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"ideal" xc fs frame

683 views 1 reply 2 participants last post by  Ronnie 
#1 ·
I am currently working on a project - designing a new full-suspension frame for xc racing, but I’ve come to a point where I really could need some help.

I’ve come up with the following points that make a good xc fs frame:
• No bob during pedaling.
• Lightweight – the frame should weigh less than 2500 g (including shock)
• No change in chain length throughout the travel (no kickback)
• Linear shock movement (because of air shocks)
• 80-100 mm on rear wheel travel
• Adjustability
• Sensitivity
• Steep head and seat angles
• Lateral and torsional rigidity.
• Possibility to use conventional bottle cages
• Possibility to use both front derailleur types: top- and down-pull

So before I start designing my own frame I am comparing some of the most popular frames available at the moment (using linkage and other programs). But I’ve come to a problem:
- how to measure bob?
- how to measure kickback?
NB! For the base I have all the data linkage gives.

Any help is appreciated!
 
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