For this reason, Spank communicates ERD without including nipple head height
This is problematic as they’re calling their rim spoking diameter ERD, and adding “++” to suggest that you need to add the spoke nipple head dimensions to that. As much as I wish it, ERD is not the rim spoking diameter, and trying to change the definition now would cause far more problems than it would solve.
Calling it RSD and explaining what that is would seem to make far more sense.
Yes, I did include 3x pattern in my request. This was their reply, which is wildly longer than the UDC UK spoke calculator gave me.
Alice also sent me the updated profile drawimg for the hooked rim. I inserted the original prototype on the bottom right for comparison. You can see there is a slight difference in the rim channel: it’s a bit wider and now has slightly raised points just above the channel, and the vertical walls below the hooks appear to be more squared. The dimensions remain unchanged.
Well, it doesn’t help that they’ve made quite a big mistake on the calculator…
As I said before, they’re only going to throw it into a calculator (incorrectly in this case) rather than actually being able to confirm anything.
The updated drawing doesn’t fill me with confidence, as the ERD is the same, the BSD is the same, and the wall height is the same, but hopefully the slightly higher looking bead lock and the hooks will do what we need them to do.
You can also contact Alice before the rims ship and request a refund.
UDC
I won’t go into detail of why they’re different but it’s down to a small factor added to the calculations UDC use. Presumably it’s the right thing to do as lots of calculators do the same 
Yep, that’s the same result I got using the calculator.
Based on their assertions that it’ll be all good, and that it’s in their best interests to produce a product that people actually want, and the fact that others have had positive responses around asking for refunds, I’m happy to sit tight and see what happens right now.
If I have problems that cannot be resolved then I will deal with it then.
On the advices of our loyal fans, in May 2021 we NEXTIE tried to developed our first 36" carbon fiber rim, which is also the very first 36" carbon rim domestically. This brand new product won wide attention of unicycle field and the reliable quanlity gained highly appreciation from unicycle riders.
I hope that “tried” translates to “succeeded”.
I wonder if they would offer to swap the hookless rims for the new version…
Couldn’t hurt to drop them an email and ask.
I have zero confidence this will reduce the possibility of a blowoff - the wall height (or lack thereof) is simply too short for the bead to fit into. I just don’t see it happening.
Nope. Translates to “completely failed”.
I’m a bit more on the hopeful side. If things don’t work out, I’ll just request a refund and move on. But I’m at least going to wait until I have a chance to test it for myself rather than throw in the towel now.
I just sent an email to Alice requesting that they make a short video showing the nightrider tire being mounted to the hooked rim, and inflated to 60psi. Hopefully she will have that done and send me the clip. Not sure if that will prove anything but it would give us an as-yet unseen perspective.
From Alice this morning:
"Hi Terry,
No worries at all. We must do the test before we ship the rims to you all.
I have double-checked with our engineer, the max tire pressure for the Hooked 36’’ rims can reach 60psi. The hooked areas are no problem holding the tire bead."
And, regarding spoke length she said that she inadvertently juxtaposed the numbers and that corrected result matches that of the UDC calculator based on the same criteria.
Don’t really know what to make of all this, so I guess we’ll just have to wait to see for ourselves.
The answer is no, according to them the problems that occurred were only with tubeless setups. So just run a tube and it shouldn’t be a worry.
That is not really what has been reported here. Rowan reported that a Nightrider tire blew off the CF rim with a tube. He used a 29" tube but I see no reason to believe that would cause a tire to blow off the rim. 29" tubes have been used by many and if there was a problem with them it would surely be reported here. It has been reported that there is a greater chance of pinching a tube (during installation) with the 29" but that just results in leak, not a catastrophic failure with the tire blowing off the rim.
Time will tell how well the new and improved version of the CF rim works.
I am very curious to find out what tube they used. There’s only one presta 36er tube on the market that I’m aware of (Vee Tire) and it has a 40mm valve stem. That will probably work but you’ll need a very shallow pump head to inflate it.
