Link Suspension Forks Info Wanted

[RWP]

I am looking for linking "springer type but not your typical cruiser springer" forks for my next frame project.
I know I have seen pics here on ES - hoping some kind soul can point me in the right direction.

The forks I am looking for are no longer being manufactured.
Sorta triple clamp affairs.
They have 4 links - 2 on each side and 2 above the head tube and 2 below the head tube.
There is a mono shock from the outer bottom to the inner top.

As I remember the forks that support the wheel are ridged and all the suspension happens in the parallelogram links.

A name would be great and links to pictures if possible.

Thanks!!!

[MattyCiii]

Google "girder fork"

[aroundqube]

Sounds like the discontinued Girven mountain bike fork. Some had a spring in the middle,others used elastomers.They pop up on ebay. Oh,the dropouts look backwards too.

[AussieJester]

As above, it is the girder design, I been after the carbon fine
Model manufactured by Girvin, everytime I have seen on Ebay, I've never had the cash to buy them, nice looking fork
Anyway, good luck scoring one oh, spare parts I believe are still
Available for these forks new

[RWP]

Thanks guys!
It's the Girvin/Proflex girder fork I am looking for.

[Miles]

If you want something that's current:
http://www.german-a.de/en/kilo.html

[Jamzz]

I trash picked up a K2 Proflex that was just lying in the street. The fork is missing a few pieces. It's your for the price of shipping.

[Trackman417]

What is the advantage of these forks over using a double or even a singe crown fork?
From my untrained eye, they look like fork gimmicks.
Sorry for the thread jack, say the word and I will delete this post

[RWP]

I trash picked up a K2 Proflex that was just lying in the street. The fork is missing a few pieces. It's your for the price of shipping.

THANK YOU.
PM sent.

[RWP]

What is the advantage of these forks over using a double or even a singe crown fork?
From my untrained eye, they look like fork gimmicks.
Sorry for the thread jack, say the word and I will delete this post

Oh, they look so

[RWP]

If you want something that's current:
http://www.german-a.de/en/kilo.html

Very NICE!
Thanks Miles.

[Miles]

What is the advantage of these forks over using a double or even a singe crown fork?

It's possible to set them up to resist dive under braking.

[Miles]

If you want something that's current:
http://www.german-a.de/en/kilo.html

Very NICE!
Thanks Miles.

Very expensive, too.....

[jimincolorado]

What is the advantage of these forks over using a double or even a singe crown fork?

It's possible to set them up to resist dive under braking.

They tend to weigh less as well. ProFlex/K2 sold lots of these bikes in their day and almost all the riders who had them raved about their handling.

[whereswally606]

I have two sets of these forks, one fitted with a spring, one with a fox float shock. Problem for me was the 1 inch steerer. my scott ransom is 1.125 inch and i shimed it and used the 1.125 head set. not ideal but did the job for about a year before yesterday when i upgraded to some 2002 boxxer shocks. I will say this for them, my bike is heavier now with the boxxers but stability wise not the best in the wrong steerer size. good to see someone on your side of the pond had something else i would have offered to sell you mine.

regards Andy

[Hangdog98]

LOOK also made some of those forks with a Fournales air shock and carbon legs. Pretty funky.

[RWP]

What motor is more powerfull than a Turnigy?

Maybe this one: viewtopic.php?f=31&t=40859

I would like more info on that 6 pole wind you did on the 80x. [jacking my own thread here] Are the opposite poles wound Cw and CCw? What is the winding pattern? I really like the idea of getting a bit more copper around each pole and having some air flow. Link to that thread please!

you will definatly want to keep the drive sproket as close to the pivot point as possible

I will try for a concentric drive/SA pivot

but if you looking at 4" if sespension movement, it will be easer to contend with for sure. Add that it is an on-road cruiser & its may be a mute point

3-4" is about what I am after

lets see some some choppin & welding!

Soon - got to do a bit more planning first and waiting for my forks to arrive.
I like the flowing cruiser lines but also stuff like this: viewtopic.php?f=28&t=41370

LOOK also made some of those forks with a Fournales air shock and carbon legs. Pretty funky.

Thanks, Got a link to the thread or maker or more pics?

[Miles]

Interesting stuff in this thread, Roy:
http://www.ridemonkey.com/forums/f19/fr ... rk-242332/

[RWP]

Interesting stuff in this thread, Roy:
http://www.ridemonkey.com/forums/f19/fr ... rk-242332/

Thanks Miles, Interesting indeed!

[RWP]

Interesting stuff in this thread, Roy:
http://www.ridemonkey.com/forums/f19/fr ... rk-242332/

Wow - some wild forks and machines in that link Thank you again Miles!
Wonderful reading and viewing for makers.

[Miles]

You're welcome.
Here's an earlier one: http://www.ridemonkey.com/forums/f19/li ... dh-224254/

Also, check out Tony Foales site for a great exposition of the geometry - especially the section on anti-dive. http://www.tonyfoale.com/Articles/Dive/DIVE.htm

[Harold in CR]

Been doing some research on the linkage forks. They are supposed to help greatly with brake dive. However, I have come across a forum that pretty much believes that these type forks do NOT help with reducing brake dive.

Any users input would be greatly appreciated.

Also been researching Girder forks. Looks like they have changed significantly, to where the popular design being wanted, is no longer available.

Aussie jester might have some input on this Girder fork, because he is constantly looking. AJ ??

[Miles]

Been doing some research on the linkage forks. They are supposed to help greatly with brake dive. However, I have come across a forum that pretty much believes that these type forks do NOT help with reducing brake dive.

Have a look at the link I posted above, Harold. Unlike telescopic forks, they at least give you the possibility to design for whatever level of anti-dive you want.

[Harold in CR]

Thanks Miles.

I have been on Tony Foales site and bookmarked it. Found a Bicycle forum of "Elitist" types. Mostly bitching and arguing, and, that's where the "not effective diving" info came from. No way I'm posting on that forum.

RWP, sorry to be muscling in on your thread. It was just too interesting not to.

[RWP]

RWP, sorry to be muscling in on your thread. It was just too interesting not to.

No problem. My motorcycle buddy raves about Tony Foale and his site.