Michael W.wrote a review of Mercury Wheels G3 650b Gravel Wheelset - Tubeless on June 20, 2019
Familiarity: I've used it several times
First 650b wheel set to try out on my Ti gravel bike and I'm impressed. I also have two high-end 700c Mavic wheel sets. One is light weight carbon with 28mm tires and the other Mavic Allroad with 35 mm tires. I'm running 42mm tires on this wheel set and now the other two wheel sets are not getting much use. I run Compass ultra-light slicks on all wheel sets. I love the way the bike comes alive with these wheels and they are very confidence inspiring particularly when working rough shoulders & rough roads, and dirt roads. I run tubes and haven't tried tubeless. I'm also impressed with the bearings as the wheels seem to spin forever in the bike stand. At 175lbs I run 35psi front & 40psi rear. I haven't noticed any appreciable speed difference based on my average ride speeds but I don't race. Overall, the ride is more enjoyable with these wheels, I seem to be riding longer and climbing easier too.