Apidura Backcountry Long Top Tube Pack 1.8L vs Blackburn Outpost Top Tube Bag
Two top tube bags, measured against each other on the figures that decide whether they work on a bike.
The short answer
The Backcountry Long Top Tube Pack 1.8L takes capacity; the Outpost Top Tube Bag takes weight, price and value per litre. 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 4 things we can measure come out differently.
Capacity
0.9L more in the Backcountry Long Top Tube Pack 1.8LThe 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.
Weight
140g lighter on the Outpost Top Tube BagEmpty 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
$76 between themManufacturer's price as we hold it.
Per litre
$22.78 per litre between themPrice divided by the maker's capacity. A crude measure that still catches the case where the dearer bag is also the bigger one, which the price alone hides.
Side by side
Including the rows where they are level.
| Apidura Backcountry Long Top Tube Pack 1.8L | Blackburn Outpost Top Tube Bag | |
|---|---|---|
| Capacity | 1.8L | 0.9L |
| Weight | 200g | 60g |
| Price | $111 | $35 |
| Per litre | $61.67 | $38.89 |