Blackburn Outpost Seat Pack with Drybag vs Topeak BackLoader 10L
Two seat packs, measured against each other on the figures that decide whether they work on a bike.
The short answer
The Outpost Seat Pack with Drybag takes capacity; the BackLoader 10L takes how far it reaches back, weight and price. Which of those you care about depends on the frame you are fitting it to.
Assembled from the differences below rather than written over them. Every figure is a published measurement or computed from one — nobody here has used either one.
Where they differ
4 of the 6 things we can measure come out differently.
Capacity
1L more in the Outpost Seat Pack with DrybagThe maker's own figure. Worth reading alongside the dimensions below rather than on its own — two bags of the same litreage can want very different frames.
Reach behind the saddle
2cm shorter on the BackLoader 10LLength is the lever arm on the seatpost, and the longer lever is what makes a loaded pack sway. Shorter is easier to live with; longer usually means more volume. It is a trade, not a fault.
Weight
20g lighter on the BackLoader 10LEmpty weight as published. Worth holding against capacity rather than alone — the lighter bag is not the better one if it carries a third less.
Price
$10 between themManufacturer's price as we hold it.
Side by side
Including the rows where they are level.
| Blackburn Outpost Seat Pack with Drybag | Topeak BackLoader 10L | |
|---|---|---|
| Capacity | 11L | 10L |
| Reach behind the saddle | 52cm | 50cm |
| Depth | 22cm | 22cm |
| Weight | 450g | 430g |
| Price | $80 | $70 |
| Per litre | $7.27 | $7.00 |