Originally Posted by
HillRider
Shimano GRX WH-RX570 wheelset in 700c or 650b (assuming your frame was sizes for 700c, not 26" wheels). Can be run tubeless or with tubes, They retail for about $450 and are perfect for your use. i have a pair on a Surly Midnight Special and they have been wonderful.
For under $600 this is likely your best bet. We happen to love this set of wheels and sell a lot of them for a decent upgrade in his price range. They are fantastic wheels and have Shimano warranty.
Wheel strength has gone up exponentially over the past 20 yeras or so to a point where even good tandem wheels are 28 and 32 spoke instead of 36 or 40 spoke to support over 400 pounds of riders and machine. You can get great wheels in 32 and 28 spoke count in this price range for your weight. check recommended rider weight limit specified by manufacturer for whatever you decide on.