Thu. May 23rd, 2019

Suction Cup Bike Rack: Testing the Security of Kupper Automobile Mounts

Will large suction cups securely transport your bicycle?

Typical rooftop and hitch-mounted bicycle carriers are a big funding. Drivers often go away them in place, which impacts mileage, creates noise at freeway speeds, and customarily detracts from the aesthetics of the automotive.

Kupper Mounts Bike Carrier suction cup

Enter the Kupper Mounts Bike Provider. This “rack” attaches to automobiles by way of suction cups, making it fast to mount, take away, and swap between automobiles. Kupper mounts use a 9-inch suction cup for the fork mount and a 6-inch cup for the rear wheel. We’ve been testing a preproduction pattern for every week for this primary look.

It’s value noting that vacuum-based methods aren’t completely new; SeaSucker has been making bike mounts since 2009. However the Kupper is new to the market, launching immediately.

Briefly: The Kupper Mounts Bike Provider addresses issues about vacuum-based methods with sheer measurement. The 10-inch mounted footprint of the fork mount and the 7-inch footprint of the rear mount creates a system rated to 45 kilos that simply suits right into a daypack with a claimed weight of four kilos (for entrance and rear mounts).

The service and bicycle will be mounted in as little as 2 minutes and eliminated in seconds to retain the fuel mileage and appears of the automotive whereas additionally permitting use on a number of automobiles. The Kupper Mounts Bike Provider proved safe with a light-weight street bike even on tough filth roads.

Kupper Bike Mounts: Large Suction Cups

At an unmounted 9-inch diameter for the entrance suction cup and 6-inch diameter for the rear, Kupper Mounts makes use of “larger is best” logic to create sufficient vacuum and floor space on the automobile to quell issues.

Kupper Mounts Bike Carrier suction cups

For many of my grownup life, my bicycles far out-valued my automotive, so I used to be mentally unwilling to leap from hard-mounted racks. However Kupper’s large cups instilled sufficient confidence to offer it a attempt.

Every suction cup makes use of a thumb-driven pump to evacuate air, and there are simply seen indicators to indicate a secure degree of vacuum damaging stress.

Kupper Mounts Bike Provider: First Impressions

Mounting the Kupper Mounts Bike Provider was easy. Clear the attachment factors on the automobile with a moist, soapy rag, and do the identical for the cups if required. Moisten the cups and pump till the suction indicator not exhibits. First-time use requires measuring the spacing between the entrance fork and rear wheel after which repeating the pumping course of for the smaller rear-wheel holder.

Kupper Mounts Bike Carrier on SUV, dirt road

The bicycle mounts equally to conventional racks: a lever-actuated skewer for the fork and a ratcheting strap for the rear wheel. I needed to make use of a Küat strap extender on my 50-plus-mm rear rim.

Professional ideas: Use tape to mark the space between the fork and rear wheel for repeated use on the identical automobile. Additionally, use the included crank strap to maintain the cranks aligned with the chainstay earlier than mounting onto the automobile to stop the crank from damaging the roof of the automotive. The Kupper system holds the bike a lot nearer to the roof in comparison with conventional roof racks.

Whereas stationary, I pushed and pulled on the bicycle to make sure a safe maintain. The lateral motion was noticeable, and within the case of my spouse’s SUV, the motion was principally from the roof quickly deforming underneath the massive entrance suction cup. It wasn’t an alarming quantity and was within the vary of what I expertise with my truck’s roof rack. This additionally held true whereas driving, each on my filth street and down the freeway.

Driving With the Kupper Mounts Bike Provider

Kupper Mounts Bike Carrier on SUV, dirt road

I reside greater than 2 miles down a dust street, and my “driveway” is a climb up a rock-laden hill. Supply vehicles have refused to return down this hill, and during times of heavy rain, lesser automobiles can turn into caught. So I used to be nervous throughout my preliminary run up the hill, as the price of the wheelset alone on my street bike might make a number of mortgage funds. That, and I might hate to break my spouse’s automotive.

In complete, I estimate this bike’s value at $11,000 (I’m fortunate AF, as my career affords me some critical advantages). For reference, it’s a Trek Madone that weighs about 15 kilos.

I obtained out on the high of the hill and checked the stress indicators on the pumps; neither of them had budged. I continued down the filth street and, after crossing something further tough, obtained out and checked once more. The system by no means misplaced stress.

On the finish of the filth street, my confidence within the Kupper system solidified, and a visit down the freeway triggered no issues. I additionally mounted the Kupper Mounts Bike Provider on the rear door of my van, and the expertise was an identical.

Kupper Mounts Bike Carrier on Sprinter van rear door

Tough sections of the filth street precipitated no lack of suction. Plus, this second spherical of mounting the service and attaching the bicycle took 2 minutes — and I wasn’t in any respect speeding.

A pressure-release lever frees the entrance Kupper mount whereas the rear requires lifting an fringe of the suction cup. Neither cup left marks on the automobiles apart from clear spots from mud not with the ability to settle.

The Kupper Mounts Bike Provider comes with a plastic carrying case, a crank positioning strap, a safety strap to run via the automotive door to lock the bicycle, and a cam buckle strap to safe the bicycle wheel when not utilizing the rear mount.

Though it’s straightforward to lock the bicycle to the automotive, locking the service isn’t potential. However for that, removing is a 10-second affair.


The Kupper Mounts Bike Provider proved dependable to move considered one of my most beneficial possessions, even on the tough filth roads. Nevertheless it does require a leap of religion, particularly for these with a historical past of utilizing hard-mounted racks. It’s straightforward to think about a lack of suction, leading to harm to bike, automobile, and doubtlessly others on the street. However testing worn out these anxieties.

I’ll in all probability proceed to test the vacuum indicators any time I pull over throughout a visit, and I’ll solely mount this on undamaged and clear surfaces. However my experiences made me a believer, and I anticipate continued use will solely solidify that belief.

The Kupper Mounts Bike Provider gives an important resolution for rental vehicles and utilization between a number of automobiles. Plus, at $199, it’s inexpensive for the class — and Kickstarter pledges begin at $89! This makes it a discount in comparison with typical roof racks, hitch-mounted racks, and different vacuum-based methods.

The Kupper Mounts Bike Provider is reside on Kickstarter starting immediately.

Seiji Ishii

By Seiji Ishii

Seiji Ishii is an journey journalist that blurs the traces between work and play, writing about his climbing, two-wheeled and on-foot adventures, and the gear concerned. He’s additionally an AMGA Licensed Single Pitch Teacher and an ACSM licensed private coach, specializing in climbers and motocross/supercross athletes. He lives within the woods together with his spouse, daughter, and a small herd of pets in Wimberley, Texas.

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