18 speed or 20 speed group, what is the added cost of a 20 speed?
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  1. #1
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    18 speed or 20 speed group, what is the added cost of a 20 speed?

    I'm putting together a CX bike for my daughter, it will be used for commuting & fun rides on pavement in Chicago. I have a spare set of CX wheels that can take a 9 or 10 speed cassette, a new compact double crank and now I've found a good frame & fork.

    I'm trying to decide which to build a 18 or 20 speed. I've priced out the following;

    Shimano 105 10 speed brifters: $130
    Ultegra front derailleur: $25 to 40
    Shimano 105 rear derailleur: $50
    Shimano 105 10 speed cassette: $50

    Do I save much money can I save if I build a 18 speed instead?

    Michael

  2. #2
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    All else being equal, lower end Shimano groups (Tiagra, Sora) are cheaper and have either 8 or 9 cogs (i.e. are 16 or 18 speed), so, yeah, you would save some $$$ by going that way.

    Or you could use mtn bike components, most of which are 9 cogs (18 speeds w/a double crankset).

    BUT, if you find a great deal on 10-spd stuff, that may trump the above. Where are you finding Shimano 105 brifters for $130? That's a really good price.

    ...
    MH: I want to go like my Dad did peacefully, in his sleep, not screaming in terror like his passengers.

    Sys: COMPLACENCY IS LETHAL. VOTE in November.

    Homer: I believe that the children are our future. Unless we stop them now.

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  3. #3
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    SS pretty much covered it, but a terminology note so people won't make fun of you :-) The gearheads around here won't refer to an "18-speed" or "20-speed," even though there are theoretically that number of combinations available. That's because the "20-speed" really has at most 16 or 17 unique, useable gear combinations (maybe fewer). If you just refer to "9" or "10" people will know what you're talking about.

  4. #4
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    Quote Originally Posted by JCavilia
    SS pretty much covered it, but a terminology note so people won't make fun of you :-) The gearheads around here won't refer to an "18-speed" or "20-speed," even though there are theoretically that number of combinations available. That's because the "20-speed" really has at most 16 or 17 unique, useable gear combinations (maybe fewer). If you just refer to "9" or "10" people will know what you're talking about.
    Will do.

    I own a 1972 Schwinn Paramount Road Race. Now, that's a 10 speed by my definition.

    Michael

  5. #5
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    But, again, where does one get Shimano 105 10-spd brifters for $130?

    You sure that isn't for just one STI lever, or for the old 9-spd brifters?

    ...
    MH: I want to go like my Dad did peacefully, in his sleep, not screaming in terror like his passengers.

    Sys: COMPLACENCY IS LETHAL. VOTE in November.

    Homer: I believe that the children are our future. Unless we stop them now.

    Plat: I'd rather fellate a syphilitic goat than own a Cervelo.

    Seam: Saw Bjork poop onstage back in the day. It blew my teenage mind.


  6. #6
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    Quote Originally Posted by SystemShock
    But, again, where does one get Shimano 105 10-spd brifters for $130?

    You sure that isn't for just one STI lever, or for the old 9-spd brifters?

    ...

    These are new bike take offs. not that hard to find...

  7. #7
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    Ohh-hh, you Craigslisted it or something, got it.

    ...
    MH: I want to go like my Dad did peacefully, in his sleep, not screaming in terror like his passengers.

    Sys: COMPLACENCY IS LETHAL. VOTE in November.

    Homer: I believe that the children are our future. Unless we stop them now.

    Plat: I'd rather fellate a syphilitic goat than own a Cervelo.

    Seam: Saw Bjork poop onstage back in the day. It blew my teenage mind.


  8. #8
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    10-speeds

    Quote Originally Posted by barrettscv
    Will do.

    I own a 1972 Schwinn Paramount Road Race. Now, that's a 10 speed by my definition.

    Michael
    Sure remember those. My first derailleur bike was a 1972 Peugeot U01.

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