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Light Bicycle

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Reply with quote  #26 
Hi RideMagnetic, 

Sorry for the slow reply here - I haven't forgot about your question but am just doing some digging in to our old product lines to make sure you get the detailed answer you deserve. 

Cheers, 

Light Bicycle
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Light Bicycle

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Reply with quote  #27 
Quote:
Originally Posted by Volsung
Are the nerds developing featherweight fat bike rims for us too?  That's something I could get behind.


[smile] I guess only time will tell! 

(Yes, we are working on some new fatbike rims using different more lightweight construction. It won't be exactly the same as the flyweight construction, but it should a significant amount of weight off the existing rims)

- Light Bicycle
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ridemagnetic

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Reply with quote  #28 
Quote:
Originally Posted by Light Bicycle
Hi RideMagnetic, 

Sorry for the slow reply here - I haven't forgot about your question but am just doing some digging in to our old product lines to make sure you get the detailed answer you deserve. 

Cheers, 

Light Bicycle


Had to give this one a bump, since these very questions I posed about PSI and KGF have come up a few times just in the last week. Looking forward to getting this sussed out.    

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Light Bicycle

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Reply with quote  #29 
Quote:
Originally Posted by ridemagnetic


I'll use the RR36C02 rim for an example. 

So the hookless version is rated for 40psi max. But just 3 years ago you had a rim with almost the same exact dimensions, also hookless, and same T700 carbon. They're almost the same weight too. The designation was 20130813 25Wx35D and they easily handle road pressures. I built with a ton of those rims and people love them. Come to think of it there is a multiple Colorado State RR champ out there on a set I built for him that claims they're the best wheel set he's ever had, and regularly rides them in the 80-90psi range wrapped in 25c rubber. What changed to make the psi rating drop that much? And now the hooked version of the new rim is rated at 4x more than the hookless at 160psi. [head scratching] 

The max kgf rating is pegged at 180, a number you never see on a rim. Zipp is half that. The rest are averaging 120 regardless of material.


Hi Ride Magentic, 

Thanks for the reminder! I thought I had replied to this thread last week, but obviously it didn't post for some reason. 

Anyways, here I go with some answers for you. 

Hookless Max Pressure: You are correct that previously we had the hookless pressure on a similar (well, narrower RRU35C02) rim rated as higher, but we have moved away from that for a couple of reasons. One, as I'm sure you know, the pressure you can run a tire on a hookless bead depends a lot on what the width of the tire and rim are. In the future, we are planning on moving away from Max/Min guidelines and instead making a tire range recommend pressure guideline. The second part of this is that we have found that tire companies often don't manufacture tires to tight enough tolerances. While one tire may work great on a hookless bead up to 80psi, another tire the same brand and same model might blow off a 60psi. 

That said, the hookless bead use the same layup and resin process as the hooked version of the rim, so that carbon is capable of handling higher pressures. This is not the case for many of our MTB rims. The resin and layup on, for example, the RM29C06 Flyweight rims is designed for lower pressures and cannot be run at 80psi regardless of whether or not a tire will seat. 

Max KGF: You are right to think that that 180kgf rating is really high. That number is a holdover from the Chinese website that we didn't realize was still there. We would never recommend that you build wheels to 180kgf and we typically build our wheels between 110 and 120kgf. However, the 180 number is accurate insofar as that we have used that much tension on our wheels in testing and they are more than capable of handling it. That's to say you'll break spokes before you pull a nipple through the rim. 


Anyways, you are correct. We (the NA operation) are still in the process of changing a lot of the language on both sites to reflect what we as cyclists and wheel builders would actually recommend people ride at and build with. The current information on the website is not incorrect in any way it's just, as you've noticed, a little confusing to dig through. 

Thanks!



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ridemagnetic

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Reply with quote  #30 
I kind of suspected the technical writing may have been a part of the growing pains when East meets West in this fairly new business relationship. Thanks for clearing that up. That being said, it will be interesting to see what you guys will bring to the table here. The future looks bright. [thumb]



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SamSam

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Reply with quote  #31 
Does anyone know of any wheel builders in Europe that use Light Bicycle rims?
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oleritter

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Reply with quote  #32 
Quote:
Originally Posted by SamSam
Does anyone know of any wheel builders in Europe that use Light Bicycle rims?


I don't have an answer for you, but I suggest you join this group, and ask the question there. 

https://www.facebook.com/groups/bicycle.wheel.building/?ref=bookmarks

There are a fair number of UK and Europe based wheel builders that belong to the group.  Good luck.

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Knuckleheadmtb

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Reply with quote  #33 
I’m really looking forward to getting a set of RG922’s for my upcoming custom steel disc all road! I’d love to see more pics if you guys have them!
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oleritter

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Reply with quote  #34 
Quote:
Originally Posted by Knuckleheadmtb
I’m really looking forward to getting a set of RG922’s for my upcoming custom steel disc all road! I’d love to see more pics if you guys have them!
20180308_120819.jpg 


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