K2 / Proflex Riders Group
General => Tech Forum => Topic started by: Stumpjumper1990 on January 07, 2011, 12:53:38 pm
-
Does anybody knows if there is another company that sells COR spring upgrades for Proflex bikes like RDS used to do?
I know about suspensionforkparts.net, but am looking for springs.....
-
as I mentioned over on retrobike, I'm not aware of any but happy to be proved wrong...
-
as I mentioned over on retrobike, I'm not aware of any but happy to be proved wrong...
Yeah! Thanks for that! ;)
Doesn't anybody has som spare RDS coil springs for me?? ;D
-
as I mentioned over on retrobike, I'm not aware of any but happy to be proved wrong...
Yeah! Thanks for that! ;)
Doesn't anybody has som spare RDS coil springs for me?? ;D
if you know what you want it is relatively cheap to get a spring wound,its a very well known art.
-
as I mentioned over on retrobike, I'm not aware of any but happy to be proved wrong...
Yeah! Thanks for that! ;)
Doesn't anybody has som spare RDS coil springs for me?? ;D
if you know what you want it is relatively cheap to get a spring wound,its a very well known art.
you are right, but those end caps and the extra elastomer are more difficult to make/find! :-[
-
The end caps for the ODS shocks can be turned out to accomodate a longer spring.
(http://i6.photobucket.com/albums/y237/w2zero/Prazi%20machines/upconvertedods.jpg)
(http://i6.photobucket.com/albums/y237/w2zero/Prazi%20machines/turningoutspringhat.jpg)
-
the trick is to make a top hat arrangement to accept a longer(normal spring)
The top hat and spring come back partly over the preload adjuster
thats what the original spring kit did i think.I look for pics
****just like the COR kit***** :D
-
Which is what I did by turning out the center of the upper hat for the ODS/elastomer setup and replacing the elastomer with a coil spring. That allows a greater choice of springs since the COR spring is a larger diameter to clear the spring cup from RDS. I have thought about machining some COR type hats as well when I run out of the dark anodized Proflex ones.
Coil spring manufacturers are all over the place, just a matter of looking at their inventory and finding your spring. ID, OD, uncompressed length, flattened ends, wire diameter, metallurgy and number of coils as well as your desired spring rate.
I have been checking rates by using a small shipping scale (bath size) on the deck of my drill press and then setting the depth gauge on the quill to zero on contact with the spring and then reading the scale @ 1". The spring rates printed on some of the springs isn't even close! A 25# difference isn't too bad but there are some I have tested that were close to 100# off.
One and a half times body weight for the rear spring and body weight for the front spring works for me on the 855/856 frames and forks.
-
Which is what I did by turning out the center of the upper hat for the ODS/elastomer setup and replacing the elastomer with a coil spring. That allows a greater choice of springs since the COR spring is a larger diameter to clear the spring cup from RDS. I have thought about machining some COR type hats as well when I run out of the dark anodized Proflex ones.
Coil spring manufacturers are all over the place, just a matter of looking at their inventory and finding your spring. ID, OD, uncompressed length, flattened ends, wire diameter, metallurgy and number of coils as well as your desired spring rate.
I have been checking rates by using a small shipping scale (bath size) on the deck of my drill press and then setting the depth gauge on the quill to zero on contact with the spring and then reading the scale @ 1". The spring rates printed on some of the springs isn't even close! A 25# difference isn't too bad but there are some I have tested that were close to 100# off.
One and a half times body weight for the rear spring and body weight for the front spring works for me on the 855/856 frames and forks.
you onto it.I think the top hat arrangemnt is required if you use a spring that will firt a nolleen??Are they longer than a cor?
-
Yes the Noleen springs are longer (I think) so I'll see about wandering out to the shop tomorrow and measuring. I have several different manufacturers springs on my Pfx's in different configurations. I'll post info then.
-
Yes the Noleen springs are longer (I think) so I'll see about wandering out to the shop tomorrow and measuring. I have several different manufacturers springs on my Pfx's in different configurations. I'll post info then.
i will dig through my spare parts box i think i have a couple noleens in there.
pause
nb2 300 o/all 95mm od 45mm id35mm
(http://farm6.static.flickr.com/5247/5341213945_09429814e3.jpg)
(http://farm6.static.flickr.com/5247/5341827436_6fcc1669c9.jpg)
(http://farm6.static.flickr.com/5082/5341828596_9fa19cbff3.jpg)
-
i will dig through my spare parts box i think i have a couple noleens in there.
pause
nb2 300 o/all 95mm od 45mm id35mm
Thanks for the info and pics. I found a supplier who can make a spring to my liking. This can help!
-
kiwi, is it a help that your springs are 10* N/E or is that just a Newzealand thing ;).
If you can contact Callum of ex RDS, when he shut up shop he had a box of COR end caps left over but no springs. He was trying to sell the whole box if someone else wanted to find their own spring suppier. He would probably still sell the caps but contacting him will be the challenge.
Chris
-
If you can contact Callum of ex RDS, when he shut up shop he had a box of COR end caps left over but no springs. He was trying to sell the whole box if someone else wanted to find their own spring suppier. He would probably still sell the caps but contacting him will be the challenge.
Chris
Just contacted him and he might have some end caps and perhaps some springs! :o :o :D
-
Well done that was quick!
Callum is very helpfull and I suspect he still has a few things stashed away ;)
Chris
-
Well done that was quick!
Callum is very helpfull and I suspect he still has a few things stashed away ;)
Chris
Thanks for the tip!!
Cheers,
Bart
-
result (hopefully!) :)
-
kiwi, is it a help that your springs are 10* N/E or is that just a Newzealand thing ;).
If you can contact Callum of ex RDS, when he shut up shop he had a box of COR end caps left over but no springs. He was trying to sell the whole box if someone else wanted to find their own spring suppier. He would probably still sell the caps but contacting him will be the challenge.
Chris
most interesting thing is the variation in the needle from pics1 to 3 purely from turning the spring 180 deg!.It was the only thing i could find with a scale on it!
-
Finally got out to the garage today to measure a spring or two. The Noleen 350# rear spring is 3.75" (95mm). Also measured the titanium 225# spring adapted to the ODS that was originally elastomer and it was slightly over 3" (78mm).
Presently working on some research to find titanium springs cheap!
-
titanium springs cheap!
oxymoron (http://en.wikipedia.org/wiki/Oxymoron) ;D
-
As Keith Bontrager said, "Strong, Light, Cheap: pick two"
-
Really? What if you could buy a 225# titanium spring that would adapt to an ODS shock for your Girvin Fork for 45 bucks US? That's what I posted a picture of. Now I am closing in on the guy's source.
-
Really? What if you could buy a 225# titanium spring that would adapt to an ODS shock for your Girvin Fork for 45 bucks US? That's what I posted a picture of. Now I am closing in on the guy's source.
well i dont know what a steel spring would cost in the same circumstances.I was commenting on the fact(perhaps unfairly) that you NEVER associate Titanium and Cheap.Will be great if you demonstrate that we are indeed human!
-
My humanity has been called into question regularly but she hasn't divorced me yet.
I'm just repurposing a spring actually. I bought one of those springs from epay that were advert several years ago. The seller, whoever he was didn't know a thing about what we are looking for. I/E , free length, I/O diameters, spring rate, etc or he could have sold them more effectively. I just sent the money and hoped. Never got around to testing the spring or building up a bike until late last summer. My elastomer stash was running low.
Sure, I can have titanium springs custom wound here in Washington State for $250 each but for that price I can buy a quality steel spring with a gas-charged Noleen shock down the middle of it..... and recently did. The possibility I am closing in on is a spring that is a factory replacement for a high volume application that lowers the price for the rest of us. Problem is, I have to get some new ones and then test them to our application's spec. No point in anyone else pizzing their money away until the prospects look better.
-
Sure, I can have titanium springs custom wound here in Washington State for $250 each
now thats what im talking about!Good luck with your search!
-
No good info on the one I found but it appears to be the right one. It's in a blister pack with a part number... I think it will be a front spring application. Sending the money now....