Good that its being addressed as an issue now rather than a few weeks down the track.
Does the Zee Monster use the same bead profile?
All 36er tires have wire beads, so yeah, pretty much the same. And all 36er tires are made to fit any 36er rim currently in production.
Do all wire bead tires share the same bead profile though? Considering that nextie specializes in making bike wheels, I imagine that their engineers must have designed that groove for some kind of common tire bead.
All 36er tires have basically the same wire bead gauge. There are no “proprietary” 36er tires that only fit one kind of rim. It appears that all they did was take their existing 36er hookless carbon rim and added the hook, without increasing the height of the walls, which why only 3.5mm remains between the rounded hook and the rim bed.
I’ve been thinking about it, but I’m a little reluctant to try one when no one seems to have a good word to say about them. I’m a big guy, and while I don’t ride anything approaching extreme, I still ride off curbs and down small drops regularly. It’s something I was pondering, but with more thought I don’t think it’s a good idea. Thanks though.
Do they have a tire in place to check measurements?
I can add that my hookless Alchemist 36" carbon rim cannot experience any blowing as soon as I use a ghetto tubeless (tested with vee tire, KG). The only issue I experienced was completely cut the sidewall riding tubeless with a thin sidewall tire (KG ultimate) and low PSI. But that was my mistake, not a rim issue of any kind or a tire burping
I find that running the Nightrider tire at the max pressure of 65psi (4.5bar) on paved smooth surfaces rolls and turns easier then lower pressures. On shorter rides it makes little difference but on longer rides a freer rolling tire adds up.
With the whole reason of a lighter weight wheel to make riding easier, it simply follows that the tire should be ran at the highest pressure possible for the same reason.
I concur that higher psi = lower rr, and typically run 55-60 psi on my 36er for road riding, but far less for big wheel MUni. The last thing I’d want to be worrying about during a long 36er ride, let alone a century, would be having the tire blow off, especially at speed. A correctly hooked 36er carbon rim would go a long way in allaying that fear.
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What PSI will you use for a XC ride with the 36"? I prefer lower PSI due to never ride 100% tarmac, but always mix up with gravel and alike.
Maybe that is why I prefer 35PSI by far than 60PSI… different terrain from those riding only road.
For road use maybe I still prefer the inertia from an alu rim. I choosed carbon to better reactings in a various terrain ride, that is why I consider it more suited to a lower pressure than an alu rim
I emailed Alice requesting that the engineers base their measurements and testing on the nimbus nightrider tire since it’s probably the most common 36er tire currently in production. I don’t have experience with the few other 36er tire brands, but would expect that the hooked carbon 36er rim should be compatible with all 36er tires, just as every other 36er rim currently in production is. Will be waiting for her reply and will post it here.
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35 psi is around where I like it too. It does roll better on asphalt at 60, but it also bounces and absorbs bumps like a rock and since I’m always looking for a trail to ride on, I like the lower pressure even if it is less efficient.
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Does anyone think it would be worthwhile to start a thread on “Hookless rims and Tire Blow-off”? This would not be just for Nextie rims but any hookless rim (carbon and aluminum). The thread would solicit actual rider experience. It would request the following information:
- Tire make/model/size.
- Tube make/model/size, if applicable or tubeless setup.
- Rim make/model/size.
- Conditions when it happened like temperature, riding conditions (smooth pavement, rooty/rocky trail, doing a drop, etc.), and PSI/BAR pressure.
The intent is to potentially identify any patterns like suppose there have been 12 blow-offs with brand X of tube. That might be a red flag to avoid that specific brand of tube with hookless. Perhaps I’m being paranoid. I’ve had three street rides on my Nextie hookless 36er with no issues so far (including dropping off curbs).
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Keeping a list of blow-off’s seems good, but it would also be nice to have a list of non-blow-off’s so we know what has been tried and could be good for others. We wouldn’t want to assume that a combination is good just because it’s not on the list and then it turns out the reason it isn’t on the list is that it hasn’t been used much.
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@UniGeezer Do you know why the rim design was based on an internal width of 35mm? A width that in the mountain bike world is considered optimal for 2.6 to 2.8 inch tyres?
Did you tell her that all 36" tyres are 2.25" wide?
With this info, I would have thought that the engineers would have gone for a rim with an internal width of 28mm (like the braus rim), and with hooks as a bonus.
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I would expect that engineers working for a bicycle rim company would be familiar with the industry standards for bicycle tire beads. It’s a bit concerning to me that it appears that this may not be the case.
The wider rim doesn’t bother me as I believe the stealth2 rim is at least 35mm and it seems to work well with the nightrider.
As I understand it, unicycles in general use wider rims than bikes to give the tires more side stability, which is more important on a uni than on a bike.
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Yep. I prefer my Nightrider Lite on the Nextie than when it was on the original rim. It feels more stable and turning is easier to control - where it felt like I was falling into the turn before.
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I think UDC specs the Stealth2 rim as having a 42mm outside width. I’m not sure what that translates to in inside width, but I’d guess it makes it at least as wide as the Nextie.