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Black Diamond Speed 40 vs Durston Gear Kakwa 55 UltraGrid Pack Small

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

Durston Gear Kakwa 55 UltraGrid Pack Small is the lighter option — 360 g lighter than the Black Diamond Speed 40 (31% less weight). If grams matter to you, that is the one to beat.
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Spec Black Diamond Speed 40 Durston Gear Kakwa 55 UltraGrid Pack Small
Weight 1,180 g · 1.180 kg · 2.60 lb 820 g · 0.820 kg · 1.81 lb
Brand Black Diamond Durston Gear
Category Backpack Backpack
Black Diamond Speed 40
1,180 g

Lightweight 40L alpine pack with removable framesheet.

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Durston Gear Kakwa 55 UltraGrid Pack Small
820 g

Updated ultralight pack size S, 28.9oz, with improved hipbelt and durability

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Black Diamond Speed 40 vs Durston Gear Kakwa 55 UltraGrid Pack Small: which should you buy?

If saving weight is your priority, the Durston Gear Kakwa 55 UltraGrid Pack Small wins — at 820 g it is 360 g (31%) 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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