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Old 03-13-2019, 07:28 PM
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pdmtong pdmtong is offline
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Easily estimating reach and drop with various stems / spacers

I was trying to figure out the resultant reach (tip saddle to center bar) and drop when using various stems with different rises and lengths.

we call know this calculator
http://yojimg.net/bike/web_tools/stem.php

BUT it only shows the incremental reach/drop relative to the current stem not from the tip of saddle.

I had an epiphany.

Tape together length-wise 2-3 sheets of standard 8.5 x 11 paper

Mark the right edge somewhere and from that point, use a carpenters square or long straight edge to draw a right triangle with your bar drop vertically along the right edge, and the hypotenuse as the tip of saddle to bar reach of your current position.

Now you have a point on a paper from which to plot the relative positional outputs from
http://yojimg.net/bike/web_tools/stem.php

and once those outputs are plotted, you can now measure the tip of saddle to bar reach.

Graph paper would make it easier, but really all you need is pencil, paper, adhesive tape, square/long straight edge, metric measuring ruler/tape

This is almost as good as backing the bike to a wall (instead of using a plumb bob) to measure setback
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Old 03-13-2019, 07:39 PM
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donevwil donevwil is offline
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I just create one of these for each of my bikes.

Untitled.jpg

Last edited by donevwil; 03-13-2019 at 08:30 PM.
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Old 03-13-2019, 09:02 PM
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pdmtong pdmtong is offline
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I tried the free BikeCAD but I couldn't get it to work and the pencil/paper method, so old school, was quick and close enough.
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Old 03-13-2019, 10:11 PM
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Quote:
Originally Posted by pdmtong View Post
I tried the free BikeCAD but I couldn't get it to work and the pencil/paper method, so old school, was quick and close enough.
Just pulling your leg. I spend so many hours a week on SolidWorks that I use it for everything, house remodels, bike geo, furniture relocation. Your simple solution is great, even better than mine when you consider I don't have a computer in my bike room. raisin' a 'Younger to you.

I didn't find the free BikeCAD useful at all.
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Old 03-13-2019, 10:48 PM
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Easily estimating reach and drop with various stems / spacers

Pelotas busted

I had PtY twice at RRB Windsor this past February

Delicious
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