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RockyMountsTomahawk Fat Bike Ready Upright Mount


Item # RMO000I

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  • Black, One Size ($169.95)
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Item # RMO000I

Tomahawk Fat Bike Ready Upright Mount

When the innovative minds at RockyMounts decided that fat bike racks were too few and far between, they created the Tomahawk Fat Bike Ready Upright Mount. With the overall structure carried over from the venerated BrassKnuckle and its new capability to fit any bike ranging from 20-29 inches with any road, mountain, or fat tires, we think the Tomahawk is a valuable addition to the current crop of roof racks being offered.

RockyMounts set out to make the Tomahawk as adaptable as possible, creating it with an interchangeable arm so that it can be mounted on the driver or passenger side of a vehicle with a swingarm that will hold your precious cargo in place without touching its frame. To accommodate a fat bike, RockyMounts includes two wheel strap extensions that work with tires up to five inches wide, as well as universal hardware that will pair effectively with any style of crossbar on your vehicle.

  • Do-it-all upright mount than can even handle fat bikes
  • Fits any bike ranging from 20-29 inches, and up to 5 inches wide
  • Interchangeable arm can be mounted to either side of car
  • Universal hardware is compatible with most roof crossbars

Tech Specs
Bike Capacity
all bikes 20 - 29 inches, fat bike
Locks Included
Recommended Use
Manufacturer Warranty

View more Roof Rack Bike Mounts

    What do you think about this product?


    >Rating: 5


    Great roof mount for the price!

    >Rating: 5

    Works Great for 27.5" & 29" wheel sizes

    I've used it several times

    I just purchased the RockyMounts Tomahawk upright mounts for a 27.5" & 29" wheel sizes and the mounts worked perfectly. The install instructions on the RockyMounts were a little vague but we figured it out. The overall construction/materials are of high quality. I immediately put them to the test by taking them on a road trip from Colorado to Arizona. Over the course of hundreds of highway miles and driving down bumpy forest service roads we did have to tighten some bolts on the bottom bracket, but with most things with bolts and lots of movement is bound to happen. I went with the RockyMounts based on the reviews and the price difference between the other upright bike mounts. I would recommend them to those who are on a budget or not on a budget! One of the mounts came damaged (just cosmetic) and Backcountry made it right without me having to send them a novel and a 100 customer service I have experienced!

    >Rating: 3

    Not for XL Bikes

    I returned this product before using it

    I've been searching for a roof top bike rack for my Fat Bike that didn't cost an arm and a leg. The Tomahawk appeared to fit the bill. I bought the rack and installed it only to find out my XL Fat Bike was only hanging on by a thread at the end of the rack. I'm not risking my bike on that. I had an issue getting the straps to stay in the track once they were installed. I also did not like how the arm locked on. It was rubbing the frame - but that could be related to the fit. My XL 29er does not fit either. Overall, the rack is a solid build once you get it on the car. Installation is rather tricky as the instructions are not as clear as they could be (I'm an engineer and had to make educated guesses to get it installed correctly). If I had a smaller bike that actually fit - I'd give this rack 4 stars - minus 1 star for the installation.

    >Rating: 5


    I've used it several times

    Feels very overbuilt. Not just for fat bikes, this fits my 2.4" wheels like a champ.

    >Rating: 5

    best fatbike carrier

    I've put it through the wringer

    after installing it on a Yakima crossbar(already had Yakima bike carrier on my car), loaded the fatbike on the carrier and went out for test to see fatbike on the roof will hold or bike fall off. carrier did the job and no problem with carrier. you have to install it correctly(read all the instruction), otherwise carrier will not work


    any chance the lock cores from Yakima will work with the Rockymounts? Converting for the fat bike and have the Yakima cores. Thanks!

    >Rating: 5

    Best Carrier

    I've put it through the wringer

    it is easy to install on round load bar or blade load bar. it really is easy to like it says. it is the best one of the fat bike. you can use it carry any types of bike you have. I have full carbon fat bike and don't like to take front wheel off to load it on the carrier. with this carrier you don't have to take wheel off at all


    Will this work on factory crossbars on a 2012 Subaru Forester?

    >Rating: 5

    Great rack at a competitive price!!

    I've used it several times

    I already had a Rocky Mount BrassKnuckles rack, and liked being able to throw my bike on the roof securely with both wheels attached and no contact from the rack to the bike frame. I liked it so much, I was in the process of buying a second one, along with the FatBike adapter (around another $20) when I saw that RockyMount had released the Tomahawk. They are functionally the same, though the BrassKnuckle seems finished a bit more nicely, and the Tomahawk comes ready to carry large tire fatbikes. So, the same functionality of the rack I really like without the need to buy an additional adapter to carry my Moonlander. RockyMount saved me $70.


    Is there a bike weight limit on these?

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