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  1. #1
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    I propose that 650B be called 27.2

    I posted this in another thread, but I'm annoyed with this 27.5 nonsense, so I thought I'd start my own thread.

    26" ISO: 559
    650B ISO: 584
    29" ISO: 622

    Difference between 29" and 650B = 622-584= 38
    Difference between 650B and 26" = 584 - 559 = 25
    Difference between 29" and 26" = 622 - 559 = 63
    25/63= .4
    38/63= .6
    Imperial size of 650B = 26+(.4*(29-26))=27.2
    So, if you're going to use 26 and 29 as the benchmark unit of measure, technically the new wheel size is 27.2

  2. #2
    dwt
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    I propose that 650B be called 27.2

    WFC?


    "I ride my bike to ride my bike"- Zen proverb

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  3. #3
    Hard funkinī Kraut
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    Sorry, no offense at all (!!!), but some People just care too much about a Size thatīs slightly bigger than the one we all know for Years ...

    ... and I donīt think Schwalbe, Continental or anyone else using 27.5 instead of 650B is going to reprint their Decals for 27.2

  4. #4
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    Feel free, but don't get upset when you're the only one and you have to explain your reasoning to everyone you say 27.2 to...I don't think most people really care

  5. #5
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    I say we call it Vicky.


    27.2 is a seat post size...

  6. #6
    Not dead yet, just playin
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    If we don't call it Juan Carlos, I'm taking my toys and going home..
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  7. #7
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    I propose that 650B be called 27.2

    Quote Originally Posted by ohpossum View Post
    If we don't call it Juan Carlos, I'm taking my toys and going home..
    +1. Juan Carlos FTW

  8. #8
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    I measured my tires very accurately and came up with a diameter of 27.45678352132436487459859297635374748755905745342 314263748596

    So I propose we call it 27.45678352132436487459859297635374748755905745342 314263748596

    Or Juan Carlos works too.
    2012 On One Whippet 650b
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  9. #9
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    Johnny "Dangerously" Charles. This is 'Merica.
    No fuss with the MUSS

  10. #10
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    Quote Originally Posted by ljsmith View Post
    So I propose we call it 27.45678352132436487459859297635374748755905745342 314263748596
    That is funny, is this number like pi, an endless string of non-repeating numbers? We could have a Guinness BoR entry for the guy who can recite the most in a row, and put it on a T-shirt. Sweet.
    No fuss with the MUSS

  11. #11
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    BGE or FE0. That's alpha for 275 or 650.

    I *WAS* in the 27.2 camp, but now I'm squarely Juan Carlos.

    Do it for the children.

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    trailwerkssuspension.com

  12. #12
    mtbr member
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    'Mericans hate accuracy

  13. #13
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    Quote Originally Posted by dirtdan View Post
    Difference between 29" and 650B = 622-584= 38
    Difference between 650B and 26" = 584 - 559 = 25
    Difference between 29" and 26" = 622 - 559 = 63
    25/63= .4
    38/63= .6
    Imperial size of 650B = 26+(.4*(29-26))=27.2
    So, if you're going to use 26 and 29 as the benchmark unit of measure, technically the new wheel size is 27.2
    Funny maths but all popular 650b tires measure at least 27,5" in diameter and some of them reach 28" so naming is correct.

  14. #14
    DILLIGAF
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    I propose 100010011

  15. #15
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    Quote Originally Posted by Koen View Post
    Funny maths but all popular 650b tires measure at least 27,5" in diameter and some of them reach 28" so naming is correct.
    And 29ers measure 29.2-29.5. Are those named correctly?

  16. #16
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    My vote is Juan Carlos; maybe JC for short and to confuse the bashers..
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  17. #17
    dwt
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    I propose that 650B be called 27.2

    Angry Singlespeeder is also annoyed:

    http://reviews.mtbr.com/the-angry-si...d-toilet-paper


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    Old enough to know better. And old enough not to care. Best age to be.

  18. #18
    www.derbyrims.com
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    When comparing tiny 1.8 XC race tires on each rim, yes, 26, 27.2, 28.7

    Tire sizes vary. Now that there are multiple trail bike wheel sizes, I think labeling wheel size by the rims' bead seat measurement would be most accurate and agreeable, such as is done with motorcycles.

  19. #19
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    Quote Originally Posted by dirtdan View Post
    And 29ers measure 29.2-29.5. Are those named correctly?
    The difference in rim size between 27,5" and 29" is exactly 1,5" (38mm) so you are probably talking about the same kind of tires that turn 27,5" into 28".

  20. #20
    Doesntplaywellwithmorons!
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    Or just call it 650B and go back to calling 29ers as 700C as they actually are, and the 559 size just gets called cruiser size. Its too bad the 559 bead never had a french equivalent model code.
    I don't post to generate business for myself or make like I'm better than sliced bread

  21. #21
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    Just enjoy the ride.

  22. #22
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    All I want is Juan Carlos to take dirtdan and his thread somewhere that I'm not tempted to look at it. It's a good thing that I'm fortunate enough to get paid while wasting my time reading this nonsense. Otherwise, I would feel violated.

  23. #23
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    I propose you and DC get together. That way you would both have someone to appreciate your genius.
    UGG boots will germinate Paris Hilton like intellect in your soles!

  24. #24
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    Quote Originally Posted by Koen View Post
    The difference in rim size between 27,5" and 29" is exactly 1,5" (38mm) so you are probably talking about the same kind of tires that turn 27,5" into 28".
    If this is true then the difference between the 27.5 and 26 is more like an inch meaning the difference between 26 and 29 is more like 2.5 inches and then my whole world gets completely turned upside down...

  25. #25
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    Quote Originally Posted by dbhammercycle View Post
    That is funny, is this number like pi, an endless string of non-repeating numbers? We could have a Guinness BoR entry for the guy who can recite the most in a row, and put it on a T-shirt. Sweet.
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