The 24" Oracle Unicycle was one of the very first production Muni Unicycles available with a Disc brake installed as standard. The design is aimed at the serious the unicycle rider offering design advantages that help exceed riders current performance.
Brakes: Bengal Helix5 Hydraulic Disc Brake with 180mm Disc
Saddle: Nimbus Gel Unicycle Saddle - Black
Seatpost: Nimbus 'Aluminium' Seatpost 300mm - (25.4)
Seatpost clamp: Nimbus 'Doublebolt' Seatpost Clamp - Orange
Frame: 24" Nimbus 'Oracle' Unicycle Frame - Black
Tyre: Duro Wildlife Leapard 24" x 3" Tyre
Rim: 24" Nimbus 'Dominator2' Rim - Orange
Spokes: 36, 14 Gauge Black
Hub: Nimbus 'Oracle' Disc ISIS Hub - 36 Hole, Black/Silver
Cranks: Nimbus 'Venture2' ISIS Cranks - 150mm
Pedals: Nimbus 'Studded' Plastic Pedals - Black
Recommended leg length sizes for unicycle:
Standard seatpost: Minimum - 83cm (32.67"), Maximum - 92cm (36.22")
Cutdown seatpost: Minimum - 71cm (27.95")
These sizes are measured from crotch to floor wearing shoes
|Frame - Length||No|
|Seatpost Clamp Colour||Orange|
|Number of Spokes||36 Hole|
- 24 or 26 inch? Review by Keith
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- Very happy with this purchase Review by Tim
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With this rim and tire, the Oracle turns very well, very quickly. This tire/rim combo also has a very nice bounce characteristic which you can dial in with tire pressure to your liking. I noticed that when doing correctional hops on the Oracle 24, I was able to do so with great ease - it has a really smooth and controlled bounce. So what I found with this setup was a muni that turns very smooth and effortlessly, and requires very little energy for technical terrain that requires controlled hops.
I had a lot of cranks already in my possession so I just took the stock cranks that come with the Oracle with no additional charge. At the time of my purchasing, the standard crank was 150mm Nimbus Venture 2 cranks. I did a rigorous 18-22 percent hill climb on gravel terrain, and with somewhat of a low tire pressure. My wheel was actually able to spin out on the climb there was such an abundance of torque. A 24 inch muni with cranks this size has formidable climbing ability for steep uneven terrain.
I ride a 26 inch muni a lot, with cranks anywhere from 125 to 150mm typically. The 24 inch Oracle does well with hill climbing with the 150mm cranks, but for flatter terrain, I felt it slowed my riding to a crawl.
I swapped the cranks out with a set of 140mm Koxx1 cranks however, and the riding really sped back up tremendously, and still had a lot of control. With both crank size setups, I proceeded to ride up and down 20 percent grade gravel/dirt hills, off road drops, cross country dirt/mud trails, and a particular trail that is flat and notoriously covered with tree roots, and hopped up and over some small obstacles a bit. I should also say how nice it was to be able to do this without having to remove and re-attache the spindle for the brake.
The 140mm crank setup certainly matched most closely to the all around capabilities of my 26 inch muni, but with noticeably better performance in making sharp turns effortlessly, and the correctional hops seemed less tiring. I liked this setup best all around.
With the narrower rim, the up side is this bounce and turning ability. The one thing you have to be careful about is this slightly increases tire roll. So you can either avoid it by having adequate tire pressure, or by not gapping sideways as much but rather forward and rolling out - to avoid unwanted tire roll. I am a big rider so I have to be slightly mindful of this. The rim itself though is extremely strong and is known for staying true even when dropping from ridiculous heights.
I did use the brake for a half mile decent on 20 percent grade gravel hill. It simply worked as expected. I like that the cable is secured to the frame. I placed a KH Starfighter attachement to the lever. This lever felt really easy to reach and control with this setup. The seat that I had it attached to was a Kris Holm Fusion Street. This was the first time I had used that seat for muni and I liked it. Very thin and rigid - and responsive when using the handle.
I love that the seatpost that comes with the Oracle has a ruler on it for measuring seat height placements. I do not know why this is not done on all seatposts. GREAT feature.
The dual lever seat clamp is a favorite of mine and I put one of these on my other muni as well. It holds just tight enough to do the job but is easy to take off and adjust without forcing you to carry an allen wrench. I stopped doing that when I started using this seat clamp. Love it.
The cranks all mounted to the hub very clean and the fit is very good - with both cranks I tried. The pedals also threaded flawlessly. I'm used to Kris Holm unicycles, and this had a very similar snug assembly.
Some additional notes: I love that I can use any crank I want on this. I have always wanted to try my Koxx1 140mm cranks for muni and have never been able to do so on a Kris Holm unicycle. This is a unique perk to the hub mounted disc brake design. Also, the disc is mounted to the opposite side of the Kris Holm munis with a Spirit crank setup, which for me works out for doing back-foot grinds on this with my right foot - one other thing I cannot do on a KH24 muni with Spirit cranks.
I am also a huge fan of this color scheme. I went a little further with it putting white pedals on it and love how this jived with the black/orange/white of the Oracle 24. My Koxx1 lite cranks happen to look nice with this setup too.
I thought that when I bought my 26 inch muni a while back that I would not need a 24 inch muni (sold mine shortly after getting a 26 inch). Well, both have their unique place in my opinion, moreso than I originally thought. The Nimbus 24 Oracle is unbeatable as far as a lightweight strong muni that is very responsive with very minimal effort put in, and inspires you to really get off the beaten path and be more playful. It also climbs unbelievably well. And somehow the rotation is really easy to manage for rolling drops off whatever comes. So for terrain that is a little beyond my ability that I want to work on, I would reach for the Oracle 24 with 140mm cranks in a heartbeat. And for stuff where I already know I can ride it no prob, and want a little more momentum and smoothness, I reach for the 26.
This muni is not the most expensive on the market, but it it does not seem to have a downside in terms of performance, strength, features, and looks. If I had one complaint, it would be that I like the idea of seatpost tube for 27.2 inch seatposts. But then again, for muni, I also really like the curved shape of the frame as well. Some people weld the brake adapter to the frame - that saves even more weight and is cool mod.
Very happy with this purchase.
(Posted on 05/03/2015)
- Very robust impressed with the quality Review by Bunty
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- Fantastic Muni Review by Sam
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- Probably the best non-custom 24 as of now Review by Jacob
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Succinctly put, yes.
I was torn between the two but when I finally got my Oracle I couldn't belive that I had ever doubted it's performance and form. In person, the Oracle is sleek and clean looking. It has a super glossy powder coat that really compliments the round crown frame eliminating its circusy stereotype*. The D'Brake doesn't stick out like it does in the main photo and surprisingly I haven't kicked my caliper yet (despite quite a few UPDs). Everything on this uni is milled or forged beautifully. The bearing cups, seatpost clamp, cranks and hub are all very sturdy, eye pleasing and of high quality. For looks, the Oracle gets a very high rating from me.
But, after all, this is a Muni so it has to perform well... and it does. The rim is super strong - shockingly strong in fact. There is no way the average rider will break this rim, even a skilled Muni rider would break a KH rim before this one. Supporting the rim are 36 14 guage spokes that lead down to a very sturdy hub. No welded flanges here, just solid splined interfaces. This hub is fitted Nimbus's latest venture crank and they are a dream to ride. The reduced Q factor (compared to KH Moments) really makes these cranks shine by reducing wobble and improving responsiveness tenfold. Their light weight only adds to this. However, don't let their light weight decieve you, these cranks are really strong and stiff.
As for the main feature of the Oracle, the disk brake, I cannot fault it. There are better disk breaks but unless you want to spend a few hundred £ you might as well stick to the Bengal. This is not to say that the bengal is not one of the best muni brakes there is because that couldn't be further from the truth. The Bengal gives brilliant performance - even when operated by a brake newby like myself! It has buttery smooth modulation and plenty of stopping power - definitely enough for any rider**. But the best feature of this brake has to be the lever. It has this little 'flick' at the end ('integrated spooner') that perfectly cradles your finger giving you really fine control over the brake. Just twist the lever a few degrees to the left or right (depending on braking hand used) and it'll always be withing easy reach.
And that leaves the pedals. These are some of the pest pedals I've ever used. Dirt cheap, light, rugged and grippy.
The Oracle is by far the best 24 I've ridden and there is plenty of room for customisation in the future. If you want the ideal Muni at an ideal price you should get an Oracle.
A true 5* uni.
*In fact, I would say that this round crown actually looks better than most flat topped frames.
**For 99.999% of unicyclists this brake is more than enough but of course for all the Muni riders with severe arthritis and bad technique you can always upgrade your pads and rotor to give the Bengal a boost. (Posted on 29/11/2012)
- Excellent Product Review by Nick
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