Best Small MTB Backpacks: 4 Hydration Packs Tested

James Moore · 2026-06-15

As little as possible, as much as necessary: small MTB backpacks carry exactly what a trail ride demands, from a hydration bladder to a repair kit. We tested four compact models to find out which one suits your riding style best. Shut your laptop, put on your helmet, and head straight from the office to the trail. That's what after-work rides look like for many of us. You don't need much gear, but water, a pump, a multitool, and a snack are non-negotiable. Small MTB backpacks and hydration packs promise to strike that perfect balance between compact size and enough storage for the essentials. But which model is best organized? Which one includes a hydration bladder? And are 3 liters enough for a quick ride, or do you need closer to 9? We compared four backpacks we regularly use for our work outings to find out. ### Which MTB Backpack Is Right for You? For this comparison, we chose four small MTB backpacks that we use regularly. The models differ significantly, ranging from minimalist 3-liter packs with hydration bladders to a 9-liter model with more storage for longer day trips. The key factors we focused on were comfort, compartment layout, storage space, hydration system, and real-world trail performance. | Brand | Model | Weight (without bladder) | Price (USD) | Pack Volume (liters) | Hydration Bladder (liters) | |-------|-------|--------------------------|-------------|---------------------|---------------------------| | CAMELBAK | Chase Race 4 | 8.7 oz (248 g) | $129 | 3 | Included: 1.5 L | | Deuter | Rogla 5 | 12.7 oz (361 g) | $109 | 5 | Up to 2.0 L (not included) | | EVOC | HYDRO PRO 3 | 9.1 oz (258 g) | $147 | 3 | Included: 1.5 L | | Rhythmus | RP 9L | 21.5 oz (609 g) | $160 | 9 | Up to 2.0 L (not included) | ### What's the Difference Between a Vest System and a Classic Backpack? Vest systems fit snugly around your upper body like a vest and distribute weight more across your chest. This gives you a super stable fit, especially on rough trails. Classic backpacks sit more against your back and often offer more storage and structure, though not all of them stay as close as you'd hope. It's no surprise that most models in this test use vest systems. For small, performance-focused MTB backpacks, this concept makes more sense. Only the bigger Rhythmus backpack offers extra adjustability through shoulder straps, like a traditional backpack. But which concept works best on the trail, and which one delivers the most convincing overall package? ### The CAMELBAK Chase Race 4 Review – The Minimalist The CAMELBAK Chase Race 4 is a trail backpack focused on the essentials. With its compact cut, 3-liter capacity, and a 1.5-liter hydration bladder included, it's aimed at riders who only want to carry water, tools, snacks, and a few small items on short rides. It's not designed for bigger loads, especially when the bladder is full. Straight out of the box, the backpack feels high-quality. The material is robust and doesn't soak up water in wet conditions. On your back, the Chase Race 4 feels airy and soft—more like a snug vest than a classic backpack. This delivers excellent comfort, especially if you want to feel as little weight as possible on the trail. Its relatively low weight (8.7 ounces) underlines its minimalist character. The small CAMELBAK is well organized inside. A multitool, valve, or snack bar sits neatly in place without turning into trail-pack chaos. The chest pockets offer quick access to your phone without breaking your stride. The chest straps are broad, easy to clip, and adjustable enough to dial in a secure fit. **The downside?** The minimalist concept means very limited storage space. As soon as you want to carry a jacket or extra gear, things get tight. Longer pumps can bump into the top of the compartment. There are also long adjustment straps under the arms. While they let the pack fit a wide range of body types, they can flap around if not cinched down. ### The Deuter Rogla 5 Review – The Versatile Mid-Size The Deuter Rogla 5 offers 5 liters of storage, making it a step up from the minimalist packs. It's a classic backpack design, so it sits against your back rather than wrapping around your chest. The weight is 12.7 ounces, which is a bit heavier but still manageable for day rides. This pack doesn't come with a hydration bladder, but it can hold one up to 2 liters. We liked the separate tool compartment and the soft, padded back panel. It's comfortable for longer rides, though it doesn't feel as locked in on rough descents as the vest-style options. The price is $109, making it a solid mid-range choice. ### The EVOC HYDRO PRO 3 Review – The Vest-Style Performer The EVOC HYDRO PRO 3 is a 3-liter vest-style pack that's all about stability. It includes a 1.5-liter hydration bladder and weighs just 9.1 ounces. The fit is incredibly snug, with stretchy chest straps and a low-profile design that keeps everything close to your body. On the trail, this pack disappears. You barely notice it's there, even when you're bouncing over rocks and roots. The front pockets are perfect for quick access to snacks or your phone. The downside is the limited space—like the CAMELBAK, you can't carry much more than the basics. At $147, it's the priciest of the small packs, but the performance is top-notch. ### The Rhythmus RP 9L Review – The Bigger Option The Rhythmus RP 9L is the largest pack in our test, offering 9 liters of storage. It weighs 21.5 ounces and costs $160. It's a classic backpack design with adjustable shoulder straps, so it can carry heavier loads more comfortably. It doesn't include a hydration bladder, but it can hold one up to 2 liters. This pack is ideal for longer day trips where you need a jacket, extra tools, or a full lunch. The main compartment is spacious, and there's a separate pocket for tools. On the trail, it feels more like a traditional backpack—stable enough but not as locked in as the vest-style options. It's a great choice if you want more storage without going to a full-size pack. ### Which One Should You Choose? - **For short, fast rides:** Go with the CAMELBAK Chase Race 4 or EVOC HYDRO PRO 3. Both are lightweight, stable, and include hydration bladders. - **For mid-length rides:** The Deuter Rogla 5 offers more space without being bulky. Just buy a separate bladder. - **For longer day trips:** The Rhythmus RP 9L gives you the room you need for extra gear. At the end of the day, the best pack is the one that fits your riding style. Whether you're a minimalist or a pack-rat, there's a small MTB backpack here for you.