Bike fitting and used bikes

On Apr 29, 3:50*pm, "
wrote:
On Apr 29, 2:55*pm, Andre Jute wrote:



On Apr 29, 1:01*pm, "

wrote:
On Apr 29, 1:35*pm, Andre Jute wrote:

On Apr 29, 6:13*am, Ralph Barone wrote:

Can anybody offer up some suggestions on how much adjustment capability
is in modern road frames? *I'm looking at a few used bikes which seem to
be smaller than what I think I should be buying, but I don't have a good
feel for how bad it would be to buy an undersized frame and then just
crank up the seatpost and maybe lengthen the steerer tube.

PS: I'm 5' 10", 32" inseam, and the two bikes I was looking at were 50
cm and 54 cm frames.

Even if you could make a 50cm road bike fit without mechanical and
ergonomic problems, possibly even orthopaedic problems, you'd still
look ridiculous on it; you could end up on my cycling humour page.
Even a 54cm bike would have to be generously scaled to be a certain
adaptation. If buying a road bike by mail, with a 32in inseam I'd play
safe and stick to 56 or 58cm.

Andre Jutehttp://members.lycos.co.uk/fiultra/BICYCLE%20HUMOUR.html

A 50 might end up looking like this:

http://www.sosenka.cz/archiv/2005/m12.jpg

Joseph

Heh-heh. I don't imagine Diane will let Ralph do anything that silly.
But imagine the same bike with a stem extension to match the seat
extension. The diamond would be awfully small in relation, awfully far
away at the end of awfully long levers, and the whole thing, unless
grotesquely overbuilt for a road bike, would flop around like a sheet
of paper in a typhoon.

Is that caricature an actual bike offered for sale? In that case the
maker should learn to spell his own name right, for it is truly a Cafe
Racer!

Andre Jutehttp://members.lycos.co.uk/fiultra/BICYCLE%20%26%20CYCLING.html

That is the bike Ondrej Sosenka used to set the hour record. He is 2m
tall and the rules are very specific. Thus the extreme bike.

More pics here with rider that somehow doesn't' look ridiculous:

http://www.wolfgang-menn.de/sosenka.htm

Joseph

Thanks for the reference, Joseph. Ondrej's back isn't even flat yet!

The reference to Chris Boardman reminded me that one of the most
thrilling events I have ever seen was Boardman at the Olympics
overtaking his opponent before that poor man reached the halfway mark.
Can't remember the year or the opponent's name, only that Boardman
rode a bike designed for him by the Lotus car company. No Eddie the
Eagle jokes from my couch that day! For me that ranks right up there
with the time Frankie Chili, nearly forty years old, came from the
back of the field in the World Superbikes -- I can't even remember if
he won, or if he merely got a podium, but the ride was so fabulous
that when one of my literary protege based a scene in one of her
novels on that event I recognized her source immediately -- she
thought it another example of me reading her mind.

I reckon I could do 50 klicks in an hour, easily. Now where's the
phone number of my steady truck driver...

Andre Jute
http://members.lycos.co.uk/fiultra/B...20CYCLING.html

"Andre Jute" wrote in message
...

Boardman rode a bike designed for him by the Lotus car company.

Sort of. Mike Burrows actually did the design. The lotus people did the
building, but Mike was there all the way through.

In article invalid-81DF99.22134328042008@shawnews,
Ralph Barone wrote:

Can anybody offer up some suggestions on how much adjustment capability
is in modern road frames? I'm looking at a few used bikes which seem to
be smaller than what I think I should be buying, but I don't have a good
feel for how bad it would be to buy an undersized frame and then just
crank up the seatpost and maybe lengthen the steerer tube.

PS: I'm 5' 10", 32" inseam, and the two bikes I was looking at were 50
cm and 54 cm frames.

Both are too small. I have a 30 inch inseam and a 55 cm
frame is great. Get yourself a 58 cm frame. It will feel
very different at first but take a long test ride
with a proper saddle adjustment and modest stem.
Remember that cockpit length is critical also.

--
Michael Press

On Apr 29, 5:50*pm, Andre Jute wrote:
On Apr 29, 3:50*pm, "



wrote:
On Apr 29, 2:55*pm, Andre Jute wrote:

On Apr 29, 1:01*pm, "

wrote:
On Apr 29, 1:35*pm, Andre Jute wrote:

On Apr 29, 6:13*am, Ralph Barone wrote:

Can anybody offer up some suggestions on how much adjustment capability
is in modern road frames? *I'm looking at a few used bikes which seem to
be smaller than what I think I should be buying, but I don't have a good
feel for how bad it would be to buy an undersized frame and then just
crank up the seatpost and maybe lengthen the steerer tube.

PS: I'm 5' 10", 32" inseam, and the two bikes I was looking at were 50
cm and 54 cm frames.

Even if you could make a 50cm road bike fit without mechanical and
ergonomic problems, possibly even orthopaedic problems, you'd still
look ridiculous on it; you could end up on my cycling humour page.
Even a 54cm bike would have to be generously scaled to be a certain
adaptation. If buying a road bike by mail, with a 32in inseam I'd play
safe and stick to 56 or 58cm.

Andre Jutehttp://members.lycos.co.uk/fiultra/BICYCLE%20HUMOUR.html

A 50 might end up looking like this:

http://www.sosenka.cz/archiv/2005/m12.jpg

Joseph

Heh-heh. I don't imagine Diane will let Ralph do anything that silly.
But imagine the same bike with a stem extension to match the seat
extension. The diamond would be awfully small in relation, awfully far
away at the end of awfully long levers, and the whole thing, unless
grotesquely overbuilt for a road bike, would flop around like a sheet
of paper in a typhoon.

Is that caricature an actual bike offered for sale? In that case the
maker should learn to spell his own name right, for it is truly a Cafe
Racer!

Andre Jutehttp://members.lycos.co.uk/fiultra/BICYCLE%20%26%20CYCLING.html

That is the bike Ondrej Sosenka used to set the hour record. He is 2m
tall and the rules are very specific. Thus the extreme bike.

More pics here with rider that somehow doesn't' look ridiculous:

http://www.wolfgang-menn.de/sosenka.htm

Joseph

Thanks for the reference, Joseph. Ondrej's back isn't even flat yet!

The reference to Chris Boardman reminded me that one of the most
thrilling events I have ever seen was Boardman at the Olympics
overtaking his opponent before that poor man reached the halfway mark.
Can't remember the year or the opponent's name, only that Boardman
rode a bike designed for him by the Lotus car company. No Eddie the
Eagle jokes from my couch that day! For me that ranks right up there
with the time Frankie Chili, nearly forty years old, came from the
back of the field in the World Superbikes -- I can't even remember if
he won, or if he merely got a podium, but the ride was so fabulous
that when one of my literary protege based a scene in one of her
novels on that event I recognized her source immediately -- she
thought it another example of me reading her mind.

I reckon I could do 50 klicks in an hour, easily. Now where's the
phone number of my steady truck driver...

Andre Jutehttp://members.lycos.co.uk/fiultra/BICYCLE%20%26%20CYCLING.html

Funny how certain sporting performances stand out like that. For me,
it is Thor Hushovd winning the final stage in Paris of the 2006 TdF
(book ends by the way!). They had a camera mounted on a rail of some
sort along the finish so they could film the action up close. The
camera was zooming along next to Robbie McEwan who was kicking ass and
taking names. It was an awseome sprint and people were being punished.
Very exciting. And then McEwan does a double take with an astonished
look on his face. And the camera pans up a bit and Thor just rockets
past and stomps everyone by 4 lengths or so.

Joseph

In article ,
"Bruce Gilbert" wrote:

"Ralph Barone" wrote in message
news:invalid-81DF99.22134328042008@shawnews...
Can anybody offer up some suggestions on how much adjustment capability
is in modern road frames? I'm looking at a few used bikes which seem to
be smaller than what I think I should be buying, but I don't have a good
feel for how bad it would be to buy an undersized frame and then just
crank up the seatpost and maybe lengthen the steerer tube.

PS: I'm 5' 10", 32" inseam, and the two bikes I was looking at were 50
cm and 54 cm frames.

For a man of your size, a safe bet would be to look for a bike with about a
55cm effective top tube. That is still the best way to measure a bike. Look
for how to measure the frame for effective top tube and go from there.
Unless you have unusually long legs and a very short torso, or vice versa,
the 55cm top tube should get you reasonably close to a proper fitting frame.

The 50cm, as others have noted will be too small to work. Depending upon the
manufacturer and their respective geometry, the 54 may work well. I have
seen what were called 54cm frames go from a 53 top tube all the way to 57.
Therefore, measure the top tube and forget what size the manufacturer
describes the frame as. With the advent of compact geometry bikes, the
effective top tube measurement has become increasingly important.

I hope this helps,

Bruce

Thanks to all. No time to post more now, but I will digest and follow
up later.

Ralph Barone wrote:


Thanks to all. No time to post more now, but I will digest and follow
up later.

I rode a too small bike for several hundred miles, by jacking up the
seat to get any kind of reasonable leg distances. Besides the too small
one looking quite strange with such a long seatpost, when I finally got
a bike that was closer, I realized that the too small bike didn't feel
as stable to me. The second bike was a shade too big, but the price was
right. I had no trouble at all with it and really could be riding it
now, if I hadn't found one that was the right size and was on sale. I
am 3 inches taller than you, but have about the same leg length and ride
a 58cm frame, which is dead on for me.

On 29 Apr, 06:13, Ralph Barone wrote:
Can anybody offer up some suggestions on how much adjustment capability
is in modern road frames? *I'm looking at a few used bikes which seem to
be smaller than what I think I should be buying, but I don't have a good
feel for how bad it would be to buy an undersized frame and then just
crank up the seatpost and maybe lengthen the steerer tube.

PS: I'm 5' 10", 32" inseam, and the two bikes I was looking at were 50
cm and 54 cm frames.

Are you sure your inseam is 32"? When measuring it, you have to hold a
rluer or spirit level *firmly* under your nuts as if you're sitting on
it. Have a look at the frame size calculator I posted here a few weeks
back which gave a frame size of 56cm for someone around 5-10

In article
,
blackhead wrote:

On 29 Apr, 06:13, Ralph Barone wrote:
Can anybody offer up some suggestions on how much adjustment capability
is in modern road frames? *I'm looking at a few used bikes which seem to
be smaller than what I think I should be buying, but I don't have a good
feel for how bad it would be to buy an undersized frame and then just
crank up the seatpost and maybe lengthen the steerer tube.

PS: I'm 5' 10", 32" inseam, and the two bikes I was looking at were 50
cm and 54 cm frames.

Are you sure your inseam is 32"? When measuring it, you have to hold a
rluer or spirit level *firmly* under your nuts as if you're sitting on
it. Have a look at the frame size calculator I posted here a few weeks
back which gave a frame size of 56cm for someone around 5-10

Well, that's just a little embarrassing... I went downstairs and
remeasured, and it turns out I got both measurements wrong. 33" inseam
and 5' 9 1/2" tall. I guess that brings me a little closer to 'normal'.
I found the fit calculator link that you posted and will check it out.
Thanks.

On May 1, 5:58*am, Ralph Barone wrote:
In article
,

*blackhead wrote:
On 29 Apr, 06:13, Ralph Barone wrote:
Can anybody offer up some suggestions on how much adjustment capability
is in modern road frames? *I'm looking at a few used bikes which seem to
be smaller than what I think I should be buying, but I don't have a good
feel for how bad it would be to buy an undersized frame and then just
crank up the seatpost and maybe lengthen the steerer tube.

PS: I'm 5' 10", 32" inseam, and the two bikes I was looking at were 50
cm and 54 cm frames.

Are you sure your inseam is 32"? When measuring it, you have to hold a
rluer or spirit level *firmly* under your nuts as if you're sitting on
it. Have a look at the frame size calculator I posted here a few weeks
back which gave a frame size of 56cm for someone around 5-10

Well, that's just a little embarrassing... I went downstairs and
remeasured, and it turns out I got both measurements wrong. *33" inseam
and 5' 9 1/2" tall. *I guess that brings me a little closer to 'normal'. *
I found the fit calculator link that you posted and will check it out. *
Thanks.

Hold a not too thick hardcover coffee table book between your thighs,
opening end up, shove it up hard, stand up straight and get someone
else to measure from the upper edge of the book to the floor. If you
handle the tape yourself, you're not standing straight. The book is
good because it is obvious when something that big is not level. HTH.
-- Andre Jute

I have about the same measurements. You need a 56-58cm to fit
properly. Avoid thecompact frames with sloping toptubes as you will
have a hard time gettinga good fit. For a quick fit tip you need to
adjust the saddle so your knee is slightly bent when pedal is lowest.
If you cannot get handlebars near level with the seat you will be
spending much $$$$$ trying to get comfortable. If the bars are near
or above seat some fine tuning will allow for comfort. DO NOT BUY AN
UNDERSIZE BIKE!!! One slightly large is okay but you need a bike in
the 56cm size range.


On Apr 29, 1:13*am, Ralph Barone wrote:
Can anybody offer up some suggestions on how much adjustment capability
is in modern road frames? *I'm looking at a few used bikes which seem to
be smaller than what I think I should be buying, but I don't have a good
feel for how bad it would be to buy an undersized frame and then just
crank up the seatpost and maybe lengthen the steerer tube.

PS: I'm 5' 10", 32" inseam, and the two bikes I was looking at were 50
cm and 54 cm frames.