Alternative brake rotors for Schlumpf gen. 5

Don’t quite know the price as we have the countersinks to put in… should know that and have them on the site early on next week.

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Got a little surprise this morning, the rotors have arrived!

This one is going to Felix (he will get it tomorrow) so he can check everything. We suspect it may be snug on the hub and he has experience with this so he will check it if it slips right on or needs a little file.

Price is £72 (inc. VAT). We can ship to Europe with local tax and duty paid from the shopping cart that makes things easy for everyone.

I will post the link in here on Monday after I have spoken with Felix.

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Colour me excited!

It will get me to pull down and dust off a Schlumpf and go RIDE too!

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That’s sick! And cheap! I would have expected at least 30% more :star_struck:

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That is ok, I can do you a special price if you would like? £93.60

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Thank you so much for this incredible deal, Roger :smiling_face_with_three_hearts:
At this price, I may even take 70% of a single rotor! Would you cut it for me?

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That’s great news! Thanks, Roger, and everyone else who helped make this happen.

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Wow! I’m amazed that my issues with the original rotors lead to this. Thank you to all involved in bringing this to fruition! I’ll buy a set as soon as they’re available :grin:

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So it’s here and it does look pretty amazing. A Hope rotor for a Schlumpf. Funny when paired with a Hope brake.


It is however a tight fit - much like my BrakeStuff ones were. But this means we will need to file down the tips of the hub interface area:


A hand file should be all that is needed and we just need to remove a small amount all round or possibly from 3-4 tips. I’ll report back when I’ve done this and have it mounted.

It’s a heavy piece of metal and speaks of robust quality. The finish isn’t as nice as BrakeStuff. That’s been sandblasted and has a lighter texture. But it’s from Hope. So they know what works.



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That’s what you get when you all wish for 203/2.3mm instead of 180/1.8mm :rofl:.
Thanks, Felix, for testing this out. If all we have to do is file it a bit down here and there, I think it should be doable for all of us.
Now I’ll have to decide whether or not to switch from 180mm to 203mm with my other 28/29" frame and wheels to be able to swap the wheels as desired…

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Eh, I don’t mind a heavier rotor. It is weight centered near the hub, so really it only affects the weight lifting test.

EDIT: I can see where some weight could be saved if there were a V2 iteration. Smaller holes on the outer braking surface and skinnier arms comparable to the BrakeStuff rotor. But by that point, we’d effectively duplicate the BrakeStuff rotor :winking_face_with_tongue:

It fits! @rogeratunicycledotcom

After a good bit of elbow grease on filing the high areas down. I may have gone a bit further than I needed in some parts but it fit on without any friction or forcing needed and locks into the notches well.



Putting some air back in this beast and taking it down the road and back to finally get a feel for it.


Rotor seems like it will offer the same braking quality of the BrakeStuff or better.

But the oil on the rotor issue is still a real one. The old rotor I pulled off was very greasy - both sides.

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Good to know that the rotors will fit, albeit after some additional effort. And good to know that the beast saw a little action.

Does someone even know in the first place why the rotor and the hub have this wavy inner interface? This is not something I have ever seen on other rotors/hubs and it doesn’t really feels necessary provided that the screws are tightened and glued with loctite.

I think there is merit in this interface design. Mainly due to the fact that this hub is looking to support braking when in high gear so I presume the forces on the rotor are greater than that on non-geared unicycles.

I also spoke about this design choice to Roger the other day and he mentioned that motorcycles’ hubs have this kind of rotor interface… so of all the possible failings that Florian may have made with this rotor set up, I don’t think this hub-rotor interface choice is one of the areas.

Apparently even well tightened bolts can get weakened by slight vibrations and over time break. I think this interface may help that kind of stress from happening.

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Don’t rotors on bike support much more forces than on unicycles? Although a single brake has to stop us unicyclists, we go way slower than bicyclists and they don’t have this kind of interface.

However, I kind of recognize one merit: if screws loosen, the rotor doesn’t move. It happened to me because I forgot to put threadlock on them and I was happy the rotor didn’t move and the screws didn’t break. But that should not happen in case of a correct setup.

The rotor is live on the site. Hope Rotor for Schlumpf Hub D203mm | Unicycle.com (UK)

I have nudged the price up a bit as it took considerably more effort (and cost, 3 sets of tools!) to put in the countersinks… those disc’s are tough! So price is £79.20

Any problems just ask before ordering (email or chat).

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For customers who are wanting me to bring to Grischa Muni Challenge in August, please email me on contact@unicycle.co.uk and I will give you a discount code to take off the shipping.

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Ordered :slight_smile:

ordered :grinning_face: