Author Topic: How can this work?!?!? (Read 7449 times)

whisperdancer · « **on:** February 14, 2007, 03:02:30 am »

Recently I came across a page with an adaptor for x57 rear shocks.

How can this thing work?!?!?

rapiddescent · « **Reply #1 on:** February 14, 2007, 04:23:05 am »

looks like it slides up one of the legs and then fits into place...
the worrying things is that it extends the shock out by about 100mm, so I am not sure how that works exactly.

callum
rds

jeffhop · « **Reply #2 on:** February 14, 2007, 11:00:21 am »

ive been looking into making ( im a cnc lathe programmer/setter )a similar (but shorter) adaptor for the strut bikes but ive been put off as i need to figure out how to stop the shock pivoting on the bottom mounting bolt. what i really need is for someone to loan me a 165mm i2i shock so i can make a prototype then run a few off when im happy with them (free cnc`d adaptor if anyone loans me one and i can get it to work ok)

kiwi · « **Reply #3 on:** February 14, 2007, 06:33:30 pm »

or it is the shortest nr4 i have ever seen....Cnc eh....
you need three parts a cone type end,a middle spacer part which can be made to any length then an actual shock mount.The middle spacer can be made in any length to suit the particular eye to eye of the shock to be used.They all thread together to form one solid "block"

orange · « **Reply #4 on:** February 14, 2007, 06:37:08 pm »

Quote

how to stop the shock pivoting on the bottom mounting bolt.

why isn't that happening on the one in the photo?!

I've got around this problem by rotating the adapter 45 degrees so it can't pivot sideways or up and down. The only time it would pivot is if the wheel was knocked at a 45 degree angle. Kinda works.

whisperdancer · « **Reply #5 on:** February 14, 2007, 06:37:35 pm »

I believe the problem here is pivoting, as I don't believe that one screw and two nuts will tight the shock enough...
The slot is just an open slot:

For this to work, the adapter should be rotated 90 degrees.
That's me thinking.

orange · « **Reply #6 on:** February 14, 2007, 06:49:19 pm »

Rotating 90 degrees doesn't work as then any lateral (sideways) movement pivots it - I tried that! Mine is set at 45 degrees and seems to work.

whisperdancer · « **Reply #7 on:** February 14, 2007, 07:58:19 pm »

Good point.

Maybe a piece with a sleeve that covers the shock end.
If the sleeve was "sloted" like the end of a seat post tube, maybe we can use something like a clamp as in a seatpost...

sammydog · « **Reply #8 on:** February 14, 2007, 09:03:50 pm »

I made one, but mine allows for lateral movement not vertical. I'd be a bit worried with the one in the first post bending, but I have had no problems so far with mine.

This pic isn't the best (bit too far away), but I will post a close up when my camera is back from repairs.

Mine is pretty crude, but it seems to work.

orange · « **Reply #9 on:** February 14, 2007, 09:49:47 pm »

That looks a lot like mine, but as I say mine's at 45 degrees

sammydog · « **Reply #10 on:** February 14, 2007, 09:59:56 pm »

When you sid 45 degrees, that really makes a lot of sense.

I'll probably turn mine this weekend.

All I need to do is make a proper version out of a decent grade metal that doesn't weigh a heap and rust like I do now.

I'll post some pics though when I get the camera back.

rapiddescent · « **Reply #11 on:** February 14, 2007, 11:44:41 pm »

Risse do an adapter for the proflex x55/x56 rear strut. I was going to make some but the economics don't work out unless you're a real proflex nut enthusiast (i.e. us lot!!).

I'm sure I've got a 165mm SID kicking aorund.

callum
rds

sammydog · « **Reply #12 on:** February 15, 2007, 06:41:59 am »

They make an adapter?? I must of missed that. Time to contact them to find out how much.

I've got a Fox RP3 I can get my hands on and would love to put into the bike.

jeffhop · « **Reply #13 on:** February 15, 2007, 10:35:47 am »

........."Cnc eh....
you need three parts a cone type end,a middle spacer part which can be made to any length then an actual shock mount.The middle spacer can be made in any length to suit the particular eye to eye of the shock to be used.They all thread together to form one solid "block""

i reckon i can turn one out of one piece of ally, ive got an idea that im working on that i think might work. at the moment im basing the idea on the only spare shock ive got (astro 5) which i know wont fit cos its too long but im hoping that the idea will work, unfortunately i dont think it will work with a piggy back type of shock but i might look into that in the future. i just need a shock that will fit!

willem · « **Reply #14 on:** February 17, 2007, 02:29:24 pm »

All this machining and engineering makes me dizzy...

Another approach - call it the Neanderthal method - is to taper the strut end of the shock so the "eye" actually will go into the cone recess on the strut. This can be done nicely on a lathe or in 20 minutes with a Dremel grinder.

Then you drill and tap a longitudinal hole in the shock end for the strut bolt. For extra strength, a little epoxy to fill in the joint and "Bob's your uncle." (JB Weld mixed with some CF matt is best)

I've been riding a Manitou air shock mounted like this for two years with no sweat. (BTW I'm weighing in at 210# and like to jump.)

Seems to me the machinist guy from Ontario made some terrific aluminum adapters as well... name is escaping me... good pictures, too. Called 'em ULM's or something.

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Author Topic: How can this work?!?!? (Read 7449 times)

willem