← All gear comparisons

Black Diamond Speed 40 vs Osprey Sirrus 36

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

No winner on weight yet. The recorded weights have not both been verified on the same basis. Size, included parts and single-item versus pair weights can differ. Check the linked sources before choosing a replacement.

Swipe to see all details.

Spec Black Diamond Speed 40 Osprey Sirrus 36
Weight 1,077 g · 1.077 kg · 2.37 lb
size S/M (M/L is 1115 g)
 1,220 g · 1.220 kg · 2.69 lb
Brand Black Diamond Osprey
Category Backpack Backpack
Black Diamond Speed 40
1,077 g

Lightweight 40L alpine pack with removable framesheet.

See it in your base weight → Full details →
Osprey Sirrus 36
1,220 g

Women's ventilated 36L pack with AirSpeed back panel.

See it in your base weight → Full details →

Building a pack? Add either one to your HikeLoad list, or drop its weight into the base weight calculator, and see what it does to your total weight.

HikeLoad is reader-supported. As an Amazon Associate we earn from qualifying purchases, at no extra cost to you. Learn more.

Black Diamond Speed 40 vs Osprey Sirrus 36: which should you buy?

The listed weights alone are not enough to choose between these products. Confirm the size, included parts and weight basis against each source; choose equipment for the function and fit you need.

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

More backpack comparisons

Black Diamond Speed 40 vs Black Diamond Beta Light 45L Black Diamond Speed 40 vs AONIJIE FH2542 42L Hiking Backpack Black Diamond Speed 40 vs Osprey Talon 44 Black Diamond Speed 40 vs REI Co-op Flash 45 Black Diamond Speed 40 vs Fjallraven Kajka X-Lätt 45