Hey there!
I’m going to build a light 27.5" unicycle, so would like to buy a carbon rim.
I mostly ride XC, sometimes very light DH, no big jumps and drops. My weight is 75kg. The tire I’m going to use - Duro Crux. But maybe sometimes something more narrow for DH - up to 2.5-2.6". The running pressure will be relatively low for the better damping and traction, most probably will ride with TPU tube.
I am considering a choice between Nextie and Light Bicycle rims:
Nextie - NXT27XM46
LB - AM740/EN740
(or maybe you can recommend something else?)
Both are 40mm internal width (BTW, is this width a good choice for my requirements?), and both will cost me the same, but there are some differences:
- Nextie is 445g - sounds great, LB is heavier - 480g for AM version and 530g for EN version.
- LB has an asymmetric profile, Nextie does not.
Which rim would you choose?
And one more question - which spokes?
Thanks!
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Hi.
I have the light bicycle EN740.
I currently have a 2.6 installed on it and have no issues with the rim what so ever.
Light bicycle are very good with communication and very reasonable postage options.
If your mainly going to be using the Duro Crux I would personally go for a 40mm internal rim, as it’s a wide tyre
As for spokes light bicycle say they need to be no thicker then 1.8mm in the middle, so double butted spokes, I have used Sapim race double butted spokes 2mm thick at the hub and 2mm thick where it goes into the rim and the middle part is 1.8mm.
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So you think AM740 is not sturdy enough? What is you weight and riding style?
Nextie is a bit cheaper to buy in my country. It costs $240 incl shipping, LB costs $255
I just went with the En740, I mainly ride cross country, with a touch of muni, hoping to ride more muni in the near future though.
My weight is not the reason I chose the EN740 I’m way within the weight that Is stated plus it says on flat ground, when jumping over obstacles the impact is one that part of the rim so that’s another reason why I chose the EN over the AM
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15usd dollers is not a lot of difference. Personally I would choose LB over Nextie as you can customise the rim more and you can have a offset which will help to even out spoke length and tension.
I have never had any issues with LB rims and I have 3 of them
Nextie I had a 36" rim and the tyre kept blowing off it and so did others, there is a thread about this.
LB listen to the riders and have worked with top riders and they will be more then happy to show you the test results for the rim
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I built my muni with the RM29C15 rim from Light Bicycle. It’s a 45mm internal width and I run a 29x3.0 Bontrager XR2 tire on it. It’s a great rim. It built so easily, essentially no truing required.
I spent a lot of time consulting rim tire width compatibility charts before I chose my rim. 3.0"+ is almost always going be recommended to be on a 40mm or wider rim. 3.25" should probably be on a 45mm rim. I think it probably doesn’t matter as much on unicycles as it does bikes because we rarely get as leaned over and on the side knobs of a tire like a bike can. Therefore the ideal tire “roundness” probably isn’t as important. I would probably air on the side of running a wider rim with a more “squared off” tire profile because that will better support the sidewalls of the tire and reduce folding, which we do get when side hopping on a unicycle.
That said, a 2.6 is going to be awfully square on a 45mm rim. A properly sized rim for a 2.6 is going to be too narrow for a 3.25, and vice versa. I chose to go with a middle ground size with the 40mm/3.0 combo and I don’t feel the need to go larger or smaller on the tire.
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