• Wireless control unit
    In- & deflate tyres endlessly via wireless control
  • Gravaa wheelset for gravel bikes
    Ideal for road races on cobbles and gravel
  • Low power consumption
    Only low human power required while inflating
See all specs

Can handle all pavement!

The GRAVAA R-40|44 is the result of a partnership between top-quality brands GRAVAA, Reserve Wheels and DT Swiss. The wheelset consists of Reserve 40|44 rims and are equipped with GRAVAA’s KAPS technology and DT Swiss’ hub parts. Altogether, this set will make you the fastest rider on every terrain. This wheelset is made for competition road and gravel racing, and the 25.5 | 25 mm inner width aero rims allow the use of various tyre widths.

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 R-40|44 Reserve X Gravaa
    Ideal for Gravel riding, Competition road racing
    Wheel size 29"(622), 700c
    Brake type Disc brake only
    Weight 1970 g
    Rim type Carbon, TLR
    Rim materials Carbon
    Rim height 40 | 44 mm
    Rim inner width 25.5 | 25 mm
    Tyre types Clincher - Tubeless ready
    Tubeless ready
    Tubular version
    Hub type Non-boost (100 mm front, 142 mm rear)
    Max. system weight 110 kg (rider + bike)
    ANT+
    Bluetooth
    Disc brake rotor front 140 mm disc, 160 mm disc, 180 mm disc
    Disc brake rotor rear 140mm disc, 160mm disc, 180 mm disc
    Number of spokes 28
    Spoke offset 0 mm
    Spoke type DT Swiss Aerolite / Aero Comp
    Spoke nipple type DT Swiss Pro Lock 2.0 mm (aluminum)
    Freehub system DT Swiss Ratchet System (36 teeth)
    Freehub body SRAM XDR, Campagnolo N3W, Shimano Microspline
    GRAVAA R-40|44 Reserve X Gravaa
    Tyre used for specs 700x30c tyre (30-622)
    Inflation on the fly While riding
    Deflation on the fly During standstill, While riding
    Tyre pressure operating range 2.0 - 7.0 bar
    Average inflation rate 1.3 bar/km
    Average deflation rate >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)
    Average power consumption during deflation 0 W
Cross country Gravel bike Cyclocross
Cross country Gravel bike Cyclocross
Cross country Gravel bike Cyclocross

Gravaa enables you to control tyre pressure on the fly

After years of developing, prototyping and testing we are hitting the markets with our revolutionary carbon wheelsets. Want to know more? Read more about our technology here.

manage your tyre pressure during each race