Blackburn Outpost Seat Pack with Dry Bag - Black YGroup_7033458982957 these cassettes are more reliable

these cassettes are more reliable

2 x EPDM mounting o-rings (Small)

plus a backup o-ring in each size

thanks to its burly 40mm stanchions

52 millimeters (integrated bearings) or 56 millimeters (internal bearing cups)

Blackburn Outpost Seat Pack with Dry Bag - Black YGroup_7033458982957 these cassettes are more reliableCan't fit a pannier rack but have cargo to load? Blackburn's Outpost Seat Pack with Dry Bag is the answer. This is perfect for those who are commuting or trekking on for an overnight stay. Mounted under the saddle rails and around the seat post, this bag is easy to install and secure. Keep your gear clean and dry with the waterproof and expandable bag. You can even mount a light to the loops at the back to stay safe. This is not recommended for those