Bike Bags Chrome or Timbuk2

Timbuk2 bags can be used on both shoulders. Wearing a big heavy bag on one side only will give your back gyp.

a bag with a poor strap like the Timbuk2 will give you pain on your shoulders, having a strap that support the bag properly on your shoulder is better than having a bag that can be use for both shoulder, an example of a well-design strap;