First Look: Rocky Mounts BrassKnuckles upright roof rack

New rack promises ease of use with a quieter, more aero profile

Gear Racks

Rocky Mounts Trek On

The new Rocky Mounts BrassKnuckles make it easy to carry any bike without removing the front wheel, which is becoming more and more of an issue with the increasing prevalence of thru-axles on mountain, cyclocross and road bikes.

Update (Sept. 22):
We met briefly with Rocky Mounts during the Interbike Trade Show in Las Vegas in mid-September. They let us know that BrassKnuckles have officially started shipping — and that they would have a fatbike adapter (pictured below) available for the system sometime in mid-October. The Fattie adapter ($20) will consist of an XL sized wheel chock that replaces the standard chock, plus a pair of wheel strap extenders. The Rocky Mounts crew says they’ve tested the new system with a bike spec’d with 4.8” tires and there was still a little room to spare. The switch itself requires no tools and can be done in about two minutes. And if you don’t feel like switching back and forth, the large size chock is fine for use with regular size MTB or road tires.

The Fattie

First Look: Rocky Mounts BrassKnuckles

After a handful of manufacturing delays, Rocky Mounts has started shipping its new $200 BrassKnuckles upright roof rack. We first spotted the new rack at its official unveiling at company HQ in Boulder, Colorado, last January. More recently, we had a test model installed on our car. So far, so good. Aside from some occasional handle stickiness that’s easily remedied with a little jiggling, the new rack has delivered as advertised, providing an easy-to-operate solution for bikes with thru-axles — or really any bike. Once you get used to not taking off your front wheel, you wont want to go back.

Wind noise is also greatly reduced when compared to our old set-up, and frankly we love the look of the BrassKnuckles stealthy aero profile. Our test set-up has a white aluminum casting tray. Rocky Mounts will also offer black and red models.

“Dealing with thru-axles was obviously the No. 1 reason,” explained company founder Bobby Noyes when asked why bring the new rack to market. “But I also just really didn’t like how the other roof-top options out there looked. They’re loud and just unappealing. We wanted to make something that paired well with the clean lines of modern cars. Bike racks are typically not in use more than they are in use, so how it performs in the stowed position was really important to us.”

Rocky Mounts Side View Rocky Mounts Aero Profile

The stealthy rack measures just 2 inches tall when not in use, which is about half that of the competition.

Noyes and his design team feel they achieved this by integrating the arm assembly into the tray, which creates a lower profile. When not in use the BrassKnuckles rack measures about 2 inches tall, roughly half that of the competition. As for the knuckle-shaped handle, the name is a tongue-in-cheek homage to the company founder’s New Jersey roots, where (wink, wink) brass knuckles are as common as bad hair and fake tans. But Noyes says the unique design actually was born from an effort to address ergonomics issues.

“Some of the other similar racks have a clunky plastic clamshell assembly,” he explained. “We opted for the aluminum collar and made it slender like a rifle grip. Then we started thinking about the collar and its shape. It all just evolved from there. We really spent a lot of time thinking about the ergonomics.”

And in case you’re wondering, the knuckles are not removable. “Real brass knuckles are actually illegal in five states, including California,” added Noyes. Good to know.

Rocky Mounts Top View Rocky Mounts Bar Up

A front strap and wheel chock provide extra assurance that your bike is safe and secure.

While you cant use the knuckled handle as a crude gangland weapon, it does make the arm-and-wheel hook easy to pull down and secure when loading your bike. The whole process is fairly straightforward: extend the arm, raise the wheel chock, undo the front- and rear-wheel straps, then lift your bike into place on the wheel tray. Next rotate the swing arm over your front wheel and pull down to secure. Then crank down the straps over your rims, give one more tug on the arm handle (which clicks to assure engagement) and off you go.

Aside for the handle occasionally sticking, the only hitch we’ve encountered is that of height, as in how tall the user is. I’m a shade under 6-foot-4, so it’s not an issue to lift a 28-pound mountain bike onto the roof. But my 5-foot-5 wife really has to muscle it up, and would probably be best served by a step stool as aid. Of course this issue applies to any upright roof rack no matter the make or model.

As for compatibility, BrassKnuckles fit 20” to 29” wheels, including all manner of road bikes and all three mountain bike wheel sizes with tires widths up to 2.7”. Rocky Mounts will also soon be offering a $20 fatbike kit to accommodate even wider tires. It’s also worth noting that Lefty one-sided mountain bike forks are no problem. “That’s one of the main reasons we include the front wheel strap, which Thule doesn’t have,” said Noyes. “It’s one extra step, but one lost bike is not worth it.”

Form-fitting mounting hardware fits all crossbars, including Rocky Mounts Ouray, Thule, Yakima, Aeroblade, Whispbar, Rhino Rack, and most factory models.

Rocky Mounts MTB On Rocky Mounts Trek OnThe rack works with all manner of bikes from 20-29 inches, road, mountain or cyclocross, tires up to 2.7″. You’ll also soon be able to purchase a fatbike adapter for wider tires.

The pivoting arm has also been engineered to allow for driver-side or passenger-side installation. If you come by the HQ store in Boulder, Rocky Mounts will do the install for free.

Our test model included installation of the just released Flagstaff towers and Ouray crossbars, which enhanced the clean look and symmetry of the whole system. Noyes says the crossbars have a 3-to-1 profile ratio front to back, which makes them more aero and quieter. We haven’t done a gas mileage check yet, but the noise level compared to our old Thule cross-bar set-up is night and day. Much, much quieter.

The BrassKnuckles come stock set-up for driver’s side installation. If you opt to place on the passenger side — or buy two racks — it takes a few minutes to switch it over. Other features include stackable contact pads that enable you to level your bike even on crowned crossbars, and a secure locking system that locks the rack to your car and bike to the rack with Rocky Mounts lock cores. Two are required and they are sold separately.

Finally, there is the question of security. Without a mechanism that locks directly to the frame, it is conceivable that a thief could undo the bike’s front quick release or thru-axle, and then wiggle the bike off the rack. We haven’t actually tried this ourselves yet, but it’s clearly possible given the rack’s set-up.

“We are aware of the challenge with locking a bike with an upright mount,” admitted Rocky Mounts president Bruno Maier. “We design our racks for convenient and safe transport. We include a lock in the handle as a theft deterrent. The product is designed to slow down bike thieves and make the theft more difficult. Frankly, there isn’t a full proof solution for locking bikes to any vehicle racks.”

Continue to Page 2 to learn more about Rocky Mounts and to see an extended photo gallery »
About the author: Jason Sumner

An avid cyclist, Jason Sumner has been writing about two-wheeled pursuits of all kinds since 1999. He’s covered the Tour de France, the Olympic Games, and dozens of other international cycling events. He also likes to throw himself into the fray, penning first-person accounts of cycling adventures all over the globe. Sumner, who joined the / staff in 2013, has also done extensive gear testing and is the author of the cycling guide book "75 Classic Rides: Colorado." When not writing or riding, the native Coloradoan can be found enjoying time with his wife Lisa and daughter Cora.


  • tom says:

    new product blah blah blah … it looks cool … blah blah … you need it … blah blah … you can make a thru axel lock stand for your roof-rack for under a tenner that looks boss, is uber engineered and is thus as strong as a whole box of oxen … this is pointless like most of these gizmos … get yer tools out, get yer hands dirty … make stuff 🙂

  • gman says:

    lol. tom nailed it with his assessment of this overpriced unit.

  • Me.... says:

    Well I think it is a great idea. You guys keep up the overpriced stuff……until the day you either drive over you tire or loss your front axle….$70-$400 later and you will kick yourself for not buying it.

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