On Sep 1, 10:07 pm, eganders <
[email protected]> wrote:
> I removed the MCU springs and checked the bushings in the fork.
> Everything in the fork appears to be like new except the MCU springs
> which have all the red (soft) springs disintegrated and one of the
> purple ones in bad shape. I am looking into getting some urethane rod
> stock of several durometers. I am suspicious of using metal springs
> because of the short stroke in these shocks. I think urethane has a
> sharper, non-linear rise in springrate. What are Speed Springs? I
> could not find much on the internet about them. I have only done a
> short search, however.
Eons ago when the world was young, a vast evolutionary
diversity of mountain bike parts manufacturers sprang
up to colonize fertile territory, and lo! parts sprang
forth upon the earth, and it was good, except some of
these parts were made of cheese, and lo! yet more
tiny machine shops sprang forth to make upgrade parts
for the cheesy ones, and indeed for the "trick" value,
and it was good, except when it was made out of
too-heavily CNCed aluminum, and then it wasn't so good,
but it did look cool in blue anodization.
The Judy was like that - it was a great fork, except
for the fact that the parts stank. So there was a
micro-industry of upgrade parts: springs, cartridges,
whatnot. Speed Springs were coil springs made/sold by
Mountainspeed as a replacement for the elastomers (and
for a variety of forks, not just Judys).
http://www.mtbr.com/reviews/Shock_Upgrade/product_22873.shtml
They work fine. I still have a pair in a Judy.
I wouldn't worry about the difference in spring rate
between elastomers and coils. Your problem will be
finding some. In theory, any coil spring that was the
right length, diameter, and spring constant could
work, but it might be difficult to find that.
Ben
