New 24" Rim

I just got my 24" uni rebuilt (finally). I now have Dirtworks DiceTwoFour rim
and butted spokes with my original Viscount (Taiwanese) hub, axle and cranks.
The rim cost $95AUS (~$50US) and is a triple-box construction. It’s designed for
downhill mountain bikers and is apparently much better quality than the velocity
rims made in Australia. Apparently it’s the strongest rim that the wheel builder
has ever seen. I haven’t had much time to thrash it around, but the ride is
really solid and it feels beautiful jumping off things up to 24" high (haven’t
found anything higher yet). The rim is so wide that it makes my 1.75" tyre look
tiny. I’m only getting a little bit of tyre fold over when hopping side-ways on
really steep hills, and the edge of the tire is almost in line with the edge of
the rim (i.e. there is no ballooning like on my previous rim).

I’ll go for a more serious ride this afternoon and report on how it feels.

nic

RE: New 24" Rim

I couldn’t find any web-based info on the rim or Dirtworks. Their website
www.dirtworks.com.au isn’t up and running yet, but should be sometime soon. The
rim is still going strong, and I found out it is a four-cross pattern instead of
a standard two-cross pattern. Apparently this sticks more stress on the rim than
on the spokes, but because the rim is so strong, it should be able to handle it

  • does anybody have any information about the relative merits of the different
    spoking patterns?

On the weekend I went to a bmx park with a fellow unicyclist. We had all of the
ramps, jumps, berms and double-bumps to ourselves, but didn’t manage to get a
complete circuit of the course. The major problem was trying to scale the really
steep jumpramps, which were about 5 feet high in a horizontal distance of less
than 2 feet. These were fun to come down - except for the ones with a lip at the
top, which always managed to throw me off just before the descent - ouch! One
major problem I had was trying to hop up relatively minor gradients. I always
found the cycle rolling out from under me, because I haven’t learnt to
counteract the slope by applying more pressure to my forwards foot: any tips or
tricks on how to do this? I’ve tried going sideways, but then the wheel tends to
bounce out weirdly, or the tyre rolls out a bit.

nic

            ----------

From: Chris Reeder <reed8990@uidaho.edu> Sent: Tuesday, November 14, 2000 12:12
PM To: Nicholas Price <NPRICE@rsbs.anu.edu.au>
Cc: <unicycling@winternet.com> Subject: Re: New 24" Rim

    &lt;&lt;File: Mime.822&gt;&gt; Rim sounds cool. Got a website for Dirtworks?

Chris

On Wed, 8 Nov 2000, Nicholas Price wrote:

>
> I just got my 24" uni rebuilt (finally). I now have Dirtworks DiceTwoFour rim
> and butted spokes with my original Viscount (Taiwanese) hub, axle and cranks.
> The rim cost $95AUS (~$50US)
and
> is a triple-box construction. It’s designed for downhill mountain bikers
and
> is apparently much better quality than the velocity rims made in
Australia.
> Apparently it’s the strongest rim that the wheel builder has ever seen.
I
> haven’t had much time to thrash it around, but the ride is really solid
and
> it feels beautiful jumping off things up to 24" high (haven’t found
anything
> higher yet). The rim is so wide that it makes my 1.75" tyre look tiny.
I’m
> only getting a little bit of tyre fold over when hopping side-ways on
really
> steep hills, and the edge of the tire is almost in line with the edge of
the
> rim (i.e. there is no ballooning like on my previous rim).
>
> I’ll go for a more serious ride this afternoon and report on how it
feels.
>
> nic

Re: New 24" Rim

Rim sounds cool. Got a website for Dirtworks?

Chris

On Wed, 8 Nov 2000, Nicholas Price wrote:

>
> I just got my 24" uni rebuilt (finally). I now have Dirtworks DiceTwoFour rim
> and butted spokes with my original Viscount (Taiwanese) hub, axle and cranks.
> The rim cost $95AUS (~$50US) and is a triple-box construction. It’s designed
> for downhill mountain bikers and is apparently much better quality than the
> velocity rims made in Australia. Apparently it’s the strongest rim that the
> wheel builder has ever seen. I haven’t had much time to thrash it around, but
> the ride is really solid and it feels beautiful jumping off things up to 24"
> high (haven’t found anything higher yet). The rim is so wide that it makes my
> 1.75" tyre look tiny. I’m only getting a little bit of tyre fold over when
> hopping side-ways on really steep hills, and the edge of the tire is almost
> in line with the edge of the rim (i.e. there is no ballooning like on my
> previous rim).
>
> I’ll go for a more serious ride this afternoon and report on how it feels.
>
> nic

Re: New 24" Rim

I found a DirtWorks web site at www.dirtworksusa.com However, I asked about
their rims and they said they don’t make any rims.

> does anybody have any information about the relative merits of the different
> spoking patterns?

Here’s one merit of a four cross pattern: The diameter of the hub doesn’t
appreciably change the required spoke length. I’ve had the same set of spokes on
three different brands of hubs.

Here’s one merit of a radial pattern: It looks cool.

> any tips or tricks on how to do this [hop up inclines]? I’ve tried going
> sideways, but then the wheel tends to bounce out weirdly, or the tyre rolls
> out a bit.

I think sideways is easiest on the really steep stuff. A W-I-D-E rim and
adequate air pressure are necessary to keep you tire from folding.

But sometimes the path isn’t wide enough to go up sideways. If you must hop up
forward, it helps me if I concentrate a little more on lifting my legs & the
unicycle and a little less on pounding the rim into the ground. This way your
front leg doesn’t have to be so infinitely strong to send you up the hill.

A rolling start always helps, too.

Chris