OCLV Frame Sizing

"Dana VanDen Heuvel" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Just a quick question about sizing and OCLV Frame.

I'm being led to believe that if you normally ride a 56cm in

most

Quoted message said:

other frames, that a 58cm OCLV is actually the proper size to

ride.

Quoted message said:

Can anyone confirm or deny that?

I'm a 5'10" rider w/a 32" inseam, and typically ride 56cm c-c

bikes.

Trek measures the OCLVs from the center of the bottom bracket to
the top of the seat collar -- and not the top (or center) of the
top tube. So yes, the OCLV may be about 2cm shorter in the same
nominal size. -- Jay Beattie.

[email hidden] (Dana VanDen Heuvel) wrote in
news:[email hidden]:

Quoted message said:

I'm being led to believe that if you normally ride a 56cm in most
other frames, that a 58cm OCLV is actually the proper size to ride.

Treks are measured to the top of the seat post collar, which is 2-3 cm bigger
than a c-c size.

In article <[email hidden]>, [email hidden]
says...

Quoted message said:

Just a quick question about sizing and OCLV Frame.
I'm being led to believe that if you normally ride a 56cm in most
other frames, that a 58cm OCLV is actually the proper size to ride.
Can anyone confirm or deny that?
I'm a 5'10" rider w/a 32" inseam, and typically ride 56cm c-c bikes.

go by top tube length.
------------
Alex

Ken said:

[email hidden] (Dana VanDen Heuvel) wrote in news:5b26d212.040512053-
[email hidden]:news:[email protected]
google.com:

Quoted message said:

I'm being led to believe that if you normally ride a 56cm in most
other frames, that a 58cm OCLV is actually the proper size to ride.

Treks are measured to the top of the seat post collar, which is 2-3 cm
bigger than a c-c size.

Yeah, but one still has to consider TT length which for a 58
oclv is 57cm.

--

[email hidden] (Dana VanDen Heuvel) wrote in message news:<[email hidden]>...

Quoted message said:

Just a quick question about sizing and OCLV Frame.

I'm being led to believe that if you normally ride a 56cm in most
other frames, that a 58cm OCLV is actually the proper size to ride.
Can anyone confirm or deny that?

Trek is one of the few frame makers using center-to-top sizing. And
since the OCLV tubes are pretty thick, you're looking at probably at
least 3/4" from the center of the top tube to the top of the tube. So
yeah, 56 = 58 (Trek) is probably about right.

James

Dana: Trek OCLV framesets are measured from the center of the bottom
bracket all the way to the top of the seat collar, which extends above the
top tube by about a cm. So, a 60cm TREK is about the same size as most
other 57cm center-to-center frames.

At 5'10", you're most likely a 58cm kind of guy (going by what we've sold in
the past, which is quite a few of them). And if it makes you feel better,
you're the same height as Lance and he rides a 58cm.

--Mike--
Chain Reaction Bicycles
www.ChainReaction.com

"Dana VanDen Heuvel" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Just a quick question about sizing and OCLV Frame.

I'm being led to believe that if you normally ride a 56cm in most
other frames, that a 58cm OCLV is actually the proper size to ride.
Can anyone confirm or deny that?

I'm a 5'10" rider w/a 32" inseam, and typically ride 56cm c-c bikes.

Thanks for your help!

- Dana -
dana[at]danavan.net

"Mike Jacoubowsky/Chain Reaction Bicycles" <[email hidden]>

Quoted message said:

Dana: Trek OCLV framesets are measured from the center of the bottom
bracket all the way to the top of the seat collar, which extends above the
top tube by about a cm. So, a 60cm TREK is about the same size as most
other 57cm center-to-center frames.

I'm curious why they'd measure them that way - it seems to be a method
of measurement that tells you nothing except perhaps the length of the
seatpost you need.

C'mon Mike - get the folks at Trek to choose one of the two other
"standards"... ;-)

Mark Hickey
Habanero Cycles
http://www.habcycles.com
Home of the $695 ti frame

I'm 5'11 with a 32" inseam and recently purchased a Trek 5200. I
started with a 56, but during the bike fitting it became clear this
was too small and my LBS obligingly swapped it for a 58 which fits me
nicely. I do believe the OCLV frames run small, at least for someone
like me in my late 50's whose body is not quite as flexible as it used
to be. I don't know if this is a result of the way they measure their
frames or the position they expect you to ride in.

Jonathan Sachs

"Mike Jacoubowsky/Chain Reaction Bicycles" <[email hidden]> wrote in message news:<[email hidden]>...

Quoted message said:

Dana: Trek OCLV framesets are measured from the center of the bottom
bracket all the way to the top of the seat collar, which extends above the
top tube by about a cm. So, a 60cm TREK is about the same size as most
other 57cm center-to-center frames.

At 5'10", you're most likely a 58cm kind of guy (going by what we've sold in
the past, which is quite a few of them). And if it makes you feel better,
you're the same height as Lance and he rides a 58cm.

--Mike--
Chain Reaction Bicycles
www.ChainReaction.com

"Dana VanDen Heuvel" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Just a quick question about sizing and OCLV Frame.

I'm being led to believe that if you normally ride a 56cm in most
other frames, that a 58cm OCLV is actually the proper size to ride.
Can anyone confirm or deny that?

I'm a 5'10" rider w/a 32" inseam, and typically ride 56cm c-c bikes.

Thanks for your help!

- Dana -
dana[at]danavan.net

dana-<< normally ride a 56cm in most
other frames, that a 58cm OCLV is actually the proper size to ride.
Can anyone confirm or deny that? >><BR><BR>

The answer is a definite maybe. Seattube length means ohhh so little. Seattube
ANGLE and top tube LENGTH is what matters. Rememeber a size '56' for one
many=ufacturer can sometimes be vastly different in another, in terms of the
two dimensions mentioned.

Also inseam means little as well, as it applies to standover. Femur length as
it applies to seat tube ANGLE is what is important.

Peter Chisholm
Vecchio's Bicicletteria
1833 Pearl St.
Boulder, CO, 80302
(303)440-3535
http://www.vecchios.com
"Ruote convenzionali costruite eccezionalmente bene"

"Qui si parla Campagnolo " <[email hidden]> wrote in message
news:[email hidden]...

<Snip > Femur length as

Quoted message said:

it applies to seat tube ANGLE is what is important. <snip>

Peter Chisholm
Vecchio's Bicicletteria
1833 Pearl St.
Boulder, CO, 80302
(303)440-3535
http://www.vecchios.com
"Ruote convenzionali costruite eccezionalmente bene"

Peter: Could you elaborate on this? How would you equate femur length to the
seat angle? Is the some sort of formua to figure it out? I have short femurs
and have a devil of a time finding something correct.

Many thanks for your numerous, very informative postings! I never have to
wonder "Hmm, I wonder what his point is"?

Dave Thompson

Dave-<< Peter: Could you elaborate on this? How would you equate femur length
to the
seat angle? >><BR><BR>

Femur length determines if it is possible to put the knee in the proper place
in terms of BB and crank. The mystyerious KOPS, small 'c' constant. Some femur
lengths, in combination with slack or steep seattubes, may not work for a
rider.

For example, really long femur, steep seattube, may not be able to get the
saddle back far enough to get KOPS.

Peter Chisholm
Vecchio's Bicicletteria
1833 Pearl St.
Boulder, CO, 80302
(303)440-3535
http://www.vecchios.com
"Ruote convenzionali costruite eccezionalmente bene"

Dave Thompson said:

"Qui si parla Campagnolo " <[email hidden]> wrote in message
news:[email hidden]...

<Snip > Femur length as

Quoted message said:

it applies to seat tube ANGLE is what is important. <snip>

Peter Chisholm
Vecchio's Bicicletteria
1833 Pearl St.
Boulder, CO, 80302
(303)440-3535
http://www.vecchios.com
"Ruote convenzionali costruite eccezionalmente bene"

Peter: Could you elaborate on this? How would you equate femur length to the
seat angle? Is the some sort of formua to figure it out? I have short femurs
and have a devil of a time finding something correct.

I think you need a steep seattube angle because it puts you more forward
with a given saddle height and saddle position. A seatpost with no
setback will also help you I think.

Quoted message said:

Many thanks for your numerous, very informative postings! I never have to
wonder "Hmm, I wonder what his point is"?

I think Peter can explain this much better than I did.

Lou

Quoted message said:

I'm curious why they'd measure them that way - it seems to be a method
of measurement that tells you nothing except perhaps the length of the
seatpost you need.

C'mon Mike - get the folks at Trek to choose one of the two other
"standards"... ;-)

Mark: If only you knew...

In my perfect world, all frames would be measured by the distance from the
center of the bottom bracket to the point where a line drawn across the top
of the top tube would intersect the center of the seat tube. Obviously, for
a sloping top tube, you'd have to have an imaginary parallel top tube that
you're measuring for.

To me, center-to-center measurements lost their relevance once we left a
world where just about all bikes had the same diameter top tube (25.4mm).

--Mike Jacoubowsky
Chain Reaction Bicycles
www.ChainReaction.com
IMBA, BikesBelong, NBDA member

I'm 5'10" with a 33" inseam and relatively long arms and I ride and
love my 56cm OCLVs. Measured traditionally, the top tube is 56cm and
the seat tube is about 54.5 (center to top of tube).

The top tube is the most important dimension for bike fit. On most
frames, the seat tube is roughly the same length as the top tube at
the 56cm size, so if you ride 56s normally, the top tube will probably
fit you on the 56cm OCLV. But that's just theory -- you should try the
56 and the 58 out.

If you kept everything else (angles, length of other tubes) constant
and lengthened the head and seat tubes 1.5 cm to make the 56cm OCLV
look more like a traditional 56cm frame, I would think the change
wouldn't affect anything except how much road shock the frame absorbs
-- the handling characteristics are dictated by wheelbase, stem
length, steering angle, and none of that would change. And when people
talk about a bike that fits, they're usually mainly talking about a
bike that has nice handling characteristics (although Bernard "the
biggest frame is the best" Hinault often meant a bike that soaked up
bumps on the road well). And again, you should ignore all of this and
ride both sizes for a while to see which feels best. Especially for
such a pricey bike.--Shayana Kadidal