These are fantastic, super light for a mid aero 45mm profile, fast to spin up, no annoyingly loud free wheel, lighter than previous Firecrest that cost significantly more. Only complaint is no drain holes, but come Fall I will send them back to Zipp for the drilling of them through the fantastic service that Western Offers, newer lots, according to Zipp, will come with the drain holes. Note holes are 180 degrees from the install valve, ie across the rim if you are in doubt as to whether you have them or not.
Ok, so this may be premature, as I've only ridden these once, but I'm a believer. I bought these 3 months ago and it took me quite a while in this pandemic to source the correct cassette and rotors.
I went out with some friends today and they all thought i had a new bike. I set these up on my 2020 rounds with some tan sidewall Enve ses tires. The bike is ridiculously faster. Switching over from the stock dt Swiss (which are great for stock) wheels, it's night and day. For the price, your can't get a better wheel. Love the feel, love the look, love the sound.
I picked these up to replace a set of DT Swiss wheels that came with the bike; I'm looking to upgrade to a 2x11 setup and my old wheels were not compatible. I would rate them as being about the same; the weights of the two wheelsets were virtually identical. For a rim brake, they work well, as expected. They seem a tad stiffer than my original wheelset. The downside is the bearings don't run nearly as smoothly as the cartridge bearing in the DT Swiss wheels. The rims are great, I'm just not 100% sold on cup and cone bearings (I know, they're supposed to be better for lateral loads and more durable...). I appreciate that the new wheels came with QR skewers, valve stems to run the wheels tubeless (yes, the wheels are tubeless ready), and with two spoke wrenches (each wrench has two ends-one to turn the nipple the the other to hold the bladed spoke).
I have been using Rolf Wheels on my road bike for 15 years, I used the Rolf vigor on my road bike, they are fast and strong. I have hit potholes strait on before and never have any of my wheels come out of true. On the down hill extremely fast. Bearings are easy to service. One tip replace your bearings at least every other year or every year if you ride in the rain. I just bought the Rolf prima Hyalite for my gravel bike that I am building, cant wait to try them.