Osprey Radial Bike Commute Backpack vs Osprey Siskin 8 Hydration Backpack

The main difference between the Osprey Radial Bike Commute Backpack and the Osprey Siskin 8 Hydration Backpack is that the Radial Bike Commute Backpack has Hip Belt / Waist Strap (Webbing hipbelt) while the Siskin 8 Hydration Backpack does not.

Osprey Radial Bike Commute Backpack Front View
Osprey Siskin 8 Hydration Backpack Front View
Specs Brand Osprey Osprey
Name Radial Bike Commute Backpack Siskin 8 Hydration Backpack
Category Commuter Hydration
Sub Category Everyday Outdoor
Capacity (L) 34L 8L
Dimensions (in) 20.49 x 13.79 x 11.82 18.5 x 8.5 x 6.9
Weight (lb) 3.3 1.2
Fabric 210D Nylon Dobby 900x600D Polyester
Color 3 colors and patterns 3 colors and patterns
Warranty Osprey Lifetime Warranty Osprey Lifetime Warranty
Release Date July 31, 2019 December 5, 2018
Rating 4.6 4.8
Price Under $200 Under $100
General Features Shoulder Straps Adjustable shoulder straps Adjustable shoulder straps
Sternum / Chest Straps Adjustable sternum strap with safety whistle Adjustable sternum strap with magnetic valve
Hip Belt / Waist Strap Webbing hipbelt
Main Compartment Access Normal zipped access Full front zipped access
External Pockets Scratch-free zippered pocket and 2 side zipped pockets Top zipped pocket
Internal Compartments Document sleeve and internal organization Internal scratch-free slash pocket
Side Pockets Side pockets can fit water bottle and other accessories
Water Bottle Yes No
Handles Top grab handle Top grab handle
Loops and Attachments LidLock helmet carry, blinker light attachment LidLock helmet attachment, ;oop for blinky light attachment
Business & School Features Laptop Sleeve Padded laptop sleeve fits up to 15"
Organizer Pocket Front organization pocket
Travel Features Compression Straps External compression straps
Hiking / Backpacking Features Back Panel Airspeed back panel Mesh-covered extra deep ridged foam with center air channel
Rain Cover Built-in raincover
Ventilated Back Mesh-covered die-cut foam for ventilation
Reflective Safety Strips Reflective prints and zipper pulls Reflective accent
Gym / Sports Features Laundry Pocket Separate compartment for dirty clothes or shoes
Hydration Features Bladder Size Includes Osprey Hydraulics LT 2.5L reservoir by Hydrapak
Hydration Compatible Yes

You're currently comparing the Radial Bike Commute Backpack by Osprey against the Siskin 8 Hydration Backpack by Osprey .


Osprey 's Radial Bike Commute Backpack is a Commuter backpack with Everyday features while Osprey 's Siskin 8 Hydration Backpack is a Hydration backpack with Outdoor features.

The Osprey Radial Bike Commute Backpack has a capacity of 34L (liters), weighs 3.3 pounds and it's dimensions in inches are 20.49 x 13.79 x 11.82. It's made of 210D Nylon Dobby and is available in 3 colors and patterns in comparison the Osprey Siskin 8 Hydration Backpack's capacity is 8L with a size of 18.5 x 8.5 x 6.9 inches. Constructed from 900x600D Polyester it weighs 1.2 pounds and is available in 3 colors and patterns.