Nextie 36" carbon rim

Unicycles and Equipment
364

I know that the lateral stability is particularly interesting for muni. For muni, it seems less problematic to me to use a rim that is a bit too wide as we will rather use low pressures.
But for the road, the specifications can’t be the same. It seems to me that the use of high pressures justifies paying more attention to the good adequacy between the rim and the tyre.

It’s not the holy bible, but I find the following table by mavic engineers to be an interesting insight into tyre and rim matching.

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For my road use, I just feel that the rim width has an impact on the tyre profile. The wider the rim, the squarer the profile, the thinner the rim the rounder the profile. I have always had a preference for round profiles on the road.

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365

I totally agree with you. I have tried to use a 2.5" Maxxis Grifter road tire on a KH Freeride rim - which is really large. That made a square tire that wasn’t able to turn sharply nor fast. I finally got back to a WTB Ranger Light 3" tire. It is way rounder and enables some sharp and fast turns.
So : use a thin rim if you like to turn. If you want to got straight and never turn, you can use a wide rim with a thin tire. :upside_down_face:

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366

Stealth 2 36er rim and Nextie 36er rim are both 42mm wide. I have no turning issues with the Stealth.

367

Depends on the pressure and it seems you are riding at very very very hight pressure so this is normal you have no driveability issue

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368

I wouldn’t say very high, for Road riding I usually run about 50 to 55 which is still 10 psi under the max. But the lower the pressure the more susceptible the tire is to camber.

369

Anything under about 40-45PSI would probably be considered to be unusually low with the NR Lite, whatever riding you’re doing.
The sidewalls start to get a bit too mushy for unicycling once you go below that (even as a pretty light rider myself).

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370

The vast majority of 36" riders I know in France use pressures between 40 and 45 PSI (ok there is a bias, because I could suggest this range to them) for use on roads, towpaths, cycle routes… For my part (70+kg ~160 pounds fully equipped) on dry roads, I can go between 45 and 50 PSI, but never beyond.
And I know someone who rides mostly off-road @haut-pin, he may be able to confirm this but I think he’s more like 30 PSI.

According to my scale: 45-50 PSI is high, 50-55 PSI is very high, 55-60 PSI is very very high, and 60 PSI + is very very very high (at this pressure, I consider that the blow-out is imminent, I leave the room and put a noise-reduction helmet). :sweat_smile:

I’m more of a KG ultimate user, but I’ve also ridden a lot with the nightrider lite. I don’t think there is much difference between the two.

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371

Hmm, max 40 PSI in the NR Lite for me (80kg). Any more and it gets unpleasantly bouncy on anything other than smooth surfaces.

I used to run the old NR at 50 PSI and didn’t notice any problems. I think the heavier sidewalls provided some damping.

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372

definitely!

373

My NR Lite is at 45psi, just checked. Lower than this, I don’t like how it “folds” or “collapses” into a (sharp) turn. On the regular NR, I could go down to 3° without unpleasant reactions during turns.
I ride mainly in town with my 36", and I’m 75kg.

375

I sent her an email a couple of days ago asking for an update and she said that the engineers are still discussing the situation and testing. She said at this point there is no definite time frame for completion so she is offering refunds for those who don’t want to wait. I told her I’m fine with waiting longer in order to get a well built, well tested rim. I would suggest that those who would like a refund, or to inquire with questions you may have, contact her via: brian@nextie.com

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376

I was contacted by Nextie last week regarding my experience with the original rim. They are putting in the effort to make this hooked version right

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377

From Alice this morning, 11.11.21:

<Hi Terry,

We must develop the 36’’ Hooked rim.

But since the machine is 1mx1m in size. If the rim lip needed to make a little higher, the machine is too small. A bit complicated.

I’ll offer you an update about the final time after 1 week. Is this good?>

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378

As mentioned before I am not a unicyclist. I checked back into this forum to see status of Nextie Carbon rim. I have seen the posts about a tire blowing off a Nextie unhooked rim by the rider that was utilizing a non-tubeless tire with a tubeless designed rim. This is not apples to apples and is the reason many of us are seeking a hooked rim. I have also seen the various illustrations of the Nightrider rim and the distance from the hook and how it compares with the proposed Nextie rim. I would say that the illustration is inaccurate. I have a Nimbus Dominator 2 -32er rim - which I am sure was designed to be used with Nighrider wire beaded tires. The distance from the hook is not 9MM. It is more like 5.5-6.0 mm when measured from the tire seating ridge. The tire seating ridge is unique to the Nimbus rim. To expect Nextie to develop a similar rim is foolish. Nextie probably produces many many more rims than Nimbus so how about we give them a little credit. I believe that the measurement offered in earlier posts was taken from the bottom of the Nimbus rim and not from the seating ridge. The tire does not seat on the bottom of the ridge - the tube does. I have experience with many carbon hooked road rims made by arguably the best carbon rim maker - ENVE. Enve recently has gone with hookless rims for most of their line up as they are making the move to all tubeless. With that said I have a spare hooked Enve rim in my basement. That rim has a 6mm profile from bottom of the rim to the top of the rim side wall. The Enve rim does not have a tire seating ridge, like the Nimbus Dominator II, and neither does Nextie. The middle of the bead seat on the Enve rim is around 4MM much like that of Nextie. Additionally when comparing beads on the Nightride lite with other wire bead road tires I have laying around my shop it appears almost identical. You cannot compare a nightrider rim with highly regarded carbon rims. Nextie has been making hooked and non-hooked rims for a long time so I think we should give them the benefit of the doubt that they know what they are doing. I am convinced that the Nextie hooked rim is going to work well with the Nightrider tire just as my Enve rim worked well with a number of different wire beaded road tires I used with it. I am looking forward to receiving the Nextie rims. There are risks with every new bicycle component that comes on the market. Early adopters are always those that are willing to take the risk of testing a new product that comes on the market. If any of you were uncomfortable with this risk then perhaps you should have waited until others could report their experiences before purchasing. I for one am going to let Alice know that I am good with their design and to ship when ready.

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379

Thank you, @Tsully2222 for sharing your insights, experience and opinion with us. I happened to find a working ↵ Return key on my keyboard and put in to use to make your lengthy contribution more readable for others, as follows. :wink:

As mentioned before I am not a unicyclist. I checked back into this forum to see status of Nextie Carbon rim.

I have seen the posts about a tire blowing off a Nextie unhooked rim by the rider that was utilizing a non-tubeless tire with a tubeless designed rim. This is not apples to apples and is the reason many of us are seeking a hooked rim.

I have also seen the various illustrations of the Nightrider rim and the distance from the hook and how it compares with the proposed Nextie rim. I would say that the illustration is inaccurate.

I have a Nimbus Dominator 2 -32er rim - which I am sure was designed to be used with Nightrider wire beaded tires. The distance from the hook is not 9MM. It is more like 5.5-6.0 mm when measured from the tire seating ridge. The tire seating ridge is unique to the Nimbus rim. To expect Nextie to develop a similar rim is foolish.

Nextie probably produces many many more rims than Nimbus so how about we give them a little credit.

I believe that the measurement offered in earlier posts was taken from the bottom of the Nimbus rim and not from the seating ridge. The tire does not seat on the bottom of the ridge - the tube does.

I have experience with many carbon hooked road rims made by arguably the best carbon rim maker - ENVE. Enve recently has gone with hookless rims for most of their line up as they are making the move to all tubeless. With that said I have a spare hooked Enve rim in my basement. That rim has a 6mm profile from bottom of the rim to the top of the rim side wall. The Enve rim does not have a tire seating ridge, like the Nimbus Dominator II, and neither does Nextie. The middle of the bead seat on the Enve rim is around 4MM much like that of Nextie.

Additionally when comparing beads on the Nightrider lite with other wire bead road tires I have laying around my shop it appears almost identical. You cannot compare a nightrider rim with highly regarded carbon rims.

Nextie has been making hooked and non-hooked rims for a long time so I think we should give them the benefit of the doubt that they know what they are doing. I am convinced that the Nextie hooked rim is going to work well with the Nightrider tire just as my Enve rim worked well with a number of different wire beaded road tires I used with it. I am looking forward to receiving the Nextie rims.

There are risks with every new bicycle component that comes on the market. Early adopters are always those that are willing to take the risk of testing a new product that comes on the market. If any of you were uncomfortable with this risk then perhaps you should have waited until others could report their experiences before purchasing.

I for one am going to let Alice know that I am good with their design and to ship when ready.

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380

Alice emailed me to say that they are going to order a nightrider36er tire for testing.

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381

The drawing with dimensions of the dominator 2 rim is here:

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The distance from the landing surface (ERTO) to the inside of the bead is 7.19mm on the production drawings.

Note the way that the bead is narrow in height. This is designed like this so that there is more space for the bulky bead while keeping with the correct ISA OD dimension.

I designed the Dominator 2 rim to fit the Nightrider tyre V1 when “the tyre guy” used to make them in Taichung. The Newer version of the tyre has a similar bead due to the manufacturing method used to make these tyres. These are very different for the vast majority of modern cycle tyres. These are no, and never can be, tubeless tyres produced without remaking all the tyre tools (I have discussed this in the past on the forum and have discussed with the factory several times) .

The Nextie rim is working on Tubeless dimensions as I explained earlier in this thread. Adding the bead where they have added it may work with modern tubeless ready tyres, but I do not believe it will be a good solution on the 36" tyres.

6 Likes
Game changer - 36er CARBON wheel!
382

Wouldn’t this be a good idea that you talk directly to Nextie about your concerns? That may lead to a great and elegant solution - if you have time obviously. You’re probably one of the guy with the most experience regarding 36" tyres conception in the world so that your experience would be really valuable.

383

Agreed. Except Roger has no direct interest in that. I don’t think they’re planning to sell carbon rims at unicycle.com

384

To be fair, unicycles are already a niche and carbon rims (& 36" rims at that) are a small niche within a niche, so there’s probably not a lot in it for UDC.

1 Like