Best Small MTB Backpacks: 4 Hydration Packs Compared

Robert Wilson · 2026-06-15

You know that feeling. You're about to head out for an after-work ride, and you just want to grab your bike and go. But you can't. You need water, a pump, a multitool, and maybe a snack. That's where a good small mountain biking backpack comes in. We've been testing four of the most popular compact models to find out which one actually works best on the trail. And trust me, they're not all created equal. ### What We Looked For We took these packs on dozens of rides, from quick lunch loops to longer afternoon adventures. The goal was simple: find the pack that carries the essentials without getting in the way. We paid close attention to comfort, how easy it is to access your stuff, and how well the hydration system works when you're bouncing down a rocky descent. Here's a quick look at the four contenders we tested: - **CAMELBAK Chase Race 4:** A 3-liter vest-style pack with a 1.5-liter bladder included. Priced at $129. - **Deuter Rogla 5:** A 5-liter classic backpack with a 2-liter bladder (sold separately). Priced at $109. - **EVOC HYDRO PRO 3:** A 3-liter vest-style pack with a 1.5-liter bladder included. Priced at $147. - **Rhythmus RP 9L:** A 9-liter classic backpack with a 2-liter bladder (sold separately). Priced at $160. ### Vest vs. Classic: Which Design Wins? This is the big question. Vest-style packs, like the CAMELBAK and EVOC, wrap around your torso and distribute the weight across your chest. They feel incredibly stable, especially when you're leaning forward on a steep climb or hitting a rough section of trail. Classic backpacks, like the Deuter and Rhythmus, sit more traditionally against your back. They usually offer more structure and storage, but they can bounce around if they're not adjusted perfectly. For short, fast rides, the vest-style is hard to beat. For longer days where you need to carry a jacket, extra tools, and more food, a classic backpack might be the better choice. ### The CAMELBAK Chase Race 4: The Minimalist's Dream If you want to carry the absolute minimum and feel like you're wearing nothing at all, this is your pack. The Chase Race 4 is incredibly lightweight and fits like a second skin. The material feels premium, and it doesn't soak up water when you're caught in a surprise rain shower. The chest pockets are a game-changer for quick access to your phone or a snack bar without stopping. The internal organization is surprisingly good for such a small pack, with dedicated slots for a multitool and a pump. **The downside?** You really can't carry much more than the basics. Forget about stuffing a jacket in here unless it's a super thin windbreaker. Longer pumps can also be a tight fit, bumping into the top of the main compartment. The adjustment straps under the arms are functional but can feel a bit long and flappy if you're on the smaller side. ### The EVOC HYDRO PRO 3: Premium Feel, Premium Price The EVOC HYDRO PRO 3 is the most expensive pack in this test, and it feels like it. The build quality is outstanding, with robust zippers and a very comfortable, breathable back panel. Like the CAMELBAK, it's a vest-style pack that stays put on rough terrain. The hydration system is excellent, with a high-flow bite valve that's easy to use even with gloves on. **The catch?** It's even more minimalist than the CAMELBAK. Storage space is incredibly tight. You can fit a multitool, a spare tube, and a pump, but that's about it. If you need to bring a jacket, you'll have to strap it to the outside. For the price, some riders might expect a bit more versatility. ### The Deuter Rogla 5: The Balanced All-Rounder This is the pack that surprised us the most. The Deuter Rogla 5 is a classic backpack design, but it's been refined for mountain biking. It sits close to your back and doesn't bounce around like you'd expect from a traditional pack. The 5-liter capacity is the sweet spot for most riders. You have enough room for a 2-liter bladder, a jacket, tools, snacks, and even a small first-aid kit. The organization is smart, with a separate tool compartment and a key clip. **The main drawback?** It doesn't come with a hydration bladder. You'll need to buy one separately, which adds to the cost. The fit is also less snug than the vest-style packs, so you might notice it more on very aggressive descents. ### The Rhythmus RP 9L: For the Day-Tripper If you're planning on being out on the trail for more than a couple of hours, the Rhythmus RP 9L is the pack you want. It's a full-featured backpack with plenty of space for a 2-liter bladder, a full change of clothes, a repair kit, and enough food for a day-long adventure. The shoulder straps are well-padded and adjustable, and the back panel offers good ventilation. **The trade-off?** It's the heaviest and bulkiest pack in the test. For a quick after-work ride, it feels like overkill. The extra space also means you're tempted to carry more than you need, which can lead to back pain on longer climbs. It's a great pack, but only if you actually need that much capacity. ### Which One Should You Buy? Here's the bottom line: - **For the minimalist who only wants water and a few tools:** Get the **CAMELBAK Chase Race 4**. It's lightweight, comfortable, and well-organized. - **For the rider who wants premium feel and doesn't mind the price:** The **EVOC HYDRO PRO 3** is beautifully made, but be prepared for very limited storage. - **For the all-rounder who wants a pack that does everything well:** The **Deuter Rogla 5** is our top pick. Just budget for a bladder. - **For the day-tripper who needs to carry a lot of gear:** The **Rhythmus RP 9L** has the space you need, but it's not for short rides. No matter which pack you choose, the most important thing is that it fits you well and carries what you need without weighing you down. Happy trails!