• Wireless control unit
    In- & deflate tyres endlessly via wireless control
  • Ideal for MTB XC
  • Low power consumption
    Only low human power required while inflating
See all specs
XC-28 for mtb wheels

The revolution is here

We all know riding on mountainbike trails can be demanding. Because the surface of the trail changes throughout the ride it’s always a compromise (or gamble) which tyre pressure you need for the front and rear tyre when you go out for your ride. In the end you often settle for the middle ground regarding tyre pressure. After years of research and engineering we have developed high-end wheelsets which enable you to manage your tyre pressure during your ride.

The lightweight wheels compose of carbon rims and advanced hubs, in which a miniature high-pressure pump is stored. This pump is driven by the rotation of your wheels: by you. Via an integrated clutch unit and electro-pneumatic wireless control system the pump gets only active on demand. The wheels are fully compatible with standard bikes with disc brakes. You manage your tyre pressure wireless from your handlebars. Meanwhile, all relevant information can be displayed on your bike computer or smartphone.

  • Specifications

    GRAVAA XC-28 DOMINATE THE MTB TRAILS
    Gravaa XC-28 wheelset
    GRAVAA GX-30 UNLEASH YOUR GRAVEL POTENTIAL
    GRAVAA GX-30 Wheelset
    Ideal for MTB XC riding Bike touring, Gravel riding
    Wheel size 29"(622) 29"(622)
    Brake type Disc brake only Disc brake only
    Weight 1990 g (boost) 1970 g (non-boost)
    Rim type Carbon, TLR Carbon, TLR
    Rim materials Carbon Carbon
    Rim height 28 mm 30 mm
    Rim inner width 25 mm, 30 mm, I will specify this later 25 mm
    Tyre types Clincher - Tubeless ready Clincher - Tubeless ready
    Tubeless ready Yes* Yes*
    Tubular version
    Hub type Boost (110 mm front, 148 mm rear) Boost (110 mm front, 148 mm rear), Non-boost (100 mm front, 142 mm rear)
    Max. system weight 110 kg (rider + bike) 110 kg (rider + bike)
    ANT+
    Bluetooth
    Disc brake rotor front 140 mm disc, 160 mm disc, 180 mm disc, I will specify this later 140 mm disc, 160 mm disc, 180 mm disc, I will specify this later
    Disc brake rotor rear 140mm disc, 160mm disc, 180 mm disc, I will specify this later 140mm disc, 160mm disc, 180 mm disc, I will specify this later
    Number of spokes 28 28
    Spoke offset 2.5 mm 2.5 mm
    Spoke type DT Swiss Competition Race (1.6 mm) DT Swiss Competition Race (1.6 mm)
    Spoke nipple type DT Swiss Pro Lock 2.0 mm (aluminum) DT Swiss Pro Lock 2.0 mm (aluminum)
    Freehub system 6 - pawl freehub system, for fast engagement 6 - pawl freehub system, for fast engagement
    Freehub body Campagnolo N3W 13 speed, M-body (Shimano/SRAM 9-10-11 sp, Campagnolo 10-11-12 sp), Shimano Microspline 12 speed, SRAM XD/XDR, I will specify this later Campagnolo N3W 13 speed, M-body (Shimano/SRAM 9-10-11 sp, Campagnolo 10-11-12 sp), Shimano Microspline 12 speed, SRAM XD/XDR, I will specify this later
    GRAVAA XC-28 DOMINATE THE MTB TRAILS
    Gravaa XC-28 wheelset
    GRAVAA GX-30 UNLEASH YOUR GRAVEL POTENTIAL
    GRAVAA GX-30 Wheelset
    Tyre used for specs 29x2.25" tyre (57-622) 29x1.50" tyre (40-622)
    Inflation on the fly While riding While riding
    Deflation on the fly During standstill, While riding During standstill, While riding
    Tyre pressure operating range 0.5 - 6.0 bar 0.5 - 6.0 bar
    Average inflation rate 200-250 mbar/min at 25 km/h 400-450 mbar/min at 25 km/h
    Average deflation rate >100 mbar/s >200 mbar/s
    Inflation rate related to riding speed?
    Deflation rate related to riding speed?
    Average power consumption during inflation 2 - 4.5 W at 25 km/h, between 1 and 6 bar (per wheel) 2 - 4.5 W at 25 km/h, between 1 and 6 bar (per wheel)
    Average power consumption during deflation 0 W 0 W
Cross country Gravel bike Cyclocross
Cross country Gravel bike Cyclocross
Cross country Gravel bike Cyclocross
Manage tyre pressure via your bike computer or our gravaa app

Gravaa enables you to control tyre pressure on the fly

After years of developing, prototyping and testing we are ready to hit the markets with our revolutionary wheelsets. You can manage the tyre pressure with a flick of the thumb while riding. This can be done via a wireless control unit that is mounted on the handlebars. Next to the fact that your tyre pressure is shown on a bike computer it can also be displayed via a GRAVAA app on your smartphone. This mobile app will be made available for download in the Google Play Store and Apple App Store.Want to know more? Read more about our technology here.

Get 20% off now and pay for this wheelset in 2 installments:

  • Immediately: 10% of sales price
  • At delivery: 90% of sales price

Use the pre-order button and configure your desired wheelset.

Verkuijl test

Jasper Verkuijl tested our wheels

Check it on YouTube