it won't help you carry more speed except that it will be TONS more aero because there is less spoke air surface and the nipples(super un-aero, brah) are closer in so have to travel far less distance through the air, so the total rotational coefficient of drag is reduced a noticable amount... in a windtunnel.

rotating weight doesn't help you carry speed, it just increases the momentum and friction forces acting on the bike. it actually decreases speed except when going downhill given the same legs pushing the bike and other forces acting on the wheel.

what really matters is that coefficient of drag acting on the wheel as a whole with air friction. the type of pants you wear has WAY more of an effect on the bike. I mean, orders of magnitude more.

a 30mm rim that weighs 400g will spin up with less energy or time than a 30mm rim that weighs 600g. same with a 40mm rim or 88mm rim, when it's just the weight changing in the same surface area.

except when gravity is acting as the primary force converting potential energy to momentum. didn't you ****s ever watch cool runnings?

because the more rim surface you have the less spoke surface you have, the deeper a rim, generally, the less energy it will require to keep spinning and the faster it will spin up to a certain extent. that's when you're talking surface area of 32 nipples 270mm from the hub vs. 32 nipples say, 250mm from the hub. obviously, a 30mm rim with 20 nipples is going to have less air resistance than a 60mm rim with 36 nipples.

why do you think people race TT and track with disc wheels? They're heavier than a low spoke count 30mm rim, i assure you... but it's not the weight that makes them fast its the crazy amounts of reduced drag you get from a wheel with no spokes.

people like deep v's on track bikes because they're stiff and strong and look good.

if you think heavy wheels take less to keep moving you're fooling yourself, that kind of comparison is worthless without factors like air speed, rolling resistance, gravity and slope/potential energy, and how much power you're putting through the wheel.

when it comes down to it, there's not much difference in any of this for most of our applications, it's all just what you like looking at. My dp18s were way stiffer than my r450, but come on, that's like comparing a camry to a smart car. comparing a b43 to a formation face is like comparing a 335i to a c63 amg. Yeah they're different... but not as different as you're making them sound.