For myself, the 650B would be a clear choice. The extra width helps in bad road 
conditions, e.g. chipseal or sand on paved road, and clearly dirt roads. The 
650 wheels seem strong. I am heavy and have not had any wheel issues in two 
years on my Bleriot. You can easily get all the tires and tubes you need on the 
internet.  The col de la vie (sp?) is a great tire, 38 mm (or so) wide and 
cheap.           Jim D.         Massachusetts

--- On Mon, 2/8/10, PATRICK MOORE <[email protected]> wrote:


From: PATRICK MOORE <[email protected]>
Subject: Re: [RBW] Choosing between a 650B and 700c frame
To: [email protected]
Date: Monday, February 8, 2010, 12:16 PM


There are two advantages of 650B, as far as I can tell. One is that it lets you 
run a fatter tire of the same diameter of a thinner 700c tire. If you don't 
need fatter tires, then go with 700c. 

The second is that it lets you use a smaller wheel, assuming you don't increase 
it to 700c size by said fatter tires, which may be a good choice for some 
smaller people who need smaller frames, or simply for weirdos like me who like 
smaller wheels in larger frames (tho' I go all the way down to the 559 and 571 
sizes). 

Note too that some of the advantage of fatter, 650b tires is gained by skinnier 
700c tires simply because they are 1 1/2 inch bigger in diameter -- all things 
equal, larger diameters roll more easily (said one who knows by (a) his 29er 
compared to his 26ers, annd (2) because he has favored 559 sized road wheels.)

And, fwiw, I have read that increasing the *diameter* a certain % reduces 
rolling resistance by some multiple of the reduction brought about by merely 
increasing the tire width by that same % -- studies done by the British 
government back in the later 18th century to help carriage makers design wheels 
that would travel better on their new, McAdamized and Telford-ized gravel roads.


On Sun, Feb 7, 2010 at 9:51 PM, Zaelia <[email protected]> wrote:

Hello - I'm a new member to the group, and I'm in the process of
ordering an A. Homer Hilsen frame from Rivendell. I've been given the
option of both the 650B frame (56cm) and the 700c frame (55cm).  After
conducting as much research as I can online and talking with my bike
knowledgeable friends, I'm still finding the decision to be
difficult.  I'm not sure how much information I should give here, but
I'm just wondering if anyone has any thoughts about my dilemma.

My AHH will be primarily a commuter bike, but will also serve me on
longer weekend rides and perhaps some light touring in the future.
What I like about this bike is its ability to tackle a wider range of
conditions - road and off-road (nothing gnarly,  mind you) - and it is
just a beautiful looking bike!  In my adult life, I've only ever known
my current ride - a Rocky Mountain Fusion mountain bike from the
mid-90s.  I'm looking forward to riding a bike much more suited to my
style of riding.  The Fusion makes me work pretty hard and it's h-e-a-
v-y!

Availability of the 650B wheels is my biggest issue.  I have only
found two stores locally that can help me out with this (they don't
have anything in stock but would have to order), though I've not
conducted an exhaustive search.  Talking with the folks at the local
stores was quite illuminating.  The first kept telling me that the
tire was a new fad - something for the folks who want to be
different.  The second had no idea what I was talking about.  I'm not
all that mechanically inclined, so I depend on my LBS (to my chagrin)
- though I hope to change this in the future and become more adept at
working on my bike.

I'm leaning heavily toward the 650B because of the many things I've
read about it on sites like 650B Palace (http://
650bpalace.blogspot.com/) and La Confrérie des 650 (http://www.cyclos-
cyclotes.org/650/index_ang.html).  Even the Country Bike Shop (http://
www.countrybikeshop.com/) makes me feel the 650B is the choice I
should make.  But still a lingering doubt remains.  I can't imagine
I'll regret my decision, but I worry that I might.

While I have you - the second part of this question might be what
width should I get?  And what brands/models do you recommend?  I know
much of this is subjective, but I'd be happy to read your thoughts.
Thanks.

Cheers,
Zaelia

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-- 
Patrick Moore
Albuquerque, NM
For professional resumes, contact
Patrick Moore, ACRW at [email protected]
(505) 227-0523




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