Schlumpf hubs: general discussion

M0871 has a new home!

Here are my first impressions of M0871, installed into a 19" trials wheel and a Nimbus Equinox frame.

I ordered the hub directly from Florian and had it shipped to Silva Cycles in Campbell, California. They installed it into the Nimbus Equinox frame. Perhaps I was not clear enough in my correspondence with Silva, because I wanted 137mm cranks, and they installed 137/165 DH cranks. Also, I wanted the stock seat which comes with the Equinox, which is the Nimbus Street Saddle (last time I looked), and they sent it with a Nimbus Gel Saddle. I also wanted a 300mm seat post, and they sent me a 250mm seat post. It turns out, after taking the thing for a ride, I’m not upset, at all, but rather pleased/intrigued by the changes to my order. More on that, later.

My first impressions are probably as run-of-the-mill as one would expect from a first-time Schlumpf rider. I started by manually placing it in high gear, then proceeded to miss my first couple mounts. Once I mounted seat-in-front, I was able to ride away, and it didn’t take long to static mount in high gear. Of course, it felt really weird, and I was slightly put-off by the small amount of play which I understand is normal in the Schlumpf hub. I rode up and down my street a few times. Then I stopped, shifted into low, and that’s where the big surprise happened: After only a couple minutes riding in high gear, low gear seemed ridiculously low; the lack of pedaling resistance was off-putting. I was not expecting that.

I wanted to practice shifting, but I didn’t feel like dropping my baby on the street, so I took it to an undeveloped, dirt/weed area adjacent to my neighborhood. I wasn’t ready to shift while moving, but I succeeded, with pretty good consistency, at shifting while in a still stand. I have U.S. size 13 shoes. Using this method, though, resulted in different amounts of slippage from one shift to another, some involving a small click-into-place, and others involving a significant free-rotation of the pedals, followed by a UPD. I was more successful down-shifting from a standstill, than I was up-shifting.

I rode down a moderately steep, off-road hill. In some ways it felt like riding a big wheel with shorter cranks. This being a new experience, I was working a lot harder, and I was sweating pretty hard. Then I rode up a long-ish, paved hill, in high gear. I was surprised at how fast I got up the hill, as well as how strenuous going up the hill was.

There was a limit to what I could climb, in 1.5 gear / 137 cranks. I’m going to swap to the 165mm hole in the DH cranks tomorrow and see what hills I can make it up in both gears. Pedal strikes may be an issue; I will find out. Low gear will be even more ridiculously low. Regarding the seat, I’m planning on taking longer rides, so it turns out I’m happy with the softer, Nimbus Gel Saddle. And the seat-post: I didn’t need a 300mm seat-post; the 250mm seat-post, combined with the long-neck frame, gives me as much seat-height as I can handle.

So, thank you Silva Cycles, and thank you Florian! I understand this is not a very practical use for the hub, but my interest is mostly learning how to use the thing, and using the thing in lots of different situations (even if none of those situations are exactly “optimal”). I’m going for a ~10 mile mUni ride on it this weekend. It’s too early to say what my ultimate feelings are about the Schlumpf geared hub installed in the 19" street/trials unicycle, but the first hour was awesome!

schlumpfMobileResized.JPG

On earlier models you have to install the spokes in the right direction.
see http://www.unicyclist.com/forums/showpost.php?p=1377511&postcount=125

This morning I changed the cranks on my 29" from 150mm to 127mm. I had done that a few months ago, but didn’t like it. Now it felt really good and did a 10km ride, which was very comfy.
How does that relate to riding a high gear. Next week or the week after I will get my new KH29 geared Schlumpf. Is high gear 150mm still going to be faster than 127mm no gear?

The better option is to have dual hole 127/150 cranks.
Yes you will probably be faster with 150 on a G29 than with 125 on a ungeared 29er, not necessary at the beginning.
150 is what you want to learn with, and maybe after about one or two hundreds of miles/km in 2nd gear with the pedals on the 150 hole you’ll give the 125s a try in 2nd gear.
The hardest thing is to get the balance which is weird at the beginning.
I have tried 137s, then 127, then 137 again and finally bought 127/150 spirits and since I have been staying on the 150 hole.
With 127s it felt weird, easier with 137 but still not so easy to manage.
Much better with 150s.
When you start to get relaxed in 2nd gear, it becomes easier to pedal and to keep balance.

150mm high gear is way faster than 127mm ungeared. Also way harder to control, almost impossible to idle, tricker to hop.

For my daily commute I nearly always take the 29/110 over the geared 29/150.

If I’m road racing I go geared 29/125.

I like that…
I can’t idle at all, whatever unicycle I use. For now I don’t need to be able to. Just riding on whatever surface is fun enough and I’ve been putting some more focus on hopping. I don’t know how the geared uni will do for me riding off-road, maybe I want to handle it with care, since it’s an expensive machine and only ride it on asphalt.

I use my geared 29er off-road, but almost exclusively in low gear except on super-easy stuff. (I use high gear getting to/from the trail).

I just did a major re-configure of my geared 26 commuter.

After swapping the studded winter tire for a summer one it rolled so much faster and the 137s felt a bit long. I decided to throw on 127/150s and at the same time swapped my conventional fusion freeride with a long handle for a Zero with no handle. The thought was to go with a minimalist setup primarily for MUni using the 150 holes but have the option of 127s for a road ride.

I spent the night in the city Friday night and in the morning rode with a friend to her work. 12km and windy as, other than the wind it went really well.

I was worried about riding without the handle but it turned out not to be a big deal, and I really liked using the 127s with the moderately fast rolling tire. The wind took a lot out of me and I had to ride a few sections in low gear but with the shorter cranks it didn’t feel as silly as with the longer cranks. It was the first time I felt that both gears were really helpful on a commute rather than just high gear.

The Zero saddle I am not quite sure about yet. It didn’t feel too bad on the way out but the first 3-4 km on the way back I was a bit tender before numbing. I like the slimmer profile but the Zero might require padded bike shorts to be truly comfortable. I started with one spline visible at the back but tipped it up one more notch after a while. I also lowered the seat a bit more than I would have with a regular saddle.

OMG!!! How do you fly this thing???

I just came back from my first ride practice with the 29 Guni (KH).
It was both hellish and amazing all together.
It took me about 10-15 minutes to get on this thing (freemount) and actually being able to ride. It felt as if I was in a parallel dimension in which I do not really know ride unicycle…
After I managed to ride a bit and felt really confident in what I was doing it was pretty good but still kind of stressing.
The weird thing (and I’m sure you all been through this) was that when I reverted the gear back to 1:1, it took me several minutes to be able to freemount - an action that I could do while I was even asleep in the middle of the night with my eyes closed… it really blew my mind.

Can anyone please calm me down and tell me I’m going to be alright with this?

Thanks :):):slight_smile:

Wellcome to the schlumpfth dimension :smiley:

I experienced the same …

Back in 2008 when I got my G36, I was also shocked - I did not just “learn” it instantly like it seemed others did. Even though I had ridden way over 10k miles on ungeared 36, it was like being a beginner all over again. After 200 miles I wasn’t struggling so much. After 500 (including the India Uni tour), I was more comfortable. 9000 miles later, I am still learning and improving.

In the beginning I made one rule: never mount in high gear. Always practice shifting. Learning to ride slow seemed to help so sometimes I would stay in high gear while having to maneuver around people, cars, whatever. Then try that while shooting photos etc. Also early on I tried practicing just shifting: go at somewhat slow speed and shift up, down, up, down, … as quick as possible. You can actually do it shifting every half turn.

All the time you put in learning is worth it! If someone took my Gunis away I would ride a bike!

—Nathan

Just wondering if there’s much play as you turn the cranks? i.e. do they respond immediately or is there a delayed response from the hub?

Guys, thank you so much for your feedback - it really puts me into correct perspective now that you’ve shared it with me.
It’s not easy being pretty much the only one in Israel right now riding this thing with no close reference. But you are the “game changer” that allows me to go through all the obstacles :slight_smile:

Regarding the “play”, it’s good thing you’ve mentioned it because there is something like 1 or 2 mm of ‘freedom’ when moving the cranks back and forth before the actual wheel turn occurs.
I thought at first my cranks weren’t tightened enough, but they were fine of course.

Is this ‘freedom’ of the back and forth movement by design?

Thanks

The little play comes from the design, I noticed it at the beginning, but I nearly don’t feel it anymore now.

The balance trick in 2n gear that makes you feel like you don’t know how to ride a unicycle anymore will disappear with time and practice, especially if you use 150’s, cause with shorter cranks it is worst (in my case at least when I started).
At first you are nervous, like a beginner on a unicycle, and it takes much efforts to pedal and you struggle to keep balance, but once you start to be relaxed it becomes easier, and as it becomes easier you get more relaxed and so on.

I have also experienced the “how to mount in 1st gear” after a little ride in 2nd gear.
This will also disappear with time.

This afternoon I tested the 2nd gear of my G26 with only 15 PSI in the 26x3 knard tire.
I was surprised how stable and fast it was, at the price of more efforts but not so much.

I played with a jogger, I tell more here:
https://unicyclist.com//t/pictures-of-your-latest-ride/99617/10372

@one4all. Yes, I believe it is. I was wondering did the new schlumpf hub have this ‘play’ and it does. Is that looseness felt on each revolution or is it just on the first revolution as you begin riding?

Today I got my new KH29 and schlumpf. The Knard wheel is fatter than on my Nimbus Oracle 29", so it took a few times riding off in normal gear. There certainly is some play when taking off, but once you keep pedaling there is no more looseness.

I will keep all of your post as that is exactly how I experienced it today when I finally got the new KH29 and schlumpf. After a few tries, I felt ok again on the 1:1 gear, but I’ve never ridden geared before and I have no idea how to freemount in highgear. I also tried holding the wall, but the wheel rolls too quickly. I have no idea how to tackle this. I am sure that while shifting to another gear, if even I can hit it with my ankle or heel, that it will be an immediate UPD. It would be nice to just ride it in high gear for a few rounds to get the feel first. Please tell me how.

Thanks Setonix:D

Setonix, wow a gear hub! I’ll be watching here for more progress reports. I don’t think I could handle one of those.