4. TReGo bike trolley
This green-minded gadget upgrades any bicycle into a cargo bike. The trolley attaches with a patented fast connector, replacing the regular front wheel. Remove it at your destination to serve as a rolling shopping cart holding up to 50 pounds. It’s expected to go on the market by summer 2018.
The same company also is developing a towing cart kit, sort of like a little red wagon that attaches to the back of your bike, for toting heavier loads.