Shush! It’s been a few days I’m thinking about ordering a 125mm hub to make thinks easier… I’m also wondering whether I should finally get a V-frame from Flansberrium. Spoiler: I’ll get a V-frame. So, the next thing is: should I order it with 125mm bearing distance? So much things to think about 
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This wouldn’t be with a Braus rim right though? No 32h option in the 125mm sizing sadly.
I can fully sympathise with this 
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I forgot that point. Thanks for the reminder! That’ll cost way less, then 
And, I definitely need a 220 rotor 
In the meanwhile, I’ll probably send a message to @jaco_flans
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Convince me – 203 or 220. I have absolutely no spoke clearance issues. 125mm hub, 29" wheel, and 6mm rim offset to compensate for half of the hub offset.
The 203 should directly replace the Schlumpf rotor. Is there any advantage in going to the 220? Of course if your custom order is for just one size, none of this matters, I’ll take the consensus choice.
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I think the safe option is to use 203 for anyone not facing clearance issues.
220 is for those facing clearance issues or for shall we say “power users” that perhaps want the possibility of the best braking power. (But this is a bit speculative at this stage.)
I hope we can get two sizes made -
It may be the 203 comes as a direct copy of the schlumpf design (once we know that this is good for use using the BrakeStuff hardened metal.
220 would be designed as asymmetrical.
There’s an outside chance we could get both 203 and 220 designed in a new asymmetrical way. Not personally sure how complex this would be for BrakeSTUFF but I already feel this would be my ideal option. Here’s hoping if the energy goes into making an asymmetrical 220 that downsizing that design to 203 wouldn’t be too much extra time invested 
*My only background concern re the 220 size is that this might introduce its own set of problems due to being a bit bigger than the biggest rotor Florian offered - not much bigger I’ll admit, but still. I don’t think it would put any greater strain on the mounting interface but that’s a small area of unknown I have lingering in my mind.
I second @mindbalance. If you don’t see the advantages 220 could offer you, then you probably don’t need it. To be honest, the only 220 rotor I’ve ever seen on a uni was Florian ‘Freewheel’ Kaiser’s. As you want maximum heat dissipation on a freewheel, it makes sense to go for a 220 rotor there (but be aware your frame may not like it ).
Concerning my case, I have issue on spoke clearance on my G36. I can’t make the spokes clear enough from my caliper. So they sometimes hit 
I also think I could benefit from a bit more power and heat dissipation when going downhill at 35+ kmph. But I don’t think lots of people go that fast during long downhills!
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Count me in for a 203mm rotor.
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Small update.
Installed the 203 rotor from BrakeStuff on my G24 wheel.
It’s test-able for sure but the glove fit we get with a rotor from Florian isn’t there by about the thickness of a piece of paper.
I think we can solve this so I’m not worried for final rotors but it isn’t “perfect” - yet.
I’ve slid the rotor towards the side where any braking forces would wish to shunt it and tightened down the screws.
Hope this is safe. I think it is - anyone have any thoughts on the power the 9 bolts have in holding it in place?
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I may be wrong, but I don’t think it’s a problem. With the 9 screws, it shouldn’t move anyway.
It seems to me that most bicycle disc hubs don’t have this type of lock, don’t they?
On reflection, I’d have to build my wheel with the schlumpf disc, at least to check that there’s no conflict with the spokes with the brake caliper and the 203mm disc.
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Got a reply from Florian! New rotors with different material on their way 
Dear Maxence,
thanks for your comments and your feedback!
You are the second rider who reports an overheating of the rotor at long down-hill rides.
We tried to choose a similar material as other disks may have, but in the meantime I’m not so sure if this was the best one.
We therefore already ordered a new batch of diskes made of a special stainless that allows heat treatment and a hardening process, which most of stainless steel qualities don’t allow.
We will have available these disks in a few weeks. Hope your current one lasts that long!
Best regards
Florian
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So good to hear this. If we can tip him over into making asymmetrical rotors and a 220 then I needn’t have bothered with investigating BrakeSTUFF rotors.
I’m happy for those that get rotors replaced with the better ones.
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I don’t think the design has changed from the first version. My bet is they will be the same, but in another material. We’ll have to guide him to make those asymmetrical rotors! About the 220, I’ve asked him if it was in his plan. Let’s wait for a reply!
Last but not least, I’m not sure the old rotors will be replaced for free. I guess we’ll have to pay for them.
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It would be a warranty replacement or I’d be very puzzled.
The bending ones aren’t being bent by user error.
I’m a huge fan of Florian’s work, but issues that are down to manufacturing sit within the 5 year warranty I’d say.
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Does riding the uni count as a user error? 
I hope you’re right!
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It would be more efficient to let him know about Brake Stuff and the testing results when available. After all, Florian is good at doing hubs and can simplify his logistics by relying on a partner good at making rotors 
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I have highlighted my endeavours with third party rotors, so he does know about BrakeSTUFF - and the logic for going asymmetrical.
But I think he’s going to move forward with his new metal usage.
And then I’ll see where we get with asymmetrical designs in both 203 and 220.
Heat treated metal may resolve 90% of the warping and wearing issues…
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Deleted. This was clearly overly complicated and not a welcome idea to the forum 
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I added my “count me in” because conversation in the forum seemed to indicate consensus had been reached. Now we’re sidetracked with floating disks. When the half dozen of members who have experience and conviction again reach consensus, please simply state the recommendation, I will again say “count me in”. I don’t think price is a barrier to anyone. 10% of the hub cost should cover the fanciest bead blasted hardened stainless floating titanium centered, yada yada yada rotor out there.
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I’ve been following the discussion but I don’t understand why I have to choose yes or no for “countersinking”. Does it matter? Are we talking about the screw holes?
And what is the axis of symmetry? I didn’t understand what symmetry was meant…
I agree with @gmerick that most of these questions need to be agreed on the forum.
I’d be very happy to have a disc in good quality material.
I may be wrong, but I have the impression that the rest is more a matter of detail.
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It’s solely to try and have some numbers behind this to motivate the powers that be to make said rotor.
It may seem overly prescriptive - in which case there’s always the option to just disregard and ignore.
It’s all probably an irrelevance ultimately and just my personal approach / belief in the need to gauge and organise things - but being human I could have got this completely wrong and perhaps should have just let things flow along and go where the perceived consensus was.
The tick for countersinking was solely to work out if this needs to be a consideration.
Non-fixed hubs may benefit from not being countersunk in the rotor holes, fixed hubs will basically need the countersinking.
Symmetrical design as how the rotors are currently set out, whereas asymmetrical would be a new ground up design - probably something like this:
The benefits of going asymmetrical is that there is an improvement to how the rotor’s metal expands as it heats. Symmetrical ones tend to warp - but again there may be the view that it is safer to stick closer to what Florian created so the idea was to let people select what they felt was best.
I should mention that if there’s any sign of annoyance or people being irked by the project - I’ll drop the sharing of my progress with it and it can be something people just handle individually as they wish.
The sole desire to try and organise was to benefit unicyclists with these hubs, and came from a good place - but equally it isn’t devoid of effort, time or energy that I could possibly put to use elsewhere, in perhaps more appreciative spaces.
(If I’ve misread the room and mood music, please say!)
Edit: decided to just delete the Google form posted above. No point is wasting time with it!
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