I want to buy a heavy 20kg bag of rice and bring it home.
The problem is that I only have access to a bike without any rack or formal way to store bags. The bag is too big to fit in my backpack. The distance is about 3km from the shop to my home.
I am using a Bixi (Shared bike in Montreal). There are stations near both my home and the store.
How can I safely carry heavy and bulky items on a bike without a rack?