Quite Possibly the most influential product since the dropper post.

A few years ago, you may recall a brief 'teaser' blurb from an Interbike booth, or a race pit in Val De Sol -- where Schwalbe had a funky system, with two valves, and required drilling an additional hole in the rim. But the biggest thing of all? It was a dual-chamber, sure-fire way to prevent with 100% confidence that your tubeless tire will remain seated on your rim through the roughest of terrain. The best part of all? No pinch flats!

That prototype left a lot to be desired by many consumers... who really wanted to drill a second valve hole in their rim on a product they were uncertain of? I sure would have, but I'm nuts. Most sane people wouldn't want anything to do with that; plus, it voids your warranty. D'oh!

A year, or two... or maybe it was three years go by with hardly a peep from Schwalbe on this innovative new product, then one day: *ping*, an email alert from our distributor saying ProCore 27.5" is in stock. And after a year of dented rims, pinch-flatted tires, and endless holes blown in tires, I (Alex) was more than enthusiastic to get my hands on this nifty new technology. At the time it was released, there were no internet reviews, very few images, and not a tremendous amount of information on how everything worked. 

So what is it?

Schwalbe's ProCore is a dual-chamber tire inflation system, designed around using a high-pressure tire and tube, sandwiching your tire's bead between an ultralight inner tire at 45-65psi, and the rim's sidewall.

Why?

Because pinch flats.

And burped tires.

And traction.

You may only care about one of those, they may all matter to you. For me, I had jabbed a pointy rock through enough of my tires in an effort to have the traction I wanted from low tire pressure. High tire pressure was not an option, as control and traction went away in an effort to prevent flat tires.

Enter... ProCore.

Weighing in at a whopping 223g for one wheel's worth of ProCore (29" version). This includes the tube, ultralight inner tire, and air guide (little red thing). When you're battling pinch flats and snake-bitten tires left and right, and start to consider Double Down or DH-casing tires; the additional half-pound and the ability to ride a more supple single-ply tires, the choice is clear. ProCore allows you to run the tire pressure you want, without running the risk of a pinch flat, or a burped tire.

Compatible with inner rim widths from 23mm up to 35mm, and tires from 2.2" up to 3.25", ProCore opens up a whole new world of possibilities in the realm of traction. Have you ever wondered what it would be like to run 13psi on your 2.3" Maxxis DHR? Well, it's amazing. How about fearlessly venturing into the nether-regions of ultra-low pressures on your 27.5+ or 29+ setup? Don't even sweat it. Have carbon wheels, but don't want to risk smashing your carbon rims into oblivion? Problem solved.

There is one catch... We have found that the deepest rim that ProCore is compatible with is limited to a maximum of about 25mm. We've successfully installed it on Nox Farlow, but have found that deeper rims just don't quite work without some funky modifications (think drill bit, aluminum billet, and some fun-time on a lathe).

After over a year of riding ProCore on my Nomad, I am extremely happy to say this is my favorite addition to my bike. Eddie, Jordyn, and Dan have all added ProCore to their various bikes, and we all agree -- it. rocks. your. socks. off. Or something like that. Jordyn and I choose to rock it on the rear tire only to protect our most dented and flatted rim / tire, while Eddie and Dan choose to run it front and rear.

Pressure? What pressure?

On average, between the four of us, we typically keep the ProCore tube set to anywhere between 50-60psi; I've somehow settled on 60psi as my sweet spot pressure for the ProCore; for no good reason, really.

However, the "outer tire", your actual tire... My rear tire pressure is typically lower than that of my front. I range from 17.5-19psi on the back for trail riding, and 19-21psi for super chunky rides or bike park riding. The traction and trail-damping characteristics that you are allowed from these low pressures is amazing, and without the fear of your tire unseating or denting your rim, shred forth and ride fearlessly into the sunset!


The Install

Begin by wrapping the rim with the included high-pressure tubeless tape, and poke a nice, clean hole in the rim tape at the valve hole.

Begin by wrapping the rim with the included high-pressure tubeless tape, and poke a nice, clean hole in the rim tape at the valve hole.

Next, take the transparent sticker and place it over the valve hole. This sticker helps to ensure an optimum valve fit, according to Schwalbe. Our theory is that it improves the seal and prevent air leaks.

Next, take the transparent sticker and place it over the valve hole. This sticker helps to ensure an optimum valve fit, according to Schwalbe. Our theory is that it improves the seal and prevent air leaks.

Poke a hole in the strange little stretchy transparent sticker for the valve.

Poke a hole in the strange little stretchy transparent sticker for the valve.

At its core, this is your core (get it?). Top to bottom, the blue high-pressure inner "tire", the red air guide, and the proprietary inner tube with the dual-chamber valve. Add some sealant, and you're set.

At its core, this is your core (get it?). Top to bottom, the blue high-pressure inner "tire", the red air guide, and the proprietary inner tube with the dual-chamber valve. Add some sealant, and you're set.

The little blue decal does two things: it tells you that the wheel is equipped with ProCore, and instructs you in your mid-ride stupor on how to inflate / deflate each air chamber.

The little blue decal does two things: it tells you that the wheel is equipped with ProCore, and instructs you in your mid-ride stupor on how to inflate / deflate each air chamber.

Next, place the valve through the air guide, and inflate the tube just enough to give it shape -- as if you were installing a normal tube in a standard clincher tire.

Next, place the valve through the air guide, and inflate the tube just enough to give it shape -- as if you were installing a normal tube in a standard clincher tire.

Mount the ProCore tire with the silver line centered over the valve hole. Note the pass-through hole for air to transfer from the valve into the main tire.

Mount the ProCore tire with the silver line centered over the valve hole. Note the pass-through hole for air to transfer from the valve into the main tire.

Now install the tube with air guide into the ProCore as you would a normal clincher tire and tube. Do not inflate yet.

Now install the tube with air guide into the ProCore as you would a normal clincher tire and tube. Do not inflate yet.

Now for the tricky part. Place the entire wheel, with uninflated procore into the tire.

Now for the tricky part. Place the entire wheel, with uninflated procore into the tire.

Position the logo as you see fit, and mount the tire one side at a time. It is crucial to install in this order, as any other way simply doesn't happen.

Position the logo as you see fit, and mount the tire one side at a time. It is crucial to install in this order, as any other way simply doesn't happen.

Before mounting the final bead of the tire, take a moment and pour a few ounces of your favorite sealant into the tire. The ProCore kit includes (2) 2-ounce servings of sealant. I can speak from experience, Orange Seal, while a terrific sealant... kind of disagrees with the ProCore valve (it tends to clog).

Before mounting the final bead of the tire, take a moment and pour a few ounces of your favorite sealant into the tire. The ProCore kit includes (2) 2-ounce servings of sealant. I can speak from experience, Orange Seal, while a terrific sealant... kind of disagrees with the ProCore valve (it tends to clog).

Begin by inflating the inner chamber gradually until the ProCore tire pushes the outer tire against the rim and seats. Unthread the valve to access the tire's air chamber, and inflate until it seats fully, then set to your desired pressure. 

Begin by inflating the inner chamber gradually until the ProCore tire pushes the outer tire against the rim and seats. Unthread the valve to access the tire's air chamber, and inflate until it seats fully, then set to your desired pressure.