Frame Geometry "Comparator"

Discuss light weight issues concerning road bikes & parts.
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itsacarr
Posts: 732
Joined: Fri Nov 14, 2008 4:55 am
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by itsacarr

Has anyone come up with a more straight forward application or excel sheet for comparing two frames? I realize their is the comparator excel sheet but I find it's a bit needlessly complicated and becomes difficult to decipher. Probably doesn't help im not too mathematically inclined these days.

Would be an awfully helpful\cool tool to have something a bit more simplified and visual.

I was looking to compare the Felt FC against the Specialized Tarmac in size 54 and my head gets a bit lost when starting to look at stack and reach, drop, top tube and seat tube angles.

by Weenie


dogg
Posts: 291
Joined: Fri Jan 03, 2014 7:37 am

by dogg

it would be dead simple to make your own spreadsheet...

audiojan
Posts: 772
Joined: Fri Jan 27, 2006 1:38 pm
Location: New Hampshire

by audiojan

Easy to make a spreadsheet and compare geometry data as published, but for it to have any kind of practical use, you need to understand how those measurements were taken. Seat tube length, center-to-center, center-to-top, center-to-virtual point, virtual point-to-virtual point… same thing goes for top tube, but then you also need to take angle of seat tube and head tube in account. Head tube length, bearing-to-bearing, fork crown-to-top of top cap, etc….

In other words, just a lot of variables.
"Suddenly the thought struck me; my floor is someone elses ceiling" - Nils Ferlin


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fa63
Posts: 2253
Joined: Mon Feb 19, 2007 7:26 am
Location: Atlanta, GA, US

by fa63

Bikecad.ca

It is free, and works great. I use it frequently (and donate the developer some money from time to time because I find it a great tool).
Last edited by fa63 on Sun Apr 13, 2014 7:28 pm, edited 1 time in total.


ToffieBoi
Posts: 357
Joined: Fri Jan 31, 2014 4:54 pm

by ToffieBoi

With really really basic AutoCAD skills, you should be able to draw both frames and compare the differences.

I did that before, to decide if 54 or 56cm frame would be better for me.
I believe you can do the same.

by Weenie


BikeCAD
Posts: 1
Joined: Sun Apr 20, 2014 2:17 am

by BikeCAD

fa63 wrote:Bikecad.ca

It is free, and works great. I use it frequently (and donate the developer some money from time to time because I find it a great tool).


Thanks for the kind words and the donation. Many find the free version of BikeCAD a useful tool for comparing frame geometry. There is actually a special tool built into BikeCAD Pro that is specifically meant for this. It's called Multi-model PDF export. It's described at: bikecad.ca/multi-model_pdf

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