Interbike: Schwalbe Procore dual-chamber tire system

Low pressures for good traction but with good puncture resistance

Interbike Tires

Interbike Mtbr

Schwalbe Procore Cutaway

The opportunity

We’ve all started to discover the benefits of low tire pressures. Traction is improved and rolling resistance is better on the rough stuff. But there is a huge downside of pinch flats and burped tubeless tires. If only there was a way to have high pressure protection and low pressure traction.

What is Procore?

Schwalbe aimed to solve the problem mentioned above by designing the dual-chamber Procore system. There is an inner air chamber that can be run at high pressure and an outer tire chamber that can just focus on optimizing traction and stability.

The inner chamber is an inner tube with a blue sheath that sits right against the rim and its job is to protect the rim and the tire from flats. Its other job is to hold a tubeless tire against the rim for a secure fit to prevent tubeless burps. Pressures for the inner chamber will be around 60 psi and is really just capped by the capacity of the rim to hold outward pressure.

Schwalbe Procore Valve Area

The outer chamber is then a tubeless system compatible with any tire and any sealant. The only requirement is the rim has to be at least 23mm wide internally.

The magic to all this is a presta valve that can inflate the inner and the outer chamber. This is performed one at a time, as the inner chamber is inflated when the valve is set in one position. Screw the valve out in another setting and it’s in a mode to inflate the outer chamber.

Schwalbe Procore Package

Does it work?

Pros are now using it and they are winning. It could be an unfair advantage and the enduro and downhill pros seem to be scrambling now to respond to this technology or get sponsored by Schwalbe.

Its use is All Mountain, enduro and downhill racing for sure, as it adds about 250 grams of weight per tire. But the world is waiting now until its release date of January 2015 and until they can spend their $230 to try out this system.

For more information visit www.schwalbetires.com.

This article is part of Mtbr’s coverage of the 2014 Interbike trade show in Las Vegas. For more from Interbike CLICK HERE.


About the author: Francis Cebedo

The founder of mtbr and roadbikereview, Francis Cebedo believes that every cyclist has a lot to teach and a lot to learn. "Our websites are communal hubs for sharing cycling experiences, trading adventure stories, and passing along product information and opinions." Francis' favorite bike is the last bike he rode, whether it's a dirt jumper, singlespeed, trail bike, lugged commuter or ultralight carbon road steed. Indeed, Francis loves cycling in all its forms and is happiest when infecting others with that same passion. Francis also believes that IPA will save America.


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  • tony says:

    So what really is the difference between the procore and a regular tube? They both do the same thing. The only difference I see is that with the procore you have to air up both the tube and the tire and spend a hell of a lot more money.

    • Soren Cicchini says:

      Well tony, if you still care, aside from keeping a low pressure tyre on the wheel, it’s a bit like having a progressive rate spring inside the tyre. You have the soft, compliant initial performance of the low pressure outer chamber, but the stiffness increases dramatically after the tyre has deformed enough for the high pressure inner chamber to become effective. The closest analogy is probably the elastomeric bump stop used to prevent suspension damage at extreme compression, although it is also a bit like a progressive rate spring/damper combination used to improve performance by preventing the tyre deforming to the extent that you are trying to get grip out of part of the tyre that was never meant to be in contact with the ground.

  • dorse says:

    I don’t see an advantage. I run 18 psi rear tire and 10 psi front tire, with 33mm inside width front rim and 21mm inside width rear rims. I get away with a 530g 2.4 rocket ron rear and 750g 2.4 hansdampf or 800g 2.4 trail-king, on the fronts. I just don’t see these catching on. Why have a 200 gram weight penalty, per wheel. As far as flat protection goes. With tubeless ready tires and Stan’s sealant. I just don’t get flats, ever. My riding weight, pack and all is around 210 lbs. My wife’s riding weight is closer to 115. She uses even less psi. 10 front and 15 rear.

    • DJ says:

      Dorse, the rest of us would burp flat riding that pressure. I’m 210 lbs also and if I run 18 PSI in the back I can reliably burp the tire if I snap a burmed corner. I’m just not sure of this product because I don’t know if I’d want to run that low of a tire pressure on a bike I was riding aggressively. The idea of having a tire fold under me makes me nauseated.

  • Jeff says:

    I have Procore and it’s awesome. I had constant rear pinchflats (casing cuts) when running tubeless. Now I run 16-18psi in the rear and 50 in the procore and the bike suppleness and traction is incredible and I haven’t had a flat in 4000 miles.

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