touring bike: 26" vs 700 vs 27" rim

the 26" rim compared to the 27" rim gives less BB clearance for curbs, dshat,
lesser armadilla-
is this not a distinct disadvantage for 26"?

On 22 Nov 2004 10:16:10 -0800, (g.daniels) wrote:

the 26" rim compared to the 27" rim gives less BB clearance for curbs, dshat,
lesser armadilla-
is this not a distinct disadvantage for 26"?

If all you did was take a frame designed for 27/700 wheels and put 26"
wheels on, yes, the BB will drop. But this isn't how it is done.
Change the BB drop in designing for a 26" wheel and you can get the BB
higher than on most 700c bikes- just check out most mountain-type 26"
bikes.

On 22 Nov 2004 10:16:10 -0800, (g.daniels) wrote:

the 26" rim compared to the 27" rim gives less BB clearance for curbs, dshat,
lesser armadilla-
is this not a distinct disadvantage for 26"?

BB height is a function of frame design; apples and oranges to try to
link it to wheel size. OTOH, if you find the characterisitics
available with 700C tires to be more desireable than those found in
the range of 26" on the market, then 700C wins...and vice versa. I've
got both. Each has its purpose, strengths and weaknesses.
--
Typoes are a feature, not a bug.
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g.daniels wrote:
the 26" rim compared to the 27" rim gives less BB clearance for curbs, dshat,
lesser armadilla-
is this not a distinct disadvantage for 26"?

if you're trying to run a 26" in a 27" frame, then yes it is a distinct
disadvantage.

i asked on the 'impression' given by print on a 27" BB clearance
advantage for cyclocross.
given the same BB clearance 27" vs 26"-in touring-does moving the body
upward on a 26" frame
reduce straight on stability?
increase or decrease frontal area
and following that, modify the body position positively or negatively?
and maybe reduce straight on hillclimbing power but increase not
needed manuverability?
geee, what to buy right? the design parameters for such a simple
mechanism where 9 grams reduction in front tube weight gives a
different feel!
like sheldon brown's raving thorm brit special-well sure now there's
an expert opinion but then how much did raving corm payum?
nice to view the belted wonder: gives an upper line here. increases
sanity

g.daniels wrote:

i asked on the 'impression' given by print on a 27" BB clearance
advantage for cyclocross.
given the same BB clearance 27" vs 26"-in touring-does moving the body
upward on a 26" frame
reduce straight on stability?
increase or decrease frontal area
and following that, modify the body position positively or negatively?
and maybe reduce straight on hillclimbing power but increase not
needed manuverability?
geee, what to buy right? the design parameters for such a simple
mechanism where 9 grams reduction in front tube weight gives a
different feel!
like sheldon brown's raving thorm brit special-well sure now there's
an expert opinion but then how much did raving corm payum?
nice to view the belted wonder: gives an upper line here. increases
sanity

Well, longer head tubes give better stability. A 26" wheeled bike will
have a longer head tube (assuming the saddle and bars are in the same
place as a 700c wheeled bike).

g.daniels wrote:
i asked on the 'impression' given by print on a 27" BB clearance
advantage for cyclocross.
given the same BB clearance 27" vs 26"-in touring-does moving the body
upward on a 26" frame
reduce straight on stability?

maybe. you'll notice more effect from different diameter tubes though.

increase or decrease frontal area
and following that, modify the body position positively or negatively?

depends on the frame. i have a della santa with "low" bb, and that's
more stable than other frames i've ridden with higher bb heights. but i
also have a miyata with a high bb & big tubes, & that thing's pretty
stable too.

and maybe reduce straight on hillclimbing power but increase not
needed manuverability?

long is less twitchy [& less maneuverable], but more flexy.

geee, what to buy right? the design parameters for such a simple
mechanism where 9 grams reduction in front tube weight gives a
different feel!
like sheldon brown's raving thorm brit special-well sure now there's
an expert opinion but then how much did raving corm payum?
nice to view the belted wonder: gives an upper line here. increases
sanity

theory in one department is negated by practice in another. just got to
suck it & see.

well, i yam 6'4' but i'll try a 26": wash the motorcycle outa my head.
the tire problem is numbing.
and you do what with your wheel program?