I rode 7000 km on Fulcrum Racing 4 DBs (that's the disc brake version) before replacing them with Light Bicycle R45s, now they get used as spares.
They are good wheels, sturdy and ride well. I rode them on road and some light offroad on 23/25mm GP5000 tire combo and they are as true as they were on day one despite not being
really pampered. Somewhat aero, too. Bearing adjustment on the hubs is easy and the hubs are super smooth.
Caveats, they are somewhat aero with a 23mm GP5000 front tire which sits almost flush with the rim, the 25mm bulges out some and that basically ruins the aerodynamics, and a 28mm would predictably bulge out a lot (5000s are also pretty narrow tires) where it would be unsightly, even. Secondly, it is twichier in crosswinds due to V shape than a, say, 45mm U shape rim or a shallow alloy rim. You notice it, it's not terrible but it's felt.
It's also a bit on the heavy side, but it's what also makes it sturdy if you are a wheel destroyer. It feels like a very rigid wheel. I'd recommend it as a budget wheel, for sure (although with discs there's not much reason not to go for carbon): it would be pretty awesome if they had put bladed spokes on it.
Last edited by Branko D; 09-22-20 at 01:11 AM.