If you are looking for more lateral stiffness, you should be looking at wheels with MORE SPOKES. As Dave said, you will not notice any difference going from 18mm to 20mm.I'm thinking more about lateral stiffness in the wheel, and of course finding a wheel that is most suited to the 28 tires.
I've looked at the carbon wheels available, and they are wider for sure; but I'm not wanting to spend that much more, and I don't trust them for longevity.
As Lom says - get more spokes............and choose hub flange spacing wisely.I'm thinking more about lateral stiffness in the wheel, and of course finding a wheel that is most suited to the 28 tires.
If you ever think about any carbon rim - read November Dave's blog posts about them first.I've looked at the carbon wheels available, and they are wider for sure; but I'm not wanting to spend that much more, and I don't trust them for longevity.
The OP stated "I'm thinking more about lateral stiffness in the wheel". You told him to consider more spoke, and I agreed.. Are we in agreement that the further apart hub flanges are, the stiffer the wheel, laterally? This gives a wider base to the hub/spoke/rim triangle. And the wider the base the more stable the pyramid yes? But the DS flange, due to the fact that its distance from the hub center line is more or less defined by cassette width, is kind of chiseled in stone, give or take a couple of mm.Not sure I understand what you mean here, Mike. Could you explain?
Ahhh, yes. Larger flanges make for a stiffer wheel (in theory), but then you have more unequal DS and NDS tensions. Some narrower wheels have OC verisons, but this presents other issues. I do remember a wheel builder on this forum who claimed he has seen that OC rims are more prone to spoke hole cracks.So due to cassette clearance, disc location, narrow flange spacing (read: pyramid base width) we're left with a fuster-cluck of pyramid base width and base spacing (relative to rim c/l - hence the upsurge to OC rims).
So my comment "choose hub flange spacing wisely" stands but it would take an engineer to find the definitive hub spacing from all the hubs available.
But maybe, just maybe, all available hubs are good enough.
I'll bet if you asked all last weekend's Paris-Roubaix pro racers and most of their mechanics what their rear hubs' geometeries were, they would almost all go "Huh?"
Yes, more stiffness is what I want, I think.A question for the OP: I think your first post led us to believe you were looking for something that rides less harshly. But it appears you are more concerned with stiffness (stability?). Am I right? If it is stiffness and a more stable feeling you are concerned with, I am thinking a deeper, not a shallower rim is the way to go. If you look at the dimensions of your Velocity A23s, you will see they are already quite shallow - around the same depth as most box rims! In the excellent detailed rim review below, you will also see that the A23 did not get a very good stiffness review:
Alloy Rim Roundup - Fairwheel Bikes Blog
I am thinking two words - WIDER TIRES. If your bike frame will fit 32c tires or even 35c tires, go in that direction.Imagine coming down a steep (10% grade), bumpy descent, with washboards and potholes to avoid, and entering a corner where the vibrations threaten a shimmy. That's the worst case of the roads I ride. Many of the roads are also chip seal, with 1" minus, and patches of dirt/gravel.
I'm also addressing the tendency to speed wobble on these uneven surfaces. Without the wobble, I would probably not be looking for a change--just dealing.
Looking at the link to "Alloy Rim Roundup" reinforced my idea to look into the DT Swiss RR440.
My track bike wheels - early '70s vintage Campagnolo Piste large flange track hubs, 36/36 spokes with (cough) Mavic Open Pro rims. I won't tell you that they're tied & soldered too as I don't want WW111 to kick off. No flex in those babies!So in the end, if you want wider flange spacing, get a single speed?
You should be aware that a few years ago, MAVIC built a number of wheels with significantly different lateral stiffness and asked riders to evaluate them. No one could reliably tell the difference. All the advice you have been getting is right - focus on supple tires with lower pressures.Yes, more stiffness is what I want, I think.