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DrBagg

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Reply with quote  #1 
Or ok? 🙂
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widerisfaster

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Reply with quote  #2 
Not too deep if you want the look of deep wheels, but if your tyre is wider than your wheel you are losing the aero benefit of the deep wheels. So without the aero benefit of a deep wheel, I would go for a lighter wheel which makes for better climbing. 
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DrBagg

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Quote:
Originally Posted by widerisfaster
Not too deep if you want the look of deep wheels, but if your tyre is wider than your wheel you are losing the aero benefit of the deep wheels. So without the aero benefit of a deep wheel, I would go for a lighter wheel which makes for better climbing. 


It's a wide rim (looks like a freaking mtn bike rim), weights ok 1550gr for the pair. $750 for the set. I might be on the heavier side, for much lighter, If any
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Volsung

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Reply with quote  #4 

If it's light and cheap, go for it.  Deep's not necessary imo though, so if you can go lighter and cheaper do that.

 

Unless you're fast and race and ride skinny tires.  Then aero is important.

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Mega Watts

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Reply with quote  #5 
I have roval sl 50's on my crux, that I use as a gravel bike.  rides nice, aero benefit, looks good.  biggest downside is cross winds.
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DrBagg

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Reply with quote  #6 
Quote:
Originally Posted by Mega Watts
I have roval sl 50's on my crux, that I use as a gravel bike.  rides nice, aero benefit, looks good.  biggest downside is cross winds.


That's what I was gonna buy...gor exact bike, and my Boone
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Mark_Landsaat

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Reply with quote  #7 
cross winds is a downside for sure, but if you are actually riding on gravel you will also give up vertical compliance. The deeper the section of a rim the stiffer it is vertically (suspension).

I know that the tire is the biggest contributor to comfort, but everything helps. The lower the rim profile the more comfort it will deliver.
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widerisfaster

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Reply with quote  #8 
Quote:
Originally Posted by Mega Watts
I have roval sl 50's on my crux, that I use as a gravel bike.  rides nice, aero benefit, looks good.  biggest downside is cross winds.


If you have 25mm tyres on the Roval 50's you will slip through the side wind.
If you have >25mm tyres on the Roval 50's, you will catch the side wind more, because the tyre is extending past the width of the wheel.
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ERQ

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Reply with quote  #9 
This is something I have been investigating/struggling with lately as well as I've been trying to figure out a wheel choice for a build I am just beginning.

So for max aero benefit, you would basically have to choose a tire size and then get rims that were that size or a mm or two wider (outside dimension) with an appropriate inner dimension, and then a 40 or 50mm U-shaped profile. I.e. a 40-42mm OD rim if you planned on running 40c tires?

I've never seen such a rim. I was looking at the Light Bicycle RR56C02 (30mm OD/23mm ID). This is currently a V-shaped rim, but they had been saying on their website that they would be releasing a U-shaped version in October. I e-mailed them yesterday to ask if this was still on track, and the representative (who to their credit replied super quickly) said: "According to our lab testing result, RR56C02 will be at it's the best performance with V-shape. So we won't launch a U-shape rim at the same profile any time soon." He referred me to a 55mm U-shaped road wheel of theirs, but it is only 25mm wide (17.9mm internal).

Let's say that the RR56C02 were U-shaped though. Widerisfaster is suggesting that it wouldn't be worth it if I were going to run a tire wider than 30mm vs. just getting a lighter rim because there wouldn't be an aero benefit. I agree that the aero benefit will decrease as the tire gets wider than the rim. But does it go to zero as soon as the tire width exceeds the rim width? Has anyone ever read/seen anything that tries to quantify this effect in such a way that we could compare it vs. lighter tires with much shallower profiles (say, Light Bicycle's RG922)? If I build up both of these rims with the same components, the deep dish rims end up 171.2 grams heavier. From what (little) I've read and understand about weight vs. aero, it doesn't take a whole lot of aero to offset 171.2 grams.

Anyway, this is getting long, sorry, but I'd appreciate any insight anyone has into this.

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