tuning your trucks for performance - my dual stange bushing set up

[N88]

i saw a bushing set up where the guy had two black barrels on the bottom, and a jim z on the top,

what is the deal with that, and what would the purpose be.

[sasuke1avenger]

Originally Posted by andrew_cruise

acctualy the blue doh dohs are erally nice and have nice compression

yeah Ive got the blue doh dohs on a preety good carving board and they work great

[Thunder]

i use that on my dh deck with red and blue khiro's blue bottom red top pretty goot

[toro]

Geezer-X
Longskateaholic




Join Date: Dec 2004
Location: Bethesda, Maryland
Posts: 103
Re: Obscure bushing idea
I've done a lot of work toward evolving the resistance/return to center curve of trucks. While the bulk of the work was for slaom racers, I've engaged DH racers in discussions as well. In essence, I've never encountered a scenario other than the following: (RTC=return to center)

The rider wants to control the degree of RTC dependant on how much turning they do- Slalom riders want much less RTC than DH guys. The RTC is a sorce of pumping power for a slalom guy.

The rider wants to control the rate at which RTC increases. It can be viewed like looking at the plot of stroke vs. load with a rising-rate motorcycle or car suspension or spring. The amount of pressure applied as lean angle increases at a non-linear rate.

The rider wants a range of travel appropriate to the use of the board. This is a big deal for slalom guys. You want a board which has an aggressive initial turn in. This is absolutely necessary to make it through a set of tight stingers at the bottom of a course, but you need the trucks to "set" so you have stability for the big offset cones mid course while not feeling floppy. Finally, you want as much totaly steering as you can get so the trucks don't "pack up" at big lean angles.



Getting all this to happen is a malti-variable dance of truck type and geometry, wedge angle, bushing durometer and most important, bushing stack height.

Here's a big key; ABANDON CONVENTIONAL BUSHING DIMENSIONS...

Fit much longer kingpins and try a bushing stack thats 50% thicker and 50% softer. Preload the stack to acheive the RTC on center that you want. The additional stack height will keep you from reaching the bind point so soon. The effective adjustment range will be double what you're used to or more.

Bushing rebound is critical. Tracker Stimulators are the best ever. Bushings made from Abec11 wheels are about as good. Khiros are OK, not great. radikal bushings feel dead. Bones Hardcores aren't bad but they're way too short...

The thinnest stack I use is 2 full thickness Tracker Stimulators. I add slices of stims to add height.

Before reinventing the wheel, read about motocross and race car suspension theory and apply the lessons to trucks.

I think this should be here

[inertiatic515]

This is a really ridiculously noob question but...


You can do this with pretty much any type of truck except Seismics, right?

[hakrsakr]

Yes, you can. Bushings are the cheapest upgrade to any board. But even Seismics, Originals, or most any truck that uses springs still have aftermarket springs available.

Oh by the way, creator of this thread, those wheels
SSSSSSSSSSUUUUUUUUUUUUUUUUUCCCCCCCCCCCKKKKKKKK

[inertiatic515]

Wait, so I read on another thread that you can't use Khiro Barrel bushings on Indy trucks?

I was planning on getting that Khiro Bushing Kit w/ all the diff duros for my Superglider, but I've got Indy trucks, and if they won't be compatible then that blows.

The problem I've heard was that the kingpin is too short on the Indys - can't I just buy a longer kingpin?