62mm vs 80mm vs rear disc - help needed from aero geeks

If you want specific data then you need to be more specific about the wheels you’re testing. A 80mm V-shaped rim with a 24 round spokes is going to test slower than a 60mm toroidal rim with 20 bladed spokes. A lenticular disc is going to test faster than a flat disc.

As for Swissside’s data comparing their own, presumable similarly shaped 60/80/disc rear wheel are in line with what a lot of tests show.

Proven data is going to be hard to come by. Wind tunnel time is expensive and companies are only going to publish tests that show their product on top.

I somehow gave you a hint about my DT Swiss Arc 1100 80mm (newer version with 20mm internal width) and DT Swiss Arc 1600 62mm (also 20mm internal width). But you’re right - I should have been more specific. Or… I should have made an asterix, that “please exclude the influence of a bike frame, tires size, hubs, spokes, rim-shape etc. All I’m interested in is a depth variable.”

To the other point about companies publishing tests - don’t you think that Swissside didn’t make the best job at marketing here? If somebody new enters the page and sees “I can buy a disc for > USD 2000 and it will make me 35 seconds faster over an IM distance compared to my 80mm/80mm”, then it’s not an appealing advert. This is why I was curious about some real life data, or at least some tests at different average crosswind angles.