Gravaa is incredibly easy to use, intuitive and kind of miraculous. It’s also fun. And when did you last say that about your wheels? But behind the Gravaa logo lies a world of design and engineering. Here’s what’s inside and what everything does.
From Holland, With Hubs
The hubs are the heart of Gravaa. They’re just like regular bike hubs right until they start adapting your tire pressure. And then they’re a work of art. The system consists of a front hub, a rear, a hose that runs from the hubs to the rim of each wheel, cockpit controls for manual command and a wireless connection to your bike computer and the Gravaa app on your phone.
From Holland, With Hubs
The hubs are the heart of Gravaa. They’re just like regular bike hubs right until they start adapting your tire pressure. And then they’re a work of art. The system consists of a front hub, a rear, a hose that runs from the hubs to the rim of each wheel, cockpit controls for manual command and a wireless connection to your bike computer and the Gravaa app on your phone.
Up the Pressure
When you or the system decide to up your tire pressure, an actuator-enabled clutch mechanism in the hub connects a camshaft to your thru-axle. That stops the camshaft spinning, which starts tiny pumps working, sending pistons moving and pushing air through a hose connected to your rim, filling your tire with air.
Up the Pressure
When you or the system decide to up your tire pressure, an actuator-enabled clutch mechanism in the hub connects a camshaft to your thru-axle. That stops the camshaft spinning, which starts tiny pumps working, sending pistons moving and pushing air through a hose connected to your rim, filling your tire with air.
Tiny Pump, Big Ambition
Inside each hub is a single membrane pump followed by three cylinders. The stroke of the piston is a tiny 4.5mm. Yet it’s highly efficient. Like everything in the Gravaa, we designed and made the pump. It took years of development and millions of cups of coffee to perfect. There are three cylinders because the air comes in via the atmosphere and gets pumped and pushed through each one, increasing the pressure of the air on its journey to your tire.
Tiny Pump, Big Ambition
Inside each hub is a single membrane pump followed by three cylinders. The stroke of the piston is a tiny 4.5mm. Yet it’s highly efficient. Like everything in the Gravaa, we designed and made the pump. It took years of development and millions of cups of coffee to perfect. There are three cylinders because the air comes in via the atmosphere and gets pumped and pushed through each one, increasing the pressure of the air on its journey to your tire.
Stop the Pressure
So far, we’ve seen how Gravaa increases your tire pressure. But what goes up must come to a stop, and that’s where the actuator does its thing, telling the clutch to disengage from the thru-axle, allowing the camshaft to spin freely once again, deactivating Gravaa and ending the inflation of your tires.
Stop the Pressure
So far, we’ve seen how Gravaa increases your tire pressure. But what goes up must come to a stop, and that’s where the actuator does its thing, telling the clutch to disengage from the thru-axle, allowing the camshaft to spin freely once again, deactivating Gravaa and ending the inflation of your tires.
Drop the Pressure
Reducing your tire pressure (either automatically by Gravaa or via the cockpit controls) is the work of two onboard valves: a tiny electro-pneumatic valve with an aperture of only 0.3mm which triggers a larger mechanical booster valve, which expels air quickly enough to ensure rapid deflation. When pressure is sufficiently reduced, Gravaa cuts power to the electro-pneumatic valve, which closes the mechanical one.
Drop the Pressure
Reducing your tire pressure (either automatically by Gravaa or via the cockpit controls) is the work of two onboard valves: a tiny electro-pneumatic valve with an aperture of only 0.3mm which triggers a larger mechanical booster valve, which expels air quickly enough to ensure rapid deflation. When pressure is sufficiently reduced, Gravaa cuts power to the electro-pneumatic valve, which closes the mechanical one.
Where’s the Air?
If all the action is in the hub, how does Gravaa get the air to your tires or deflate them? For that, we look to the hose and a hard-wired connection between the hub and the valve on your wheel. It operates regardless of whether you ride tubes or tubeless, and works with any tire.
Where’s the Air?
If all the action is in the hub, how does Gravaa get the air to your tires or deflate them? For that, we look to the hose and a hard-wired connection between the hub and the valve on your wheel. It operates regardless of whether you ride tubes or tubeless, and works with any tire.
Small Volts
Despite the mechanical nature of what Gravaa does, it also naturally houses some onboard electronics. These electronics, from the electro-pneumatic pumps and actuator to the Bluetooth/ANT+ connection to your bike computer, cockpit controls and smartphone, require a small amount of power and that comes from an onboard battery that resides inside each hub.
Small Volts
Despite the mechanical nature of what Gravaa does, it also naturally houses some onboard electronics. These electronics, from the electro-pneumatic pumps and actuator to the Bluetooth/ANT+ connection to your bike computer, cockpit controls and smartphone, require a small amount of power and that comes from an onboard battery that resides inside each hub.
Spinning Wheels
In normal use, you can enjoy up to 40 active riding hours on a single charge. You’ll know the batteries are running low via an indication on your bike computer’s display, the Gravaa app on your smartphone or the built-in LED on the side of each hub. Gravaa ships with a power supply featuring a handy magnetic connector to recharge the batteries. We also include the same but with a USB-A plug for charging via a USB socket.
Spinning Wheels
In normal use, you can enjoy up to 40 active riding hours on a single charge. You’ll know the batteries are running low via an indication on your bike computer’s display, the Gravaa app on your smartphone or the built-in LED on the side of each hub. Gravaa ships with a power supply featuring a handy magnetic connector to recharge the batteries. We also include the same but with a USB-A plug for charging via a USB socket.
Rims from Reserve and DT Swiss
Gravaa meets the ground thanks to our rim partners at DT Swiss and Reserve. Both brands deliver the same spirit of innovation, flawless manufacturing and eternal curiosity that powers Gravaa and the work of our team.
Rims from Reserve and DT Swiss
Gravaa meets the ground thanks to our rim partners at DT Swiss and Reserve. Both brands deliver the same spirit of innovation, flawless manufacturing and eternal curiosity that powers Gravaa and the work of our team.
Freehubs from DT Swiss
Whether you choose to ride SRAM, Shimano or Campagnolo, there's a Gravaa wheelset for your bike. Powered by the tech and proven reliability of DT Swiss, Gravaa is compatible with the groupset you're using.
Freehubs from DT Swiss
Whether you choose to ride SRAM, Shimano or Campagnolo, there's a Gravaa wheelset for your bike. Powered by the tech and proven reliability of DT Swiss, Gravaa is compatible with the groupset you're using.
Rotors from Galfer
Gravaa is only a little bigger than a standard hub despite what's inside. But to find a rotor to meet our needs and Gravaa's silhouette, we turned to our friends at Galfer, who created a unique 5-bolt interface. The rotor comes with every Gravaa wheelset.
Rotors from Galfer
Gravaa is only a little bigger than a standard hub despite what's inside. But to find a rotor to meet our needs and Gravaa's silhouette, we turned to our friends at Galfer, who created a unique 5-bolt interface. The rotor comes with every Gravaa wheelset.
Remote control from Classified
Thanks to Gravaa’s easy-reach controls, changing your tire pressure is as simple as pushing two switches on your cockpit. Supplied by our partner Classified and connected via cables to a wireless receiver/transceiver unit installed inside your drop bars, Gravaa’s controls allow instantaneous pressure adjustment.
Remote control from Classified
Thanks to Gravaa’s easy-reach controls, changing your tire pressure is as simple as pushing two switches on your cockpit. Supplied by our partner Classified and connected via cables to a wireless receiver/transceiver unit installed inside your drop bars, Gravaa’s controls allow instantaneous pressure adjustment.
The Gravaa App
From initial setup to ongoing information, settings and more, the Gravaa smartphone app is your hub for everything hubs.
The Gravaa App
From initial setup to ongoing information, settings and more, the Gravaa smartphone app is your hub for everything hubs.
See Your Pressure on Screen
Gravaa’s wireless connection to your bike computer allows you to see your current tire pressure at a glance, helping you gauge whether to inflate or deflate your tires as the terrain changes.
See Your Pressure on Screen
Gravaa’s wireless connection to your bike computer allows you to see your current tire pressure at a glance, helping you gauge whether to inflate or deflate your tires as the terrain changes.
