# Thread: I propose that 650B be called 27.2

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

WFC?

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

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3. 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. 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. I say we call it Vicky.

27.2 is a seat post size...

6. If we don't call it Juan Carlos, I'm taking my toys and going home..

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

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

8. 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.

9. Johnny "Dangerously" Charles. This is 'Merica.

10. Originally Posted by ljsmith
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.

11. 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.

mk

12. 'Mericans hate accuracy

13. Originally Posted by dirtdan
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. I propose 100010011

15. Originally Posted by Koen
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. My vote is Juan Carlos; maybe JC for short and to confuse the bashers..

17. ## 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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18. 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. Originally Posted by dirtdan
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. 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.

21. Just enjoy the ride.

22. 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. I propose you and DC get together. That way you would both have someone to appreciate your genius.

24. Originally Posted by Koen
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. Originally Posted by dbhammercycle
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.
The IT Crowd - Series 1 - Episode 2: New emergency number - YouTube

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