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Black Diamond Speed 40 vs Zpacks Bagger Ultra 25L Backpack

Weight and specs compared for 2026 — and which one to choose.

Zpacks Bagger Ultra 25L Backpack is the lighter option — 815 g lighter than the Black Diamond Speed 40 (69% less weight). If grams matter to you, that is the one to beat.
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Spec Black Diamond Speed 40 Zpacks Bagger Ultra 25L Backpack
Weight 1,180 g · 1.180 kg · 2.60 lb 365 g · 0.365 kg · 0.80 lb
Brand Black Diamond Zpacks
Category Backpack Backpack
Black Diamond Speed 40
1,180 g

Lightweight 40L alpine pack with removable framesheet.

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Zpacks Bagger Ultra 25L Backpack
365 g

Ultralight day-hiking and short overnight pack in DCF. Minimalist design with padded back panel, sternum strap, and hip belt attachment.

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Black Diamond Speed 40 vs Zpacks Bagger Ultra 25L Backpack: which should you buy?

If saving weight is your priority, the Zpacks Bagger Ultra 25L Backpack wins — at 365 g it is 815 g (69%) lighter than the Black Diamond Speed 40 (1,180 g). That said, the heavier option may justify the extra grams with more capacity, durability or comfort, so weigh the trade-off against how you'll use it.

See where both rank against everything else in this category on the lightest backpack page, or browse the full gear weight database.

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