Idworx has a website. Took about a minute to find the DD's geometry at:
http://www.bikebasics.de/idworx/nl/Bikes/Double_D/Geometrie/geometrie.html
A 68 degree head angle, and yes - 93mm of trail. Obviously DH-derived Freeride-style geometry; meant
to be stable on downhills, even with the fork compressed. So yes, it will be sluggish just about
everywhere else. Which is why it's unresponsive hands-off.
"Tim McNamara" <
[email protected]> wrote in message
news:[email protected]...
> gvw <
[email protected]> writes:
>
> > My nephew bought a secondhand idworx Double D mtb (still damn expensive). Ofcourse I tried it,
> > great bike, great handling, massive tires, very light. But when I tried to open my jacket,
> > riding with no hands on the bar, I lost control. This surprised me since my nephew told me it
> > has enourmes trail (I looked it up 93mm!!).
>
> Do you mean trail or fork rake (a.k.a. fork offset)? Trail is a geometric quantity that is
> determined by head angle, fork rake and wheel diameter.
>
> See
http://www.sheldonbrown.com/gloss_tp-z.html and scroll down to "trail" and also read the
> other links.
>
> Trail is the distance from a vertical line drawn through the hub to the ground, which is the
> center of the "contact patch" between the tire and the ground, and a line drawn through the center
> of the head tube to the ground. Normally the vertical line through the center of the axle "trails"
> the line drawn through the head tube. Draw this on a piece of paper, and then imagine what happens
> if you leave everything the same but increase the fork rake: the trail decreases and hence the
> stability of the bike decreases.
>
> If your bike has 93 mm of trail, it will be so stable that it will be hard to ride. If it has 93
> mm of fork rake, then it's quite possible that it has little or no trail and is very unstable. For
> certain types of trick riding this can be desirable.
>
> > Is there such a thing as to much trail?
>
> Well, yes. The bike becomes so stable that you can't hardly turn corners. This is often a
> consequence of having too much rake on the fork for the given head angle and wheel diameter.