Author Topic: Proflex 755 WC shock upgrade (Read 10118 times)

93Cobra#2771 · « **on:** November 30, 2004, 06:29:31 am »

I've done searches, but I can't even get a hit on "755" [smiley=worry.gif]

Any how, I posted another post saying I might be selling my bike, but I'm also kicking around the idea of upgrade from the MCU's to a real shock. That way, I can keep the bike forever without having to worry about the MCU's getting hard like the first set did, and going through the fight of finding a supplier for them again.

Has anyone upgraded their 755 WC? I'm looking for an affordable upgrade, and I'm not a racer or anything like that. Not even a heavy trail rider, for that matter.

Richard White

kiwi · « **Reply #1 on:** November 30, 2004, 06:55:40 pm »

if you search the forum a little bit you will see many many posts onthis subject.Your 755 wc is the same (as far as shock upgrades go)as a 855,and maybe the same as a 955.but the 855 has a different strut and bottom shock mount than other wc bikes.(cue for trevor to post his pics of an 855 strut and 856 strut)

junkster · « **Reply #2 on:** December 02, 2004, 01:58:20 am »

Hi, check out my 855 shock mods under Junkster in the Gallery.

cheers,

Dan

93Cobra#2771 · « **Reply #3 on:** December 02, 2004, 06:34:41 am »

I went through your pix, but none really detail the bracket you made/had made. Care to elaborate on what was involved? Which shocks would work besides the one you used?

Ive got a line on a Noleen NR2 for dirt cheap going right now, and am wondering if I can make it work or not, for either the front or rear. I guess the trick is whether or not the shock itself can take the pressures of being the strut as well, right?

Sorry for the newbee questions here, but I've been out of the mountain bike loop for quite a while...

kiwi · « **Reply #4 on:** December 02, 2004, 06:20:41 pm »

the nr2 you are looking at,if for a proflex will probably suit every other wc bike but the x55.All the other models have a conical interface between shock and strut,but the x55 has a flat interfsce.Unless you have a somehow aquired an x56 strut you wont be able to use a nr2 as bolt on swap.

93Cobra#2771 · « **Reply #5 on:** December 03, 2004, 03:57:27 am »

Geez, how lucky can I get? I know what you are talking about, I believe. Anyone got a '56 strut for sale? Or could I mod mine to work (I'm pretty mechanically inclined).

What about the front shock? Would a NR2 work there as well with minor mods?

kiwi · « **Reply #6 on:** December 03, 2004, 09:18:49 am »

there was(and maybe still is) a noleen for the vector fork,but a noleen of a crosslink MAY be too long for a vector,i have a link here somewhere to a coool site for upgrading the vector fork.search the fairly recent posts there have recently been at least two serious threads about adapters for rear shocks.If you are making an adapter it doesnt really matter which model bike you have,but its nice if you can get a shock which has the correct stroke to travel ratio cos that means the spring and valving will be about right.

UPGRADE YOUR VECTOR!

junkster · « **Reply #7 on:** December 03, 2004, 08:50:22 pm »

Hi 93Cobra#2771, if that is your real name! [smiley=blankstare.gif]

the adapter was real simple. It is sourcing the material that would prove problematic - I used an old alloy push scooter for all my mods on the K2 5000, and some, inc this one, on the 855.

I cut away a part of the adapter for the shock air valve, and also packed it with fiberglass putty for rigidity.

I am not sure if an adapter for the front is possible. Depends on what forks you have of course. As posted earlier some guy used parts from 98 crosslinks on his vector forks, but of course you have to source them. It is all to do with the length of the shock and lower eyelet diameter.

I recently put some Girvin elite legs on my Girvin vectors - and have a modified ODS shock unit. check out my gallery again.

Anyway, if you have a 856 conical rear strut you could mod my design for it. I have found with all my mods there is usually a way around most of the incompatibilities with these bikes - just takes a bit of imagination.

here is a crude schematic of the 855 shock adapter no measurements here but you get the gist.

Also, check out autoduel in the gallery - he made his adapter with minimal tools.

keep me posted of your progress, would be interesting to see another design.

cheers,
Dan [smiley=beer.gif]

93Cobra#2771 · « **Reply #8 on:** December 05, 2004, 11:51:58 pm »

Quote

If you are making an adapter it doesnt really matter which model bike you have,but its nice if you can get a shock which has the correct stroke to travel ratio cos that means the spring and valving will be about right.

I agree completely. It will do me no good to have a longer bodied shock, as it would be compressed more than intended, prob. putting it out of it's effective operation range. I'm not super knowledgeable on mountain bikes, but I tinker with cars quite a bit, and understand a little about suspension.

Quote

Hi 93Cobra#2771, if that is your real name!

[smiley=laughing.gif] Real name is Richard White. Screen name is my car, as I frequent several mustang boards.

Quote

keep me posted of your progress, would be interesting to see another design.

I will. This will prob. be a long and painful process, as I'm notoriously anal about doing this kind of stuff... [smiley=nod.gif]

Thanks for the continued replies, guys! If you think of any other fun things to add, throw them in here as well...

tmaybee · « **Reply #9 on:** December 07, 2004, 06:29:35 pm »

Here ya go.

x55

x56

Cheers,
Trevor

93Cobra#2771 · « **Reply #10 on:** December 16, 2004, 02:26:14 am »

tmaybee - thanks for the addition. I didn't get a topic reply on this, or I would have replied sooner...

Sprucey · « **Reply #11 on:** December 16, 2004, 03:16:17 am »

Hi Guys,

I have the same problem - 856 main triangle with 855 rear seatstay strut.

I seem to recall that Risse doa thing called the Freedon plate to allow one/some of their shocks to work with this set up - not sure if anyone cn comment?

You don't want to use too ong a shock - it won't effect the stroke of the shock much (that's more rider weight driven) but it will affect the geometry of the bike and therefore the steering.

If you stay with the Vector/crosslink fronts keep the rear I2I as close as possible to original. If you fit a longer travel mosern front fork (100mm Marzocchi for example) you can get away with the rear being longer by as much as 15mm to balance the taller front end.

This pushes the BB up but modern forks/shocks use more sag so in reality it is minimal.

My 856/55 is still in the loft. I need afront fork and rear shock to bring it back to life in it's single speed guise. A future project.

Sprucey

tmaybee · « **Reply #12 on:** December 16, 2004, 04:31:48 am »

Hi Sprucey. The x55 strut will work with a Risse shock directly. You need the freedom plate adapter to use an x56 strut. I actually swapped out my x56 strut when I went to a Risse because the strut is lighter and not having the freedom plate adapter is also lighter. Here is a pic of my setup.

Cheers,
Trevor

kiwi · « **Reply #13 on:** December 16, 2004, 09:40:41 pm »

and i think ifyou use a later model shock on thr x56 you wont need the plate either.it was to enable the same shock to be used on the x55 and x56,once they went to the cone end you dont need the plate with the 6.....

gazinga · « **Reply #14 on:** October 04, 2005, 06:41:18 am »

Can anyone send me a pic of the freedom plate. I am trying to fix a Fox vanilla on my 856 strut arm, but need to figure out how to attach the bottom eyelet. I can't tell if the freedome plate connects to the eyelet on the shock and then bolts to the strut arm.

Thanks mucho amigos!!!!!

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Author Topic: Proflex 755 WC shock upgrade (Read 10118 times)