I mean if you donāt like them, donāt print them and ride them?
Heās offering files, not a finished product
Personally I trust my printing skills (probably not basic pla) to hold up just fine
Once you start getting into more exotic materials like nylon, pacf, or pccf, the hub price nears Rockstar 2ās. I think petg is plenty strong enough, although I may test out a set using pacf as well
As for regular pla, I donāt think itās resistant enough to heat to run, especially in the summer
Tanuki is selling the files though, right? Itās not like an open source project?
IMO itās an awesome project, but worth having a conversation over how safe 3d printed hubs might be.
What matters is the ratio, not just the pulley size
But BNM1 drives use 50T for the 2.78 ratio version and those are quite popular.
The main desire of Kegel is gear drive or DD ā2 in 1ā builds
As I already said, I encourage product discussion in this thread, and I donāt see this as āshitting on itā at all.
That being said, I included several warning in the op, including ones about prolonged UV exposure, high working pressures and sudden failures.
But I also think that 3D printed materials are severely underestimated here. Every material has its limits, and every material can be engineered to work for a given application (with constraints of course). I think I have found a good balance in this case here. The only risc factor that remains (if you follow all recommendations) is long term use over several years, which is not easily testable by me and is a burden the buyer has to carry.
What I do here is offering a blueprint for you to use. Which in many ways is more than any other manufacturer will ever do for you, as you not only get the product, but also instructions on how to replicate it yourself. This is not a one-time product like it is when you buy a set of hubs. This is freedom, if Iām allowed to be a bit dramatic here. Which naturally also comes with more responsibilities, as now youāre the one deciding over critical components.
This is also as open source as it gets for me to still get (not really :D) compensated for the time. I mean youāre literally getting the files, and its not exactly a secret how to modify .stl files.
So, in essence, saying that this is too dangerous of a project is kind of missing the point, as @ShutterShock said. I only sell a set of instructions, what you do with it is very much up to you. If you feel that this is too dangerous, that only means that this isnāt the right project for you. Luckily there are many other options from many experienced manufacturers available out there.
This is very much a DIY product, and as such are the benefits and the riscs. Please keep that in mind when discussing here. 
Sure, and I agree - but I think maybe it deserves its own thread so we can keep feedback about these specific files / hubs in here.
It would be interesting to get some real testing done of these versus rockstar 2 hubs and see what it takes to break each of em?
If someone wants to do it, Iām all for it.
Iād watch that rbemotion video!
Haha you really did get me thinking by mentioning it
I should do it project farm style and try to break stuff - sometime in 2024ā¦
Iām kind of joking, but it sounds fun
Just so you know itās easier to break the bearings in a Rockstar II than the hub itself
I got a ātotaledā Comp 95 board that crashed at 30 mph, and the bearings exploded and bushings were deformed, but after a new set of bearings and bolts the hubs ran true
I believe it haha those nylon hubs are tough. I donāt even know if it would be a fair comparison
Oh absolutely not, Rockstars will hold a lifetime of abuse, I donāt think it would be safe at all to ride printed hubs off road
Hm - I suppose that would subject them to more impact. Iām not convinced they arenāt good enough just yet.
As soon as I get the time Iāll put some work in on them - the looks are enough for me to want to attempt it.
FWIW Iāve taken my own 3D printed hub design of the 8x3.5 tires to 30+ so far and jumped on them a bit and they didnāt break, even with standard PLA. Granted it was not hot outside, which I have started to learn is a major failure point for PLA.
They are massive rims though so I was surprised they didnāt even have stress breaks. I broke one of the lips, a small part of it, while jumping off stairs with them. But that showed infill behind, where I only had used 40%. So anyways, Iām just saying, people tend to write off 3D printing without actually fully knowing where its shortcomings are
If heat is an issue then geardrives might be a problem
Depends. I have gear drives so we will see. My actual gear drive body doesnāt really get over 60c though so Iām not too worried.
Why? I donāt think Iāve ever had my gear drives get even warm.
Depending on the design a GD will have a substantial amount of thermal transfer to the adapter plates, no guarantee but itās an increased risk of thermal degradation over belts and chains, plus a GD is stiffer than belts and chains with more inertia so more stress on the hubs
I would argue that a proper chain or belt setup will have barely any difference to gears in terms of stiffness
But ya it is possible that it could be a problem, we wonāt know until its tested though
Iām mostly looking forward to the insane torque possibility of 6 inch tires on my 5.2 GD lol
The shock delivered is the same on belts vs chains vs gear drive. There is no relevant difference in āstiffnessā in this application, only in strength.
If your gear drive gets hot enough to soften PLA or PETG you should use a better lubrication compound, or adjust the gear slack. This doesnāt account for motor heat though, but if your motors are hot enough to overheat your gear drive youāre reaaaally pushing them to the limit. Also, this is not a problem if your geardrive uses carbon as a base plate.
Regarding Rockstar IIās, my designs have a lot more āmeatā on them to mitigate the difference in specific strenght. 
I like the hub design but am reluctant to use any material that can break down with UV light exposure. Are there any materials which are UV resistant that the hubs can be printed in? Thanks in advance!
