Hey Fellow Schlumpf users,
I have problems with the use of my disc and pads. Also just wrote a email to Florian. I used 3 pairs of brake pads and the disc is getting critical thin within 700 km on my tour (plus maxbe 70 km at home)
So just that you know. Hope noone is going on a big multiple hundred kilometer trip soon. If not make sure to bring a bunch of spare pads and a spare disc. And I also hope the problem will soon be solved.
Has anyone else encountered any non normal stuff concering the use of the brake?
I have no personal experience as my brake usage is beyond minimal. And my life situation means I not going on long trips any time soon (even if skill allowed!)
But I do feel I’ve got a handle on disc brakes a technology.
Be great to know what brake and pads you’re using?
I know there are rotors out there that say: RESIN ONLY PADS.
This I presume is due to the rotor not being tough enough for other compounds of disc brake pads.
Riding conditions could be interesting to throw into the mix. Is this holding the brake on for long long descents or small pulses? Why am I asking? I know that heat is what kills pads so would be interesting to know if they’re getting massively hot.
All this being said, it doesn’t sound like things are working as we’d expect. Really do hope Florian can reply to you with some kind of answer too.
Great that there are riders out there putting the hub through its paces for the benefit of fellow owners
One idea might be to find these finned brake pads for your brake.
This is the one for my Hope E4s and the pads look to be rotor friendly - which would mean not too hard wearing. But the main benefit of the fins would be the reduction in heat.
I know from our heavy cargo e-bike we chew through disc pads on a couple of monthly basis. But that’s due to its heavy weight and going down hills at 20mph while using steady braking.
With a unicycle and a 180 rotor I’ve no technical idea how hot the discs get but I suspect the friction build up could be considerable.
The main question is what kind of metal hardening these schlumpf rotors went through if any.
To my eye on initial review they looked very high quality and of a decent thickness. But looking at a Shimano rotor I have pending its install on a BrakeFast build its metal has a “feel” of being harder.
I do wish there had been the BrakeFast approach taken with these hubs where we had an adapter that bolted to the hub as the current rotors do, with then fastening points to attach the confiscated rotor edge part of a high quality Shimano rotor. We’d also have bike shop purchasable rotors too.
Mmm perhaps this is a CNC protect that could be made via some basic CAD work using the current rotors and the one used by BrakeFast set ups
Shimano rotors we use for BrakeFast are made of 3 sleeves of different metals: one sleeve of aluminum between two sleeves of stainless. That’s known as Ice Technology.
I’ve still not got my hub - I’ll retrieve it tomorrow - but I’m pretty sure Florian have not done the same.
I’m not into CAD, but if any of you wants to go for that projects, I’d be glad to give it a test!
If someone gives me the specs of both bolt circles, I can probably make the CAD drawing happen quite quickly. (I don’t really feel like trying to measure it from pictures).
I’d be tempted to make it a lasercut steel part, since spacing the disc outwards is already necessary for some setups. Would be less pretty, but a lot cheaper than CNC milling.
I have both the rotors but yet to remove the edge section from the Shimano one.
Getting the official file for that would be harder than one for the Schlumpf rotor.
I will see if there’s a way to ask for the Schlumpf rotor’s design.
As for the Shimano one what kind of measurements / details would you need?
I could happily send you both items in the post if physically having them would help.
I like the idea of an adapter cut from steel - with holes drilled to then bolt on or secure with rivets the Shimano part. It could provide a very nice option where you know you can buy an off the shelf rotor and the only hassle is removing its centre section.
Had some spare time, so I drew up a quick prototype version (I found the dimensions for the shimano rotors on the brakefast documentation), that someone could 3d print to check fitment. As a final piece it could be lasercut/plasmacut from steel (definitely strong enough), or aluminum (maybe not enough thickness to be strong enough).
I would probably just nut and bolt (m6) the connection between the icetech disk and adapter, since there is not really enough thickness for tapped holes.
Maybe someone from this forum could contact Brakestuff to get some info about the cost of discs for our new hubs? So that they don’t receive many messages
I’ll happily do that once I’ve sussed out the options for an adapter.
I would have to get hold of a full CAD file of the current rotor from Florian with his permission to be able to them go to then I feel.
Or perhaps just the specifications for how it mounts to the hub would be enough.
They look like lovely brakes and it’s nice that such a company exists to cover this kind of need.
I still suspect that for 95% or new hub users the current rotors will be fine. But I still like the idea of using something 100% suited to disc brake wear and tear.
I edited the .step file in my original file to make a cosmetic change (the outer cutout pattern somehow moved and was irregular in the original file).
Also made a drawing, so if someone has a Schlumpf hub and a 203mm Icetech rotor, they could print it, cut it out and check fitment. Make sure the print is actually to scale if you do that, it’s not uncommon to encounter some border settings at the printer messing with the scaling. Schlumpf to 203mm shimano icetech.pdf (33.9 KB)
My main area of concern is the inner interface, since I recreated that from a picture.
(P.S. Any engineers out there, please don’t judge this technical drawing, I am aware that it’s not really up to standard and not properly dimensioned at all.)
Has anyone already calculated how long should the spokes be for the Braus rim/100mm 2022 Schlumpf hub setup?
Here’s what I find, but I’d like a double check:
Thanks! My local Unicycle shop seems to have thois size. My wheel will be easy to build, then. The hard part for me will be to drill my frame. I’m afraid of doing it wrong
I think the Dishing Offset should be about 8mm rather then 16mm. At least that is the difference (from this drawing) I get from the center of the flanges to the center of the bearings.
- but I’m pretty sure Florian have not done the same.
