    ...i just looked at my Kik compared to hers, i do have 2 smaller gears than she does, so can we swap those, or can i just fine a 7 speed with different gearing??
    I will bet her bike also has bigger chainrings than yours. End result, same gearing.

    Even if you do put higher gearing on your GF's bike she still has to be able to pedal it.
    The earlier "pedal faster" comments are not a joke!
    The only place taller gears really help you go faster are on steep downhills.
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  9. #9
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    actually, my biggest one is 44, hers is 42. so my bike all around has better gearing since it was designed as a racing bike.
    2003 Kona Kikapu

  10. #10
    Nouveau Retrogrouch SuperModerator
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    Quote Originally Posted by brschmid
    actually, my biggest one is 44, hers is 42. so my bike all around has better gearing since it was designed as a racing bike.
    So, you are trying to tell us your GF is spinning out a 42 x 13 or 14? AND you are riding faster?

    42 x 13 @ 100 rpm = 25 mph
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  11. #11
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    Quote Originally Posted by shiggy
    So, you are trying to tell us your GF is spinning out a 42 x 13 or 14? AND you are riding faster?

    42 x 13 @ 100 rpm = 25 mph
    pretty sure she is not doing 100rpm, i can but she cant

    btw, how did you do that formula? I am running either 44x14 or 44x12 when i get going
    2003 Kona Kikapu

  12. #12
    Nouveau Retrogrouch SuperModerator
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    Quote Originally Posted by brschmid
    pretty sure she is not doing 100rpm, i can but she cant
    Are you at least starting to get the point, though? 80-100 rpm is a normal pedal speed. I top out at around 180.
    btw, how did you do that formula? I am running either 44x14 or 44x12 when i get going
    You can download a Excel Gear/Speed Calculator on my tire site http://mtbtires.com/tech
    mtbtires.com
    The trouble with common sense is it is no longer common

  13. #13
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    thanks guys, i will try to push her harder (it will only benefit her in the end)
    2003 Kona Kikapu

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