RMU Enduro Fanny 5L Review


Review by Alex Sardella

Rocky Mountain Underground holds its roots in the ski industry, a company born in the front range of the Colorado Rockies. However, as most mountain stories go, winters turn to summers and a love for the high alpine becomes a year-round obsession. Backing their mountain culture origins, RMU is slowly developing a mountain bike specific line to help round out a range of goods for all 4 seasons. We recently got our hips wrapped by their Enduro Fanny 5L pack, a nice addition to your riding kit and carrying more gear out on the trial.

RMU Enduro Fanny 5L Contents CloseupTHE LAB
At first glance, the Enduro Fanny 5L is noticeably purpose built, no extra straps, loose ends, or awkwardly sized-storage pockets that you are not sure what goes in it. The sleek, all-black outershell is made of a 420D Nylon, carbonite, and PU coating, which means its weatherproof, and anything that goes inside will stay dry. A priceless feature if you live in a rainy environment. The pack features two main storage bodies; one that is fleece lined, and one that will carry your standard trail tools, snacks, etc. The compartment that is fleece lined features a small key clip which is a safe way to keep your keys secure while out on the trail or shuttling. I’ve been opting to keep a spare pair of gloves in there too. The main storage body features three smaller elastic compartments, one larger elastic compartment, an upper holster for a small pump, and a zippered small storage pocket. There is also a detachable cargo sleeve that comes out from the bottom of the pack, and attaches to the upper portion of the pack which is designed to hold a extra layer or helmet.

The adjustable waist belt is designed to fit waist sizes 28” to 42”. There is a gold aluminum buckle which is fairly easy to use and is a more robust option than the traditional plastic snap-buckle. On the waist band, the Enduro Fanny has a small sleeve and rubber band holster to carry a water bottle on the outside, and has room for a water bladder on the inside. The reservoir can be routed to go out either the right or left side and has a strap on both sides to help hold the hose and mouthpiece in place.

The pack contours nicely around my lower back and is cozy both climbing and descending. The external back pad features a 7mm EVA foam which contours nicely on your lower back and breathes fairly well. The RMU Enduro Fanny 5L weighs 1.5 pounds empty and has a fair price point of $79.99. Lastly, the pack boasts a lifetime warranty from all manufacturer defects.

RMU Enduro Fanny 5L Review

Going into Fall I start to carry a few extra items on me. An extra layer, a set of lights, maybe some spare gloves in case of rain, so having storage options on the hip and off your back is pretty clutch. The RMU Enduro Fanny features plenty of room to carry riding essentials with organized compartments for any tool, snack, light, beer, you decide to bring on your ride. All of those compartments are just the right size and everything has a place inside the main storage body. Another key feature is the deployable mesh cargo area that can hold a jacket or helmet. I’m a ‘always wear a helmet guy’, but definitely know people that would use this to store their helmet for those long, grunty, fire road climbs. Having the pack waterproof is a nice touch as well, keeping items dry is important especially as weather is getting colder and wetter in most climates this time of year.

At first glance I did think the water bottle sleeve would be a bit too loose, it does flop around a bit, especially when the water is full, but other than that it doesn’t move around too much with the aid of the small rubber elastic. I did notice that the pack tends to sag a bit with the full weight of a full water bottle, so you really have to cinch down the belt across your waist. The waist sizing does suggest the pack can fit a 28” waist, but my 32” waist had the tightening belt pretty maxed out. You can definitely go tighter; you will just have extra ‘slack’ on the belt and it would look messy as there is no way to tuck in the unwanted slack.

The Wolf’s Last Word

RMU is slowly working its way into the scene with a few niche products for mountain biker enthusiasts.  Overall, the Enduro Fanny 5L is sleek, well designed, and the price point comes right in line with most packs around the same size of storage. The added waterproof coating is a worthy addition that sets this pack apart from the rest.  With temps dropping and unpredictable weather approaching, the RMU pack is a solid addition to your Fall rides with ample storage for anything you might encounter while out on the trails.

Price: $79.99
Website: RMUoutdoors.com

We Dig

Thoughtful Design
Robust, Aluminum Buckle

We Don’t

One size won’t fit all


Want to win some free schwag? Leave a comment and vote up the most thoughtful comments and each month we’ll pick a winner. The person with the smartest and most helpful replies will earn some sweet new gear. Join the Pack and get the latest news and read the latest reviews on the top mountain and electric mountain bikes.