Off road: Riding at lower pressure means better performance ... but at the same time it increases the risk of failures. The limit so far is at about 20 psi, below which it's hardly possible to dare to ride normal MTB tires.

But nothing stays the same: In the future, air pressure can be controlled in the tire's double chambers. In the outer chamber, the air pressure is extremely low - ideal for maximum off road performance. In the inner chamber, directly on the rim, there is high air pressure – even a very strong impact cannot dent the rim edge. At the same time, the inner high-pressure system secures the tire onto the rim. "Burping", the dreaded loss of air at low pressure in conventional tubeless systems, is impossible.

The name PROCORE is derived from "Progressive Core". The core (internal high pressure chamber) progressively absorbs even the hardest impacts.

The compatibility You can mount Procore with any tubeless compatible MTB tire. The system is available for all three MTB wheel sizes (26", 27.5", 29"). Weight approx. 200 g per wheel. Compatible with all wheels, independent of the brand. Minimum inner rim width: 23 mm. Maximum internal rim width: 40mm. Maximum valve stem depth: 20 mm

PROCORE is a joint development of SCHWALBE and SYNTACE.



PROCORE - the outer chamber
The outer chamber is tubeless. Therefore, any tubeless compatible MTB tires can be used. The tire is filled with some liquid sealant (approx. 60 ml) and should be at least 57 mm (2.25") wide.

PROCORE - the inner chamber
Two special Procore components form the inner high pressure chamber: the special Procore tube and the Procore inner tire. This "core" is extremely high pressure stable and at the same time very light.

The rim
Of course, the rim must be tubeless compatible and sealed with a tubeless rim band. It should have an inner rim width of at least 23 mm. The wider the rim, the easier the installation and the better the performance under low air pressure. The very wide Syntace rims are a perfect fit.

A : MINIMUM internal rim width of 23 mm.
B : MAXIMUM distance from rim well to rim bottom of 20 mm.

The PROCORE valve
The patented dual valve of the Procore tube distributes the air into both chambers. The upper part of the valve is a selector. With a simple turn, you select whether air is pumped into the inner or the outer chamber.

The PROCORE Air Guide
The small red component made of white plastic ensures that the air can flow past the inner high pressure chamber into the outer low pressure chamber.


  • Tire pressure can be reduced to a minimum 14 psi, thus providing a huge amount of grip. Even on the roughest terrain tires "stick" to the ground.

  • The tire provides extremely sensitive cushioning.

  • Due to the extra cushioning and traction there is much better steering, braking and traction control.

  • No more risk of snake bites. The rims are extremely well protected from denting.

  • Even in the toughest conditions, significantly lighter tires can be used.

  • Excellent emergency running characteristics due to the internal high-pressure air chamber.


The PROCORE Air Guide

  • tubeless compatible tire, minimum width 57 mm (2.25")

  • tubeless compatible wheel, minimum rim width 23 mm (with rim widths of 21 or 22 mm the installation can turn out to be very difficult)

The inner chamber (1) consists of the Procore inner tire and the Procore tube with dual valve. The outer chamber is the MTB tubeless compatible tire (2). The rim must be airtight or sealed with the tubeless rim tape. The tape should completely cover the rim base (3). A single layer of rim tape is sufficient. If the supplied 25 mm tape does not fit perfectly, buy tape of a suitable width to replace the one supplied. To pierce a hole for the valve, simply push the valve through the rim tape. Reinforce the rim tape in the area of the valve with the transparent sticker supplied to ensure optimum valve fit (4).

First install the Procore inner tire and the special Procore tube like you would a normal clincher tire and tube (5). Place the airguide above the valve (6) and position the inner tire so that the grooves of the airguides are visible through the small hole (7).

Then install the outer tire: Place the entire wheel inside the tire. Install both beads from the left or right (8).

Before fitting the second tire bead: Make sure that the inner tire is still in its correct position. The line marking must be positioned perfectly at the valve (9).

Complete the installation at the valve on both sides. Caution: Before levering the last section of the tire over the rim edge, make sure that the tire bead is in the drop center of the rim over its complete circumference. The special Procore tire lever helps a lot when fitting is difficult. You can hook it in onto the rim (10).

It will fix the already fitted area of the tire bead so that it remains inside while you lever the final section over the rim.

After installation: Fill with the Doc Blue sealant! Using the tire lever a small section of the outer tire needs to be levered up (11).

Dosage: 60 ml per tire. Shake the bottle well before use. Caution: The Procore system has a special valve. Do not fill the sealant through the valve! Be sure to use the special valve nut with its integrated anti-turn protection in order to seal the valve onto the rim (12).

Inflation of the inner tire as well as the outer tire is through the Procore dual valve. The upper part of the valve (selector) is designed to be set: With the valve completely screwed in the inner chamber is filled (13).

With the valve completely screwed out (about 6 turns) the outer chamber is filled (14).

Inflating and air pressure:

  1. Inflate the inner chamber to 3 bar.

  2. Inflate the outer tire until it has bedded in properly over the entire circumference. (Use Easy Fit assembly liquid, only if the bedding in of the tire turns out to be problematic.)

  3. Subsequently, inflate the inner chamber to a pressure of 6 bar and the outer chamber to the desired pressure. Valve protection: While riding the selector should always be screwed in. Hand pumps should only be used carefully. It is best to only use pumps with a flexible valve connector. The optimum tire pressure depends upon rider weight, riding style and preferences. Start with 1 bar then experiment with new possibilities.



Everything in one set for the conversion of two wheels to PROCORE.
2 x PROCORE inner tire
2 x PROCORE special tube
2 x PROCORE AirGuide
2 x 60 ml Doc Blue
Tubeless rim band
Easy Fit / 50 ml sponge applicator
Tire lever
Fitting instructions




The special inner tire for the PROCORE system - light and high pressure stable.


Special tube for the PROCORE system. Fitted with the patented dual valve to fill both air chambers.


A small part with a crucial function: the AirGuide guides the air from the dual valve into the outer chamber. Can be used for all three wheel sizes (26", 27.5", 29").


New Doc Blue:

Now even better formulated for Tubeless conversions. Produced by Stan’s NoTubes! It can also be used as a puncture potection preventative for bicycle tubes, tubular tires and standard Tubeless systems.


60 ml/tire (Race bike 30 ml). Effective ca. 2-7 Months. Thereafter dries to a rubber film. Can be renewed. Only suitable for tubes with a removable valve core. Not effective on large defects (cuts/bursts).


The tubeless rim tape is extremely user friendly and at the same time very high pressure resistant. Even on road bikes a single ply of tape is sufficient.


Tire changing made easy! 

The special shape of the lever reduces the danger of the tube being pinched during installation. When removing a tire, the lever can be snapped onto the spoke – leaving hands free for the second lever. The high-quality plastic is virtually unbreakable. Levers can be clipped together for easy storage.

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