• Wireless control unit
    Optimize tyre pressure to surface, up to 1.6 bar per km
  • Gravaa wheelset for gravel bikes
    Beneficial on any route, most on gravel
  • Low power consumption
    Human powered pump, with 40hrs of wireless connectivity
See all specs
These are the most buttery-smooth and pleasant carbon wheels we tested and are an ideal choice for racking up big miles on any road, from minty fresh tarmac to aged and weathered pavement, even dirt and hardpack gravel. BikeRumour.com

The result of a joint mission to excellence

Reserve Wheels partnered with GRAVAA and DT Swiss to make their ‘Best All-Around Carbon Road Bike Wheels’ even better. Combining Reserve 40|44 rims with GRAVAA’s KAPS technology and DT Swiss’ hub parts made this set faster on every terrain. The 25.5 | 25 mm inner width aero rims allow the use of various tyre widths.

All wheels with KAPS come with an advanced hub housing our patented high-pressure pump. You power your wheels, your wheels’ rotation drive the pump. The pump activates on demand. our when our innovative clutch and electro-pneumatic system registers a puncture.

  • All wheels with KAPS are fully compatible with standard bikes with disc brakes.
  • Manage your tyre pressure from your handlebars or via the app.
  • Read tyre pressure on your Garmin or Wahoo bike computer .

  • Specifications

    GRAVAA R-40|44 All-road aero comfort
    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 All-road aero comfort
    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
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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