For big grocery trips I'll use my car. But I can comfortably carry four bags of groceries using a bike rack and two large pannier bags. My bike is nothing fancy

For big grocery trips I'll use my car. But I can comfortably carry four bags of groceries using a bike rack and two large pannier bags. My bike is nothing fancy, either. The whole thing (bike, rack, panniers) is under $1000, and just uses leg power. If someone wants to haul more on a bike, there are solutions out there.