THE SELL: A lightweight behemoth for big trips. THE TEST: A large drop-door design gives you full access to all 110 liters of cargo space, while two exterior compression straps cinch sloppy loads into a compact bundle. And thanks to extra-large polyurethane wheels, it's impressively nimble for such a big guy. Smart: a hideaway loop lets you piggyback just about any carry-on bag, while D-rings are designed specifically to mate with Osprey's Daylite pack (sold separately; $49), a sweet little bag in its own right. All this, plus it's reinforced in the right places and still weighs under nine pounds—one of the lightest big rollers we tested. THE VERDICT: Start planning your dream multisport vacation.