K2 / Proflex Riders Group

General => Tech Forum => Topic started by: rapiddescent on September 13, 2012, 04:53:28 am

Title: RDS CORSPRING for 856, XP etc
Post by: rapiddescent on September 13, 2012, 04:53:28 am

Whilst building my wife's new bike last night - I was searching for cable ferrules and found.... a box full of COR spring CNC components that some enterprising member of the forum may wish to combine with springs and get a few more bikes upgraded from elastomers.

The parts I've found (rough volumes):
+ 10 top hats
+ 10 rear cups which the bevelled groove (for 856 etc swingarms)
+ 25 front cups for the vector fork

Title: Re: RDS CORSPRING for 856, XP etc
Post by: Colin on September 13, 2012, 06:25:58 am

emailed you

Col.

Title: Re: RDS CORSPRING for 856, XP etc
Post by: rapiddescent on September 14, 2012, 01:47:43 am

thanks Col,
I'll check email when I get back later.  I've got the dimensions and the spring rates for the cor springs kicking around.  make sure that the front spring is progressively wound.

One of my customers managed to get a front COR CNC CUP to work with an 855 - the difference between the older 855's (remember there were two version) and the 856's was the connection between the swingarm and the shock - hence the bevel in the cup.  However, i never actively sold to 855 owners because the lack of damping in an 855 shock would pogo the shock which would be quite dangerous with a coil spring.

Title: Re: RDS CORSPRING for 856, XP etc
Post by: kiwi on September 14, 2012, 04:59:25 pm

but all 855(and 755 wc) had flat shock/ strut interface,or are you saying later ones had the bevel(i call it cone)

Title: Re: RDS CORSPRING for 856, XP etc
Post by: randyruderob on October 31, 2012, 12:38:54 am

I'd love a pair for my 856 if thats possible?

Title: Re: RDS CORSPRING for 856, XP etc
Post by: Spokes on October 31, 2012, 07:55:09 am

You can call it a cone if you want to Paul it's ok.

Chris

Title: Re: RDS CORSPRING for 856, XP etc
Post by: fyrstormer on November 01, 2012, 02:48:07 pm

Technically it's a frustum (http://mathworld.wolfram.com/ConicalFrustum.html), not a cone. :P

Title: Re: RDS CORSPRING for 856, XP etc
Post by: Spokes on November 06, 2012, 09:13:16 am

get you with your fancy words!  ;)

Chris

Title: Re: RDS CORSPRING for 856, XP etc
Post by: fyrstormer on November 12, 2012, 09:57:54 am

I like the word, because of the explanation my geometry teacher gave:

"The word 'frustum' is related to the word 'frustrated', which in turn is related to the word 'castrated'. In this case, the cone has its tip cut off, thus frustrating it."

Thanks for that mental imagery Mrs. Smith.  :'(

Title: Re: RDS CORSPRING for 856, XP etc
Post by: dirkhunt on November 13, 2012, 05:44:21 pm

here is what I did(http://farm9.static.flickr.com/8204/8183820588_0a05c5a582_s.jpg)

no springs just an air shock... the hard part was finding a 6 1/2 inch shock

Title: Re: RDS CORSPRING for 856, XP etc
Post by: Spokes on November 14, 2012, 12:23:18 pm

That's very nice. Did the shock fit onto the original mounting points or have you altered/made your own?

Chris

Title: Re: RDS CORSPRING for 856, XP etc
Post by: DugB on November 30, 2012, 10:44:08 am

I've seen this before but it only seems to work when using the Vector 1 top linkage arms (as opposed to the single, silver top linkage arm on the Vector 2).

Title: Re: RDS CORSPRING for 856, XP etc
Post by: Spokes on November 30, 2012, 02:39:33 pm

Ah I guess the Vector 1 would have more room to fit the shock?

Chris