| Not knowing much about this, and being in the market myself.....
If the SIZE is the length of the bar from "tip" to end of the tube
where one would mt. the pad ... Then I think the following would
work.
Take your arm and place your ebow on your desk with your hand pointing
up in a position similar to holding a screw driver (this is the angle
your wrist would be in when holding the bar), then look at where the
pad should be located on your forearm.
Measure from the desk to your index finger height then subtract 2.5"
(the pad location is not @ the very end of your arm).
I come up with about 14", and I am 6' tall....
Some bars come in different widths as well....
Now how about from an expert??? Am I off base?
John_who_would_also_like_to_know
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| <<< Note 1902.0 by MAVIC::D_MOORE >>>
-< Sizing Clip-on Bars >-
The box that the new Scott clip-ons comes in has a sizing chart on the back.
You stand the box upright on a table, then rest your elbow on the table with
your forearm along the box. You make a fist with your wrist straight, not
angled in any way. Where you first knuckle hits the box indicates the size.
Not very helpful if you want to buy them mailorder.
I used the box's sizing chart to buy a pair, but they turned out to be longer
than what I wanted. It depends a lot on where you want the armrests to be
located. I don't like the Scott armrests, and use Profile for Speed armrests
with tall clamps from their clip-on bar mounted on the handlebar outside of
the aero bar. Scott armrests are designed to be mounted on the ero bar
itself, which moves them forward of the handlebar, which for me, would require
a shorter stem and a longer bar than I have settled on.
Sizing and positioning aero bars is a real pain. There are so many factors to
consider. I'm using an adjustable stem which has about 4" of fore/aft travel
to help me determine my position. I think this is an invaluable tool if you
really want to get the position right. The steps I'd follow are:
1 - Establish arm rest position. Since I put them on the handlebar, I had to
use the adjustable stem to change the handlebar's fore/aft position until I
got it right.
2 - Now figure out how long an aero bar you need. Here's where the Profile
and Mavic clip-ons are handy, since they're adjustable for length. Since I
was using the Scott's, I just tried the size that they suggested, and finding
that too long, went down a size. Good thing that worked, since I'm now using
the shortest bar they make (11").
If you're serious about finding the "right" position and are really concerned
about performance, read the article in the latest Bicycling mag about the far
forward seat position when riding aero bars. Its states that just adding aero
bars and leaving your seat position alone causes you to lose power, unless
you're willing to slide far forward on the seat to get a better position.
This is what I used to do, but my crotch really didn't appreciate it.
Instead, moving your seat 6cm forward re-establishes the proper power position
and angles for your legs. I've done basically this, and find that it seems to
work for me.
Of course, if you move your seat forward, the handlebars must go forward too,
and you may find that you can use a lower and/or longer stem due to the change
in your hip angle. Am I ever glad I've got that adjustable stem!
Good luck,
Kevin... who's probably put 20k miles on aero bars...
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