I use Linkage Design software. It's a program you can draw bike frames and then analyze the geometry. You can trace a frame, put in specs from a known frame or design one of your own. The link to the site is here:  http://linkagedesign.blogspot.com/

adbl, may I use some of your pictures on the frame wiki ?
http://www.bikebuilderinfo.com/bin/view/FrameList/
I'm trying to put together structured info from forums so it's easier for new builders to find.

Will try to resurrect this old thread, just in case anyone cares to continue the discussion on the linkage and suspension of the frame.

I just decided to measure the leverage ratio on my M06 - which is the awesomest bike I have owned btw - because I still have some trimming of the rear shock to do.

When I drew it in Linkage the leverage ratio is very progressive, but that has not really been my feeling riding it. The measurements tell me that it is a completely constant leverage ratio of about 2.75. I trust the measurements (23 measurements of shock compression and wheel travel, regression line completely linear, with an R²=0.999, line through the origin), but not my linkage drawing. In Linkage I was not able to draw the little swing arm between the seat stay /rear triangle and shock, and I guess that swing arm actually bends the seat stay during compression. And that might linearize the shock - wheel travel relation.

Any thoughts on this?

What shocks are you using? I am using a Manitou McLeod, which is probably a great shock, but I have a hard time finding a single rebound setting that makes me happy on every trail. I will probably change the shim stack eventually, but decided to measure the leverage ratio to help me think about if I would be helped by a larger can on it.

I also tried to draw it in Linkage but could not finish it to spec because of the seatstay flexing instead of pivot. I'm thinking about pointing a gopro to the suspension and see how it behaves.
I also have a sussmybike that I'm waiting for years from kickstarter, that should help suspension setup.
So far on the same page, love the bike, but when I look at the bobbing while pedaling it does not seem optimal.

I started putting together the info I have:
http://www.bikebuilderinfo.com/bin/view/FrameList/
So far I added the builds that I've done.
Still missing road frames and custom titanium.

Have a look in the table if it adds value to you.

nice, we should look into creating our own buyer catalog, what do you guys think if we put a chiner wiki ?

What frame did you get ?

Did my third race on the bike. Issues with pedals hitting the ground on turns are starting to become an issue. In my last race twice I ended up unclipped on a turn due to pedal hitting rocks.
The bobbing of the frame is also becoming a bit of a pain. I'm planning on recording it with a gopro to see how much it interferes during climbs.

http://chinertown.com/index.php/topic,1180.0.html

Have you guys seen this: http://chinertown.com/index.php/topic,1180.0.html ?