Originally Posted by
tallbikeman
Your bicycle is hauling groceries which is a very unforgiving load plus you on there pedaling the hole thing down the road........ When hauling dead weight loads you are going to need much stronger wheels than even us Clydes normally run.
This is a really important point. That dead weight is “unsprung” and so every gram of it hits your rear wheel for every bump, pothole and kerb. Those Dutch style bikes also generally put your body back over the rear wheel too. If that is your case, then that is murder on the rear wheel. You can “ride light” and move your body around put a big part of it will still be adding to that unsprung weight.
Most other styles of sporting bikes spread the weight between the wheels as it assists handling. Perhaps you should consider ways to distribute your load better, and for the sake of your wheels, using your bike as more of a cart when heavily laden and just walk and push it along. Fatter tyres and lower pressures should also help you out to cushion the hits and give the wheels some relief