Detail Images

  • Mountainsmith - Packed
  • Mountainsmith - Bike Cube - 3417cu in - Cobalt
  • Mountainsmith - Packed -

Current Color

  • Mountainsmith - Bike Cube - 3417cu in - Cobalt

Mountainsmith Bike Cube - 3417cu in


Free 2-Day shipping on orders over $50*

Select your style & size:

Select options
  • Select options
    • Cobalt, One Size

    3 Reviews


    Bike tires aren't cubed, but sweet gear bags are.

    If you are always asking your buddies to borrow their bike tool or you can't find your helmet, shoes, or extra tube, then you'll love the Mountainsmith Bike Cube. It helps you spend less time scratching your head and doing a gear dump and more time hitting your route or drinking a beer after. Your shoes and helmet fit securely in mesh sleeves on one side of the bag and all your tools and supplies slip into multiple pockets on the other. Stash your dirty clothes in the main storage compartment and don't worry if you forget about them―the coated mesh inside helps them ventilate.

    • 150D and 210 D ripstop fabric
    • Tri-panel load access
    • Tote style haul handle
    • Attachment points for Haulin' Padded Shoulder Strap (sold separately)
    • Fits into all Modular Hauler Systems
    • Item #MOU000E

    Tech Specs

    150D ripstop, 210D ripstop
    15 x 15 x 15 in
    3417 cu in
    tri-panel zip
    Claimed Weight
    1 lb 15 oz
    Recommended Use
    hauling gear, bike organization
    Manufacturer Warranty

    Tech Specs

    • Reviews
    • Q & A

    What do you think about this product?

    Have questions about this product?

    Good in theory; not in practice.

    • Familiarity: I've used it once or twice and have initial impressions

    This bag conforms to the Mountainsmith cube system, which can be a efficient way to transport/organize stuff. The cubes pack a lot of cargo in relatively small footprint. But for my cycling gear - for which this bag was intended - it wasn't very practical.

    In the first side compartment, the helmet and shoe mesh pockets did not fit my size medium Giro Atmos or size 42 Shimano road shoes. I suppose if I really tried, I could squeeze them in, but that would get old by exactly the second time I had to do it.

    The compartment on the opposite side has smaller mesh pouches, good for nutrition, tubes, tools and other small items. But I'd prefer some larger water-bottle-sized pockets as well. There's certainly room for it.

    The three compartments are each about 1/3 of the bag, so the center compartment is relatively narrow compared to a typical duffel bag. Like the side compartments, the center has a single zipper; but unlike the others, the zipper doesn't continue down the sides (for obvious reasons). So what you are left with is a somewhat narrow opening to a relatively deep compartment. It's not a very practical way to organize stuff. You end up digging around to get to stuff. There are larger mesh pockets here that hold water bottles nicely - but, assuming this compartment is where the clothes are going, I'd rather have the possibly wet bottles in one of the side compartments.

    Lastly, I drive a Mini, and this bag is too wide to fit in the trunk. Yeah, ok, it's a Mini.

    On the flip side, the bag appears well made. The capacity is fairly good. The colored interior (vs black) makes seeing typical black cycling gear (socks, gloves, warmers) much easier - a small, but valuable detail. The price is quite a bit cheaper than some other purpose-built bags. If you don't have a lot of floor space or already use the Mountainsmith packs, this could be a good solution to pack a lot of gear in a small space. But if that's not a concern, I think there are some better offerings available.

    I love this bag!

    • Familiarity: I've put it through the wringer

    First off, I'm super stoked that and Mountainsmith gave me the chance to do a review of this gear bag for the Backcountry community!

    Now let me be honest, when it comes to gear storage, my garage is full of shelves covered with rubbermaid storage bins. Each one is labeled in Sharpie with what hobby the contents belong. And inside those bins, everything is just thrown in and mixed together. If I am looking for something small, it may take a while to find. So when I received the Bike Cube, I saw a light at the end of the rubbermaid tunnel.


    This bag is labeled as a bike bag, which it definitely succeeds, but really you can used it to store just about any type of gear. I have all my bike gear in it currently, but did use it as a travel pack for a recent road trip. I stored my bike gear, camping gear, some food, and dirty clothes. It's very multi-functional.

    Performance and Fit:

    I love the layout of this bag! It has 3 individual compartments that open fully across the top and wrap all the way down each side so you can really open them up and see whats inside. There is plenty of room inside each of them for shoes, helmets, hydration packs, jerseys, shorts, etc. Inside each of the 2 outer compartments there are smaller pockets on the inner side, that work great for stuffing smaller items like glasses, multiple pairs of gloves, cycling computers, etc. Inside the center compartment there are a couple other pockets that are larger than the small ones I just mentioned. These work well for those items that are just a tab bigger.

    The bag is big enough that I have completely replaced my "cycling" rubbermaid and use the Bike Cube for both my road and mtn bike gear. I keep shoes and gloves for the road on one side and the same for mtn on the other and then in the middle I have both helmets and I also throw in my jersey and shorts for the after work rides. And with all that, the bag still has more room for more gear if I need to throw in a couple extra things for a long weekend of fun.

    Build and Quality:

    It is made of a very durable ripstop fabric which feels like it would be pretty tough to tear. The zippers are of good quality and have shown no signs of binding and getting stuck like a lot of bags do. It has two strong straps that velcro together with a padded handle for carrying. It also has a longer strap with padded sleeve for clipping on the sides and throwing it over your shoulder. One of my favorite features is the mesh vents in the top of each compartment. These are very nice when you open up the bag after stuffing all you sweaty gear into it 3 days early. They definitely help let the funk escape. Also the inner parts are mesh, so even those small items can get some air movement.


    The Bike Cube is unique compared to other bags because it is a cube! When piling a week worth of gear for 3 guys into the back of a Subaru, you are reminded of the game of Tetris. Luckily the cube made at least one move easy and would always fit very nicely compared to the long round bags.

    Also after seeing pictures and video of the Cubes online, I can definitely see how having multiple gear cubes could make packing a whole lot easier when everything fits together. Very neat and well developed concept by Mountainsmith.

    Final Thoughts:

    Well after years of using rubbermaids and spending way to much time searching for gear, I believe Mountainsmith has changed my ways. I love how I can go straight to the compartment, slide my hand into the pocket, and pull out exactly what I was looking for. I love how I can just throw the strap over my shoulder or grab the handle and head out the door. I love how it still fits on a shelf and does not look like it will fall off like overstuffed duffle bags. I love how my gear can still breath once packed away. I guess I just love this bag! And I will be definitely looking into upgrading some of the other rubber bins to Mountainsmith Cubes!

    I love this bag!