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Light Bicycle

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Reply with quote  #1 
Hi Riding Gravel! 

We are new to the Riding Gravel forum, but I wanted to let you all know that we are here to address any questions you have about our rims, our build process, the companies we build with, our warehouses (both Chinese and North American), our brand, or anything else that you are wondering about Light Bicycle. 

Over the course of the past year, we have set up a North American office and are now building and stocking gravel, road, and MTB products.

With that, I'll leave it up to you! As I mentioned before, if you have any questions or concerns about Light Bicycle, direct them to me and I'd be happy to help.
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widerisfaster

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I have a set of Light Bicycle RR36C02 Wheels. Ive had them about a year on my road bike, I ride road and gravel with 28C tyres, and they've been great.

I really like the specification of the  ENVE 4.5 AR wheels, at 31mm wide they provide better support wide tyres, and provide better aerodynamics transition from tyre to wheel for a 28mm road tyre. 

Do you have any plans to make a wider road/gravel rim, something 31mm wide, and also depth more than a MTB rim for aerodynamics?
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Light Bicycle

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Reply with quote  #3 
Hi Widerisfaster, 

Like you were saying, right now we have the 28mm wide RR36C02 (36mm deep) and RR46C02 (46mm deep) rims available as our aero gravel/cx options. We've also just launched an asymmetrical RG922 rims (29mm external, 22mm internal), but based off what you are looking for I doubt that is as deep as what you want. 

Those are the widest road rims that we have planned at the moment. Our experience is that unless you are running wider than 33c tires, having an internal width as wide as the new ENVE rims makes your tire shape into a bit of a cone and leaves it more susceptible to punctures. 

That said, we are always innovating and testing new products, so we are going to continue experimenting with wider and wider rims. As we get some more testing with wider products and get more requests for them from people like yourself, we might decide to add the to our lineup but at the moment we don't have any plans. 

Thanks, 

Light Bicycle
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widerisfaster

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thanks for the prompt reply.

The 28mm Continental GP4000 II in 28C measure 32mm wide when mounted on the RR36C02 rim. A 32mm tyre on a 28mm rim is not ideal for aerodynamics. I was running these tyres on stock 23mm wheels and have not seen any change in number of punctures moving to the 28mm wide rims. If that were an issue, other manufacturers would be having that problem, but 
Roval CLX 50 just increased the width to 29.4mm wide, DT Swiss new ERC1100 is 28mm wide, and Token just released 31mm wide wheels for gravel. 

Wider tyres on road bikes is a trend, as more people ride mixed surfaces. Trek Domane, Trek Emonda, Cannondale Synapse, Specialized Roubaix, BMC Roadmachine, and Scott Foil all have 28mm tyres on their their 2018 models. Even the race bikes such as Cannondale Supersix Evo, Focus Izalco Max, and and Specialized Tarmac now have clearance for 28mm tyres. The ride is fast and comfortable at the same time, so I expect there will be growing demand for aftermarket wheels to support 28mm tyres.

I think it is just a matter of time for other manufacturers provide aero wheels for 28mm tyres. I hope we see a Light bicycle rim with 31 or 32mm width, 25C internal, and 46mm depth some time soon. 

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TiGeo

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Reply with quote  #5 
I have the new LB RG922 gravel rims. Built up by LBS to 28h DT350s with the 54t ratchet upgrade. Sapim D Light spokes and alloy nipples. Sick. Ride is amazing. Maxxis 40 Ramblers set up tubeless sit just over 40 at mid-20s psi.

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Light Bicycle

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Reply with quote  #6 
Hi Widerisfaster, 

Thanks for all the information. I'll admit that creating a 30-32mm wide road rim wasn't on our radar for the next model year, but we'll certainly start looking into it a little more when add more products to the line in the 6-12 months. 

TiGeo, that build looks sweet! Thanks for sharing. 

- Light Bicycle 
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owly

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Reply with quote  #7 
Would a flyweight option be an engineering possibility for hook-designed gravel rim?

For example, I'm interested in the flyweight 650b XC rims currently on offer, for my gravel bike, but would prefer a hooked rim. 
If such was possible, what kind of weight would we be looking at for such a rim?
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TiGeo

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Reply with quote  #8 
Quote:
Originally Posted by owly
Would a flyweight option be an engineering possibility for hook-designed gravel rim?

For example, I'm interested in the flyweight 650b XC rims currently on offer, for my gravel bike, but would prefer a hooked rim. 
If such was possible, what kind of weight would we be looking at for such a rim?


The RG922s are flyweight constructed according to their site AND hooked....not for 650b not sure what LB has or plans on having but I see no reason they can't make a 650b RG922.
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Light Bicycle

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Reply with quote  #9 
Hi owly, 

The closest thing we have to the RG922 is the RG722 rim. It's a little bit deeper (36mm), but is made using the Flyweight construction process and also has a 29mm outer. Since it's a little deeper profile, it is the same weight as the RG922 (380g). 

The flyweight construction means that is uses a mix of Toray-700 and 800 carbon fibre. The Flyweights have a pretty unique mould and layup the reinforces the area around the spoke and valve holes, but tapers down to a fewer carbon layers in between the holes. This means the the rim is strong where is needs to be, but doesn't use extra carbon where it's not needed. 

You've probably noticed that the RG922 and RG722 are a little heavier than the MTB Flyweight rims. That's for a couple reasons: 1) added a hooked bead adds a little weight; 2) road, CX, and gravel rims need to be stiffer than a MTB rim; 3) the rims are made to handle a far higher pressure (100psi compared to 40psi) than the MTB rims, so they had to be made stronger.

With that in mind, would you be interested in a 650b RG922 (asymmetrical, 28mm profile, etc.)? Or does the current RG722 fit the bill? 

Thanks!

- Light Bicycle 
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owly

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Reply with quote  #10 
Light Bicycle,

Thanks for explaining the reason for those rims specs. Very informative.

I think I'll just stick with your current flyweight 650b rim for the time being. When I can afford it, I'd like an RG922 700c build also.

Now if I can just find an LB discount code somewhere![smile]
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