MTB technology to MUNI?

I know they would be weak for dropping and ‘hardcore’ Muni, but I think you would just fly down the trails on a 29" rim (Gary Fisher Bicycles introduced them late last year). I wonder if we’ll see the 29" rim show up on a Uni?

Unless I’m missing something here, isn’t it automatic that the bigger the rim diameter, the faster you will go?

How about this: Is there a way to adapt the RaceFace ISIS splined BB/cranks to Uni use? What length is the spindle on Unis? Are they the same spindles used on bikes, but just go through the hub?

Re: MTB technology to MUNI?

Sofa,
Look through unicycle.com under the touring unicycles. The Pashley Trail
and Tour or something like that has a Wilderness Trail Bikes (WTB) Nano
Raptor 29x2.1 tire.

The topic of ISIS hubs has been discussed already, and rejected. Here is
an excerpt of a previous post from Kris Holm:

>Yes this is a possibility. I started working with Raceface on this one,
but there are a couple of
>issues:

>1) Volume. Profile has put quite a bit of work into producing their hub,
which works great despite
>the squeakiness. It’s hard to convince a namebrand manufacturer to
commit time to this small
>market and it’s awesome that Profile has been making these cranksets.

>2) Expense. I think that one of the most important thing for the growth
of our sport is to make
>the unis less expensive, because so many people are not able or willing
to spend $1500 on a
>unicycle. ISIS aren’t always expensive but often are quite expensive.
Stay tuned for a less
>expensive pinch-splined crankset, coming soon…

>3) Design. ISIS cranks are tapered splines. Non-tapered splines are
actually a better design for
>a unicycle, in my opinion, because they allow everything to nest
together on the axle (ie you
>slide the bearings and cranks on and it all just fits without any space
due to the taper. This
>could be worked around with the ISIS so it’s not a really huge factor.

>4) Crank lengths. Right now I don’t know of any available super-short
ISIS cranks to fit the
>Monty Trials setup. In contrast, short BMX cranks are more easily
obtained. Custom-making short
>crank arms would definately put the cost through the roof.

>-Kris Holm.

Jeff Tuttle


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Well, that answers that, doesn’t it? Thanks for the response, and I have to remember to search before I post. I didn’t think they’d make a uni-specific ISIS, I was just wondering if it could be jsut transferred over. No for both!

Thanks

Re: MTB technology to MUNI?

My understanding is that Gary Fisher’s 29ers use cyclocross (or other strong)
700c rims–regular size for road bikes. The extra diameter comes from tires
that are fatter than you usually put on a road bike rim.

David Maxfield
Bainbridge Island, WA

Re: MTB technology to MUNI?

— Sofa <Sofa.1yymz@timelimit.unicyclist.com> wrote:
> How about this: Is there a way to adapt the RaceFace ISIS splined
> BB/cranks to Uni use? What length is the spindle on Unis? Are they the
> same spindles used on bikes, but just go through the hub?
>

Definately this would work in theory, but there are lots of practical issues that are problematic:

  1. It is really hard to convince anyone to manufacture high-end products at the low volume of
    production that our sport is at right now.
  2. Raceface (nor any other ISIS crank manufacturer I know of) doesn’t make spindles long enough to
    fit through the hub- they’d have to be made specially which would further increase cost.
  3. You can’t get short ISIS MTB crank arms as far as I know, plus you have to deal with the spider
    on the right hand cranks.
  4. A tapered spline is technically really nice for not creaking, but the non-tapered (e.g.
    Profile) spline works really well on the uni because everything (bearings, spacers and cranks)
    slip on to the axle and hold everything tightly together.

So I’m not at all saying that it isn’t possible; just that there are a few logistical details that
would have to be worked out.

-Kris.


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Re: MTB technology to MUNI?

Sofa <Sofa.1yymz@timelimit.unicyclist.com> wrote:
> I wonder if we’ll see the 29" rim show
> up on a Uni?

Leo White has a muni 29er, he begged a tyre and tube from Gary Fisher at
the Red Bull Mayhem last june and has fitted it to a 700c rim in a nimbus2
frame. Itried it out cross country the other weekend ( only for a short
bit of up-hill rutted track) and its lovley. Also tried it indoors and it
goes like a dream, so fast so smooth and so manoverable ( compared to a
coker this will turn on nothing).

Nice size of uni. I can’t wait till an excuse to build one myself comes
along.
Sarah


British Unicycle Convention #9 April 19-21 2002
Unicycle Hockey, Games, Muni rides, Quidditch and Barn dance
Harry Cheshire High School, Habberley rd, Kidderminster
http://www.unicycle.org.uk/buc9/

Re: MTB technology to MUNI?

“Sarah Miller” <sarah@vimes.u-net.com> wrote in message
news:3c9e204d.1428@vimes.u-net.com
> Sofa <Sofa.1yymz@timelimit.unicyclist.com> wrote:
> > I wonder if we’ll see the 29" rim show
> > up on a Uni?
>
> Leo White has a muni 29er, he begged a tyre and tube from Gary Fisher at
> the Red Bull Mayhem last june and has fitted it to a 700c rim in a nimbus2
> frame. Itried it out cross country the other weekend ( only for a short
> bit of up-hill rutted track) and its lovley. Also tried it indoors and it
> goes like a dream, so fast so smooth and so manoverable ( compared to a
> coker this will turn on nothing).
>
> Nice size of uni. I can’t wait till an excuse to build one myself comes
> along.
> Sarah

You need one, you need one, you know you do.

I’ve got a 700c/29" wheel and I’m addicted. I just eulogised about it in
another thread so I won’t bother here. In short it’s fast enough to ride to
work yet manoeuvrable enough to go offroad and still works in mud so I can
go muni riding in the evenings after work. I’m probably going to ride it in
the Red Bull race this summer for at least some of the laps.

Joe

Re: MTB technology to MUNI?

Hi all,
Along the lines of 29" wheels, does anyone know what the largest tire
that will fit in the Sem XL 28" frame? I know there is a narrow and a
wide, but what are the limits of each. I’m thinking of buying the “Sem XL
Lite” found in the Touring section of unicycle.com and putting the WTB
Nano Raptor 29x2.1 (or 700cx42) on it. Would I have to request the wide
frame for that?

Thanks for answering my questions,
Jeff Tuttle


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