www.bikecad.ca - saddle reference point
https://www.bikecad.ca/taxonomy/term/47
enSaddle (Positioning by height and seat angle, or by X and Y coordinates)
https://www.bikecad.ca/saddle_position
<div class="field field-name-body field-type-text-with-summary field-label-hidden"><div class="field-items"><div class="field-item even"><div class="video-container"><iframe frameborder="0" src="//www.youtube.com/embed/6udRlsrVj8w?rel=0" width="800" height="480"></iframe></div><p>In the past, the saddle position in BikeCAD was largely controlled by the <a title="Seat angle" href="http://www.bikecad.ca/seat_angle">seat angle</a> and the <a title="Saddle height" href="http://www.bikecad.ca/saddle_height">saddle height</a>. Once these values were established, we could further adjust the saddle position by changing the seatpost setback and the position of the saddle clamp on the rails.</p><p>In BikeCAD <a title="BikeCAD Version 10.5" href="http://www.bikecad.ca/version_10">version 10.5</a>, we now have two additional options. We can directly enter values for saddle position relative to the bottom bracket in X and Y coordinates. When we choose this option, the saddle height is automatically established because it is simply the hypotenuse side of the triangle formed by the X and Y coordinates. Because we also allow for the input of saddle dimensions and seatpost setback, the seat angle, just like the saddle height, is determined automatically.</p><p>Entering the saddle position in X and Y coordinates is useful when replicating measurements taken off a fit bike or through bicycle measuring devices such as those used in the Specialized BG Fit system. With the X and Y measurements shown on the screen, you can see where on the saddle these measurements are being taken. If you would like to reference a different point on the saddle, you can shift the reference location using the <a title="Saddle reference point" href="http://www.bikecad.ca/saddle_reference_point">Saddle reference point</a> X and Y input fields.</p><p>Even if you are still used to thinking more in terms of saddle height and seat angle, it can still be useful to use the Saddle X and Y method. For example, if we've designed a bike such as this with a 74 degree seat angle and a saddle height of 700mm, we may like this geometry. But what if we want to apply a curved seat tube? As we add the curve to our seat tube, our saddle will move back as BikeCAD maintains our specified seat angle. (Just as an aside, not everyone might agree on how to measure seat angle when you're dealing with a curved seat tube. But in BikeCAD, we take the seat angle as the angle of our seat post. In cases where we have a curved seat tube it is often more meaningful to speak in terms of <a title="Effective seat tube angle" href="http://www.bikecad.ca/effective_seat_tube_angle">effective seat tube angle</a> and we can show this dimension as well in BikeCAD Pro.) Going back to our example, if we back up and switch to the Saddle X and Y option before adding the curve to our seat tube, BikeCAD will leave the saddle in the same position and calculate the required seat angle to suit the curved seat tube. If we make further revisions to our model through changing the position of the saddle clamp on the rails, or by changing the seatpost setback, we'll notice that BikeCAD will automatically adjust the seat angle to maintain the specified saddle position.</p><p>In addition to the saddle X and Y method, we can also specify the position of the saddle clamp in X and Y coordinates. This option is available because while some fit bikes are largely concerned with the X and Y position of the top of the saddle, other fit bikes focus on the X and Y coordinates of the saddle clamp.</p><p>The Saddle clamp X and Y method is similar to the Saddle X and Y method in that it will automatically adjust the seat angle as the saddle clamp is shifted or as the seatpost setback is changed. However, shifting the saddle fore and aft on the rails will not impact the geometry of the frame.</p><p>One more note about the saddle height input field: When the saddle height method is chosen in the Primary dimensions dialog box, that same input field is also available in the Saddle dialog box. If you change the saddle height in one dialog box, it will also change in the other. If you choose the saddle X and Y option, or the Saddle clamp X and Y option, the Saddle height input field in the Saddle dialog box will be replaced by a button. When you click this button, the Primary dimensions dialog box will appear allowing you to control the saddle in any of the three methods already discussed.</p></div></div></div><div class="field field-name-field-tags field-type-taxonomy-term-reference field-label-hidden"><div class="field-items"><div class="field-item even"><a href="/taxonomy/term/363">Saddle</a></div><div class="field-item odd"><a href="/taxonomy/term/129">Seat angle</a></div><div class="field-item even"><a href="/taxonomy/term/47">saddle reference point</a></div></div></div>Sat, 18 Jan 2014 18:35:54 +0000bcurry29532 at https://www.bikecad.cahttps://www.bikecad.ca/saddle_position#commentsSaddle to Pedal Dimensions (Showing)
https://www.bikecad.ca/saddle_to_pedal
<div class="field field-name-body field-type-text-with-summary field-label-hidden"><div class="field-items"><div class="field-item even"><div class="video-container"><iframe frameborder="0" src="https://www.youtube.com/embed/xW0REJcKIWQ" width="800" height="480"></iframe></div><p>A couple of new dimensions added to BikeCAD Pro version 9.15 include the saddle to drive side pedal dimension and the saddle to non-drive side pedal dimension.</p><p>If we animate this model we can see how these measurements will change as the cranks rotate.</p><p>If we pull up the drivetrain dialog box <img class="blackborder" title="Drivetrain" src="https://www.bikecad.ca/faqFiles/DRIVETRAIN.png" alt="Drivetrain" width="28" height="24" />, we can move the cranks into any specific orientation we like.</p><p>By default, the reference point on the saddle is the lowest point on the top surface of the saddle. However, as with all measurements taken from the saddle, we can shift this point left or right and up and down using the <a title="Saddle reference point" href="https://www.bikecad.ca/saddle_reference_point">saddle reference point dimensions</a> in the Saddle dialog box <img class="blackborder" title="Saddle" src="https://www.bikecad.ca/faqFiles/SADDLE.png" alt="Saddle" width="25" height="24" />.</p></div></div></div><div class="field field-name-field-tags field-type-taxonomy-term-reference field-label-hidden"><div class="field-items"><div class="field-item even"><a href="/taxonomy/term/174">bicycle dimensions</a></div><div class="field-item odd"><a href="/taxonomy/term/323">saddle to pedal</a></div><div class="field-item even"><a href="/taxonomy/term/47">saddle reference point</a></div></div></div>Sun, 27 Jan 2013 21:28:18 +0000bcurry16663 at https://www.bikecad.cahttps://www.bikecad.ca/saddle_to_pedal#commentsHandlebar Drop
https://www.bikecad.ca/handlebar_drop
<div class="field field-name-body field-type-text-with-summary field-label-hidden"><div class="field-items"><div class="field-item even"><img src="https://www.bikecad.ca/faqFiles/handlebar_drop.png" width="800" height="466" ALT="Handlebar drop" TITLE="Handlebar drop" />
<p><em>Handlebar drop</em> by default is the vertical distance from the center of the saddle to the center of the handlebar. However, this measurement does not necessarily have to start at the center of the saddle. The location on the saddle can be changed by altering the <em><a href="https://www.bikecad.ca/saddle_reference_point">saddle reference point</a></em>.</p>
<p>There is also a variation on this dimension that goes to the top surface of the handlebar rather than the center of the handlebar.</p>
</div></div></div><div class="field field-name-field-tags field-type-taxonomy-term-reference field-label-hidden"><div class="field-items"><div class="field-item even"><a href="/taxonomy/term/66">handlebar drop</a></div><div class="field-item odd"><a href="/taxonomy/term/47">saddle reference point</a></div><div class="field-item even"><a href="/taxonomy/term/25">bicycle frame dimensions</a></div></div></div>Wed, 17 Aug 2011 18:24:17 +0000bcurry125 at https://www.bikecad.cahttps://www.bikecad.ca/handlebar_drop#commentsSaddle Height
https://www.bikecad.ca/saddle_height
<div class="field field-name-body field-type-text-with-summary field-label-hidden"><div class="field-items"><div class="field-item even"><img src="https://www.bikecad.ca/faqFiles/saddle_height.png" width="800" height="466" ALT="Saddle height" TITLE="Saddle height" />
<p>BikeCAD defines saddle height as the direct distance from the center of the bottom bracket to the reference point on the saddle. The reference point is by default the deepest part of the saddle, where it may dip down in the middle. However, this point can be changed according to the instructions <em><a href="saddle_reference_point">here</a></em>.</p>
<p>This dimension will tend to be roughly parallel to the seat tube, but it will not always be exactly parallel. As the saddle is slid back and forth on its rails, the saddle height dimension will shift to follow the saddle. The saddle height dimension will also shift as the seatpost setback is changed.</p>
<p>As the fore and aft position of the saddle is changed, and as the seatpost setback is changed, BikeCAD will adjust the length of exposed seatpost so that the actual saddle height will remain as specified.</p>
<p>Saddle height can be directly input into BikeCAD. Alternatively, the saddle can be located by XY coordinates with respect to the bottom bracket. This is explained at: <a href="https://bikecad.ca/saddle_position">bikecad.ca/saddle_position</a>.</p>
</div></div></div><div class="field field-name-field-tags field-type-taxonomy-term-reference field-label-hidden"><div class="field-items"><div class="field-item even"><a href="/taxonomy/term/48">saddle height</a></div><div class="field-item odd"><a href="/taxonomy/term/47">saddle reference point</a></div><div class="field-item even"><a href="/taxonomy/term/25">bicycle frame dimensions</a></div></div></div>Tue, 16 Aug 2011 20:25:24 +0000bcurry113 at https://www.bikecad.cahttps://www.bikecad.ca/saddle_height#commentsSaddle Reference Point
https://www.bikecad.ca/saddle_reference_point
<div class="field field-name-body field-type-text-with-summary field-label-hidden"><div class="field-items"><div class="field-item even"><p>There are several dimensions that reference the saddle. Examples include <a href="http://www.bikecad.ca/saddle_height">saddle height</a>, saddle height off ground, saddle from BB, <a href="http://www.bikecad.ca/rider_compartment">rider compartment</a>, <a href="http://www.bikecad.ca/effective_seat_tube_angle">effective seat tube angle</a> and <a href="http://www.bikecad.ca/handlebar_drop">handlebar drop</a>. It is possible to change the reference point on the saddle from where these measurements are taken. The video below demonstrates the process.</p>
<div class="video-container"><iframe width="800" height="480" src="https://www.youtube.com/embed/fcBaqc2xNPQ" frameborder="0" allowfullscreen></iframe></div></div></div></div><div class="field field-name-field-tags field-type-taxonomy-term-reference field-label-hidden"><div class="field-items"><div class="field-item even"><a href="/taxonomy/term/47">saddle reference point</a></div><div class="field-item odd"><a href="/taxonomy/term/48">saddle height</a></div><div class="field-item even"><a href="/taxonomy/term/49">saddle position</a></div><div class="field-item odd"><a href="/taxonomy/term/25">bicycle frame dimensions</a></div></div></div>Tue, 16 Aug 2011 20:05:25 +0000bcurry112 at https://www.bikecad.cahttps://www.bikecad.ca/saddle_reference_point#comments